Increase Animal Productivity Research Articles

Broilers Litter Management: A Review of Environmental Impacts, Nutritional Value and Sustainable Utilization

The continuous demand for animal protein occasioned by increase in population has placed much pressure on researchers across the world for improved ways towards increasing animal productivity. The situation is unpalatable as efforts in meeting the needs have been met with insecurity, unregulated policy, natural disasters, unnecessary community conflicts, and problems of land grabbers most especially in developing nations. This has therefore necessitated at different fora exploration of alternative feed resources to increase animal’s productivity and arrest the ugly trernd. Broilers litter, which include poultry droppings, feed waste and also bedding materials has been identified as possible feed resource technology for the ruminant animals’ production. They have high quality nutritional value and can be manipulated and improved upon for higher animal yield. The use of the litter in ruminants business has become an increasingly popular area in ruminant animal agriculture. Although there are associated concerns for safety of meat and milk products from animals managed on such diets despite its high energy contents. Incidentally, information of its inclusion in the diets of ruminant animal agriculture has not been adequately documented. This therefore forms the basis for this work putting into consideration the consequential effects of broiler litters on animal health, its processing, sustainability, safety and its relative implication for the good of man and his environment. Keywords: Feed shortage, non-conventional feeds, poultry litter, environment

Proteomic identification of potential biomarkers for heat tolerance in Caracu beef cattle using high and low thermotolerant groups

BackgroundHeat stress has deleterious effects on physiological and performance traits in livestock. Within this context, using tropically adapted cattle breeds in pure herds or terminal crossbreeding schemes to explore heterosis is attractive for increasing animal production in warmer climate regions. This study aimed to identify biological processes, pathways, and potential biomarkers related to thermotolerance in Caracu, a tropically adapted beef cattle breed, by proteomic analysis of blood plasma. To achieve this goal, 61 bulls had their thermotolerance evaluated through a heat tolerance index. A subset of 14 extreme animals, including the seven most thermotolerant (HIGH group) and the seven least thermotolerant (LOW group), had their blood plasma samples used for proteomic analysis by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The differentially regulated proteins detected between HIGH and LOW groups were used to perform functional enrichment analysis and a protein-protein interaction network analysis.ResultsA total of 217 proteins were detected only in the HIGH thermotolerant group and 51 only in the LOW thermotolerant group. In addition, 81 and 87 proteins had significantly higher and lower abundancies in the HIGH group, respectively. Regarding proteins with the highest absolute log-fold change values, we highlighted those encoded by DUSP5, IGFALS, ROCK2, RTN4, IRAG1, and NNT genes based on their functions. The functional enrichment analysis detected several biological processes, molecular functions, and pathways related to cellular responses to stress, immune system, complement system, and hemostasis in both HIGH and LOW groups, in addition to terms and pathways related to lipids and calcium only in the HIGH group. Protein-protein interaction (PPI) network revealed as important nodes many proteins with roles in response to stress, hemostasis, immune system, inflammation, and homeostasis. Additionally, proteins with high absolute log-fold change values and proteins detected as essential nodes by PPI analysis highlighted herein are potential biomarkers for thermotolerance, such as ADRA1A, APOA1, APOB, APOC3, C4BPA, CAT, CFB, CFH, CLU, CXADR, DNAJB1, DNAJC13, DUSP5, FGA, FGB, FGG, HBA, HBB, HP, HSPD1, IGFALS, IRAG1, KNG1, NNT, OSGIN1, PROC, PROS1, ROCK2, RTN4, RYR1, TGFB2, VLDLR, VTN, and VWF.ConclusionsIdentifying potential biomarkers, molecular mechanisms and pathways that act in response to heat stress in tropically adapted beef cattle contributes to developing strategies to improve performance and welfare traits in livestock under tropical climates.

Growth, development and commercial traits of sturgeon fish species under industrial fi sh farming conditions when use the feed additive Abiotonic

Artificial fish farming including commercial sturgeon farming using highly nutritious balanced feeds is nothing less than a strategically important area in Russian agriculture. In recent years, methods for increasing animal productivity using highly biologically active additives both natural and artifi cial, which have a growth-stimulating, protective and immune-modulating eff ect on the body of animals at various stages of development, have found wide application. These include the feed additive Abiotonic. In the literature studied by us, we found no information on the eff ect of the feed additive Abiotonic on the growth, development and livability of sturgeon fi sh, as well as on the quality indicators of the resulting fi sh products. In this regard, studies aimed at studying the eff ect of the vitamin-microelement growth immunostimulant Abiotonic on the productivity of sturgeon fi sh are relevant. The purpose of the research was to study the growth, development and commercial traits of sturgeon fi sh species under industrial fi sh farming conditions using the feed additive Abiotonic. The research established the optimal amount of the feed additive Abiotonic for use in the diets of the hybrid Russian and Siberian sturgeon inder industrial fi sh farming conditions. Thus, when rearing sturgeon fi sh with high productive and commercial traits, as well as with low feed costs per unit of fi sh weight gain and the cost of fi sh products under industrial conditions, we recommend that fish farms use the feed additive Abiotonic in the diets of sturgeon fi sh in the mount of 1.0 ml per 1.0 kg of fi sh body weight.

Alternative treatment methods for bovine mastitis: prospects and limitations (review)

Mastitis remains the most common problem of dairy industry despite the preventive measures and treatment schemes being developed. Antibacterial drugs remain first line agents for therapy of the mammary gland inflammatory diseases in animals. Taking into account the risks associated with antibiotic therapy, such as decreased drug effectiveness due to occurrence of bacterial resistant strains, food safety issues, environmental impact and restrictions on the use of antibacterial drugs in veterinary medicine, an increasing number of scientific studies are addressing new therapeutic agents that can serve as an alternative to conventional therapy. The aim of this review is to give an idea of currently available literature data on alternative methods for the prevention and treatment of mastitis in cattle that are not associated with antibiotics. In general, a significant number of in vitro studies aimed at finding new effective and safe drugs are yielding promising results. This review describes the following alternative remedies: probiotics, bacteriocins, bacteriophages, phage enzymes (endolysins), nanoparticles, plant extracts, essential oils and immunobiological agents (vaccines). Understanding the mechanisms of their action will allow recommending the best treatment option for mastitis in each specific case. These treatment methods can potentially reduce use of antibiotics and increase animal productivity, however more in vivo studies are needed to prove the effectiveness of antibiotics used directly in the conditions of farm settings.

The effectiveness of using plant-based feed supplement made of Astragalus cicer in the diets of laying hens

Agricultural producers are increasingly using plant-based feed additives in the diets of livestock and poultry as a way to increase animal productivity and stabilize the protective functions of the body. The purpose of the research was to study the effectiveness of using Astragalus cicer feed supplement in the diets of laying hens of the Lohmann Brown-Light cross at the age of 25-51 weeks. The composition of the compound feed included a phytoadditive made from Astragalus cicer in the volume: I experimental group – 3.60 %, II experimental – 7.20 % by the weight of the compound feed. The duration of the scientific and production experiment was 183 days. The analysis of the content of biologically active substances in the Astragalus cicer phytoadditive has revealed a high content of dihydroquercetin – 336.25 mg/100g of absolutely dry substance.image As the result of the research, it was found that laying hens of the II experimental group, which received 7.20 % of Astragalus cicer phytoadditive in the compound feed, had more intensive metabolic processes in the body, which contributed to obtaining a greater effect from them. Laying hens of the II experimental group compared with the control and I experimental groups had 2.19 and 2.18 % higher values of nitrogen utilization out of taken feed, egg production was higher by 2.81 and 1.10 %, the cost of compound feed decreased by 10 pcs. eggs, that was by 4.76 and 2.38 %, respectively. The profitability level of egg production in the II experimental group was higher compared with the control and I experimental groups by 3.83 and 5.16%, respectively.

PERFORMANCE CHARACTERISTICS AND NUTRIENT DIGESTIBILITY OF WEST AFRICAN DWARF GOATS FED MALTED SORGHUM SPROUT MIXED WITH PINEAPPLE WASTE BASED DIET

The feeding value of malted sorghum sprout mixed with pineapple waste (MSPW) was evaluated using 16 West African Dwarf (WAD) goats in a completely randomized design for 84 days. The malted sorghum sprout and pineapple waste mixture were obtained at ratio 1:2 (weight/weight) respectively. MSPW was included in compounded ration at varying proportions of 0%, 20%, 40% and 60% MSPW respectively formulate four dietary treatments. Data were collected on growth performance and digestibility. Result showed that there were no significant differences (P>0.05) on the growth performance parameters measured in this study but the highest value of final body weight (7.79 kg), Average daily weight gain (19.21 g/day), metabolic weight (9.14 g/day) and Concentrate DMI (200.03 g/day) was observed in 20% MSPW while the lowest value was obtained in 40% MSPW. Goats fed 20% MSPW had the best feed conversion ratio value (17.15). Significant differences (P<0.05) among treatments were observed in all the nutrient digestibility parameters measured except the ether extract, neutral detergent fibre and the cellulose. Highest dry matter, crude protein, ash, acid detergent fibre, acid detergent lignin and hemicellulose digestibility values were observed in goats fed 20% MSPW. It was concluded that MSPW could be used up to 20% in WAD goats' diet without any adverse effect on the growth performance and nutrient utilization purposely to increase animal productivity at least cost.

Mitigation potential of methane emissions in China's livestock sector can reach one-third by 2030 at low cost.

The mitigation of methane (CH4) emissions from livestock production is crucial to China's carbon neutrality. Here we established a high-spatiotemporal-resolution dataset of the country's livestock CH4 emissions from 1990 to 2020 using four large-scale national livestock greenhouse gas inventory surveys. We estimate CH4 emissions to be 14.1 ± 2.0 Mt in 2020 and to increase by 13% until 2030 despite CH4 intensity per kg animal protein having decreased by 55% in the past 30 years. Approximately half of the emissions come from 13% of all Chinese counties. The technical CH4 mitigation potential is projected to be 36 ± 8% (4.4-6.9 Mt CH4) in 2030, and reducing food loss and waste could mitigate an additional 1.6 Mt of CH4. Overall, most CH4 mitigation could be achieved by increasing animal productivity and coverage of lagoon storage at carbon prices below US$100 tCO2e-1, being more cost-effective than livestock nitrous oxide mitigation in China.

‘Unlock the Complexity’: Understanding the Economic and Political Pathways Underlying the Transition to Climate-Smart Smallholder Forage-Livestock Systems: A Case Study in Rwanda

The livestock-dairy sector in Sub-Saharan Africa, particularly in Rwanda, is experiencing rapid growth due to population expansion, urbanisation, and changing food preferences. The unmet local production demands are causing soil and water pollution, competition for biomass, land, and water, but also grassland degradation, biodiversity loss, and increased GHGs emissions. Rwanda has the lowest productivity in the region, largely due to inadequate and poor-quality livestock feed resources. To increase animal productivity, promoting forage species with higher nutritional value and better adaptation to drought-prone and poor-fertility soils could be beneficial. Using a mixed-methods approach, the study explores Brachiaria forage adoption and profitability and analyses policy objectives and measures to overcome adoption barriers and promote the transition from subsistence to market-oriented systems. Results show that Brachiaria, although advantageous from an economic point of view, is characterised by very low adoption rates. Furthermore, access to extension programmes is limited and often not supported by adequate incentives. To overcome such barriers, policy interventions should be harmonised and information and knowledge management prioritised, public and private extension and advisory services (EASs) programmes coordinated, agricultural input subsidies increased, and institutional coordination promoted to enhance climate-smart animal feeding.

Alternative ways of using the mushroom substrate as an additive for feed with the purpose of improving animal productivity in agriculture (review)

In modern agriculture, considerable attention is paid to the search for effective and environmentally safe methods of increasing animal productivity. One of the promising directions is the use of mushroom substrate as feed additives. Residual mushroom substrate is often considered as waste, but its processing and use can help reduce feed costs and increase farm profitability. In addition, the use of mushroom substrate helps to reduce the burden on the environment, promoting a closedproduction cycle. In the article it is considered the alternative ways of using mushroom substrate as a feed additive in order to improve the productivity of animals in agriculture. Mushroom substrate, the residual product after growing mushrooms, contains a rich complex of nutrients, such as proteins, vitamins, minerals and other bioactive components. The use of this substrate as a feed additive can provide economic benefits for farms, reducing the cost of traditional feed and increasing animal productivity. Studies indicate a positive effect of the mushroom substrate on the health of animals, in particular on the improvement of immunity and the general physiological state. In addition to economic benefits, the use of mushroom substrate helps to reduce the amount of waste and improve the environmental sustainability of agriculture, meeting the principles of circular economy and sustainable development. Objective. To analyze alternative ways of using mushroom substrate as animal feed additives. In the article it is reviewed modern research and practical experience of using mushroom substrate, its chemical composition and potential benefits for animal husbandry. Special attention is paid to the effect of mushroom substrate on the health of animals, their productivity and general economic indicators of farms. Revealing the potential of mushroom substrate as a feed additive can be an important step in the development of sustainable agriculture, in particular, in the conditions of growing demand for food and resources for its production. Conclusions. The article emphasizes the needfor further research to optimize the methods of using the mushroom substrate in feed rations of various animal species and to develop new technologies for its processing. The practical implementation of these studies can significantly increase the efficiency and competitiveness of agricultural enterprises. Keywords: mushroom substrate, chemical composition, feed additive, animal productivity, agriculture, bioactive components, feeding.

ОСНОВНЫЕ ТРЕНДЫ РОСТА РЕГИОНАЛЬНОГО СЕЛЬСКОГО ХОЗЯЙСТВА: ОТ ОБЪЕМОВ К УСТОЙЧИВОСТИ

The strategic task until 2030 for the agro-economic systems of the country and its regions is to increase the average annual growth rate of volumetric indicators of agricultural production to 3%, which is twice as high as the achieved value. To achieve this aim, it is necessary to develop and implement effective mechanisms to smooth out the abrupt growth of production volumes and ensure the sustainable development of agricultural sectors. The development of the agricultural sector of the Republic of Tatarstan shows positive trends in the growth of volumetric indicators of production over the past five years. The volume of gross agricultural output in the region increased with an annual growth rate of 21.62 billion rubles. At the same time, the volume of production growth in the crop and livestock sectors amounted to 11.11 and 10.49 billion rubles, respectively, which demonstrates the uniform development of the two main industries. The growth in volumetric indicators of product production is mainly due to the intensification of production processes, the introduction and development of innovative technologies. Along with this, abnormal weather conditions have a negative impact on the process of sustainable development of agriculture, as evidenced by the results of 2021, when the total production volume was only 80.1% of the previous year’s level, and crop production decreased by 38.7%. The identified trend once again emphasizes the need to search for adaptive methods of farming in accordance with climate change by moving at a more intensive pace to the creation of drought-resistant varieties, the development of moisture-saving technologies and the active implementation of reclamation measures. Livestock farming is developing at a more sustainable pace, although there is a decline in the numbers of certain animal species. However, this process does not affect production volumes due to increased animal productivity. The industry is in the process of gradually replacing low-productive animals with highly productive breeding stock. To transition to sustainable development of agriculture in the republic, it is necessary to continue work on adapting technological processes to climate change, creating and introducing new varieties, developing genetic technologies for animal breeding, using digitalization and robotization of the industry.

Improving an agroforestry system with livestock in southern Brazil

Agroforestry systems hold significant environmental and cultural value but are yet to receive economic valorisation. In southern Brazil there is a centuries old agroforestry system called Caíva which is classified as a silvopastoral system, combining native trees, cattle herds and pastures. Caívas occupy significant land area and contribute to priceless forest conservation, maintaining rare and threatened trees, but challenges of legal insecurity, low economic yield and ineffective management are threatening the preservation of caívas. To address these challenges, the Agricultural Research and Rural Extension Company of Santa Catarina State (Epagri) began conducting research in 2006 to develop technologies that would increase productivity while maintaining forest cover. Their technology has shown promising results, increasing animal production by up to 400% while still maintaining the tree stratum and active forest regeneration. Epagri’s technologies are based on five activities: the selection of adapted perennial pastures, planting improved pastures without soil disturbance, soil liming and annual fertilisation, rotational grazing, and overseeding with ryegrass and clover during the autumn/winter period. By adopting Epagri's technologies, caíva owners can increase their income, maintain active forest regeneration, and ensure legal certainty over their properties. These strategies are primarily applicable to open and very open caívas, and it is recommended that other types of caívas be used for the preservation and provision of ecosystem services. Research on caivas improvement has shown multiple benefits, emphasising the importance of continued investment in research and development, to further valorise agroforestry systems. It is essential, however, to balance these productive improvements with the maintenance of permanent preservation areas and mixed ombrophilous forest landscapes.

Biological availability of mineral elements

The animal husbandry industry is the leading branch of our country’s agro-industrial complex, on the one hand, its development determines the level of public consumption of valuable food products, and on the other hand, the economic well-being of the agricultural sector of the economy. It is known that the productivity of farm animals depends on feeding and keeping conditions by 70–80 % and on genetic potential by 20–30 %. Balanced animal nutrition is an important part of the efforts to increase livestock productivity, it is based on meeting the energy and nutrient needs of animals and poultry at different ages. If this requirement is met, you can expect high growth and development of young animals, and high productivity. The application of biologically active substances, including minerals, as catalysts for metabolism is one of the means to increase animal productivity and resistance. Numerous studies have proven their significant role in the processes of tissue respiration, hematopoiesis, reproduction, nervous and endocrine system functions, and consequently in the processes of strengthening the natural immune defenses of animals. Breeders use different sources of macro- and microelements to compensate mineral deficiencies in the diet. It can be mineral additives of industrial production, or natural sources or industrial waste containing certain mineral elements. The availability of certain macro- and microelements in mineral sources, the cost of these additives, and the costs of their purchase and transportation are important. Particular attention is paid to the mineral nutrition of poultry, which has high growth energy, intensive metabolism and a well-developed reproductive function. Special attention is focused on the mineral nutrition of poultry, as they have high growth energy, intensive metabolism and a well-developed reproductive function. An unbalanced mineral nutrition significantly reduces the body’s productivity and resistance, causes significant metabolic disorders, reproductive disorders and diseases, which can often cause poultry death. The most common reason for the declining productivity and immune system is insufficiently balanced feeding in the conditions of production intensification. The intensive use of poultry causes changes in metabolism, reducing the content of micro and macro elements, vitamins and other biologically active substances in the body.

Overview: mineral elements and their role in animal nutrition

The intensification of livestock farming is aimed at a comprehensive increase in the production of milk, meat, wool, and other products by increasing the productivity of livestock and poultry and obtaining the maximum amount of product per unit of feed consumed with the lowest possible labor and cost. One of the main ways to increase animal productivity is through proper feeding. An imbalance in the rations in terms of essential and biologically active substances leads to metabolic disorders, a decrease in natural immunity, and diseases of the reproductive system, negatively affecting economic efficiency. The current use of industrial technologies for harvesting roughage and juicy feed is often violated, which leads to a decrease in its quality and high demand for protein, vitamins, and trace elements; in this regard, it is necessary to improve existing and look for new methods of production, evaluation, and use of feed and feed additives. Minerals ingested with water and feed play an essential role in animal nutrition. Quite often, both an excess of some and a lack of other trace elements are detected, which leads to a decrease in animal productivity and a deterioration in the quality of the products obtained from them. The lack of mineral elements can cause significant economic losses to livestock enterprises due to the massive occurrence of animal diseases and metabolic disorders, especially in the winter and spring. Trace elements play an essential role in animal nutrition, as they considerably impact the body's defenses, hematopoiesis, endocrine glands, and digestive tract microflora, participate in protein biosynthesis, and regulate metabolism. The extent to which minerals are used in the diet depends not only on their quantity and appropriate ratio but also, to a large extent, on the level of the organic part of the diet (proteins, fats, carbohydrates) and vitamins. It has been proven that the additional introduction of deficient trace elements into the diet of animals increases their levels in the body, primarily in the liver. Thus, when determining the need for mineral elements in animals, their ratio to other biologically active substances should be considered based on balanced feeding. However, it should be noted that the level of absorption of trace elements by animals largely depends on the form of their compounds.

An In Vitro Study on the Role of Cellulases and Xylanases of Bacillus subtilis in Dairy Cattle Nutrition.

The administration of Bacilli to dairy cows exerts beneficial effects on dry matter intake, lactation performance, and milk composition, but the rationale behind their efficacy is still poorly understood. In this work, we sought to establish whether cellulases and xylanases, among the enzymes secreted by B. subtilis, are involved in the positive effect exerted by Bacilli on ruminal performance. We took advantage of two isogenic B. subtilis strains, only differing in the secretion levels of those two enzymes. A multi-factorial study was conducted in which eight feed ingredients were treated in vitro, using ruminal fluid from cannulated cows, with cultures of the two strains conveniently grown in a growth medium based on inexpensive waste. Feed degradability and gas production were assessed. Fiber degradability was 10% higher (p < 0.001) in feeds treated with the enzyme-overexpressing strain than in the untreated control, while the non-overexpressing strain provided a 5% increase. The benefit of the fibrolytic enzymes was maximal for maize silage, the most recalcitrant feed. Gas production also correlated with the amount of enzymes applied (p < 0.05). Our results revealed that B. subtilis cellulases and xylanases effectively contribute to improving forage quality, justifying the use of Bacilli as direct-fed microbials to increase animal productivity.

Hayvan Sayısında Artış İklim Değişikliğini Etkiler mi? Türkiye Örneği

The Agricultural Sector is one of the sectors that cause the most significant greenhouse gas emissions due to using fertilizers, agricultural mechanization, paddy cultivation, and especially animal husbandry. Although the agricultural sector causes climate change, it is one of the sectors most affected by climate change. Reducing greenhouse gas emissions from agricultural production is essential for the sustainability of agriculture and the food security of people. This study analyzes long and short-term cointegration between agricultural greenhouse gas emissions and livestock activities in Türkiye using data covering 1990-2019. According to the analysis results, using the Autoregressive Distributed Lag (ARDL) bound testing method, a positive and statistically significant relationship was found between the number of cattle, bovine animals, poultry, and CO2 emissions. In the long run, a 1% increase in the number of bovine animals (BA), sheep and goats (SG), and poultry (P) in Türkiye will increase CO2 emissions by 0.87, 0.09, and 0.09%, respectively. In the short term, only a positive and significant relationship was found between the number of bovine animals and CO2 emissions. These results reveal that policymakers should evaluate people’s efforts to increase animal production to ensure food security and policies to reduce greenhouse gas emissions.

МИКРОБИОМ РУБЦА И МОЛОЧНАЯ ПРОДУКТИВНОСТЬ КОРОВ ПРИ ИСПОЛЬЗОВАНИИ ФЕРМЕНТНО-ПРОБИОТИЧЕСКОЙ КОРМОВОЙ ДОБАВКИ «ПРОФОРТ»

The transition of dairy farming to an industrial basis contributes to an increase in the productive indicators of cattle, including due to the transition to a uniform year-round feeding. From the physiological point of view, a uniform feeding system contributes to the preservation of the species and quantitative composition of the microflora, maintaining its high enzymatic activity. With year-round uniform feeding, it is particularly important to provide the animal’s body with biologically adequate nutrition, which depends not only on the quantity but also on the quality of the feed. The use of additives in the feed ration, including those based on probiotic preparations, helps to improve digestive processes, normalize the balance of microflora, metabolism and increase animal productivity. The aim of the research was to analyze the rumen microbiome and milk productivity of cows using the enzyme-probiotic feed additive Profort under conditions of year-round uniform feeding. The studies were conducted in lactating Holstein cows. The cows of the experimental group were fed 30.0 g of the probiotic three times during 15 days, with a 15-day interval. In the experimental group, at the family level, the taxa of cellulolytic bacteria Prevotellaceae, Oscillospiraceae, SR1. showed the most significant reliable differences The maximum total content of beneficial cellulolytic bacteria after the use of the enzymeprobiotic preparation was found in the rumen content of the cows of the experimental group. It was 75.34 ± 2.0%. The minimum content (74.89 ± 1.2%) was found in the control group. The content of lactate-utilizing bacteria, which ferment lactic acid in the rumen to volatile fatty acids, increased to an average of 1.14 ± 0.5% in the cows of the experimental group. The average daily milk yield increased from 4.7 to 6.1%, and the mass fraction of fat and protein in milk increased by 1.05–1.75% and 0.64–1.29%, respectively, depending on the feeding period.

Effects of two types of Coccomyxa sp. KJ on in vitro ruminal fermentation, methane production, and the rumen microbiota.

Coccomyxa sp. KJ is a unicellular green microalga that accumulates abundant lipids when cultured under nitrogen-deficient conditions (KJ1) and high nitrogen levels when cultured under nitrogen-sufficient conditions (KJ2). Considering the different characteristics between KJ1 and KJ2, they are expected to have different effects on rumen fermentation. This study aimed to determine the effects of KJ1 and KJ2 on in vitro ruminal fermentation, digestibility, CH4 production, and the ruminal microbiome as corn silage substrate condition. Five treatments were evaluated: substrate only (CON) and CON + 0.5% dry matter (DM) KJ1 (KJ1_L), 1.0% DM KJ1 (KJ1_H), 0.5% DM KJ2 (KJ2_L), and 1.0% DM KJ2 (KJ2_H). DM degradability-adjusted CH4 production was inhibited by 48.4 and 40.8% in KJ2_L and KJ2_H, respectively, compared with CON. The proportion of propionate was higher in the KJ1 treatments than the CON treatment and showed further increases in the KJ2 treatments. The abundances of Megasphaera, Succiniclasticum, Selenomonas, and Ruminobacter, which are related to propionate production, were higher in KJ2_H than in CON. The results suggested that the rumen microbiome was modified by the addition of 0.5-1.0% DM KJ1 and KJ2, resulting in increased propionate and reduced CH4 production. In particular, the KJ2 treatments inhibited ruminal CH4 production more than the KJ1 treatments. These findings provide important information for inhibiting ruminal CH4 emissions, which is essential for increasing animal productivity and sustaining livestock production under future population growth.

Influência de suplementos de baixo e médio consumo na fase de crescimento de novilhos mantidos em pastagem tropical e terminados em confinamento

ABSTRACT: The objective was to evaluate the animal production and ingestive behavior of the steers fed different supplements during the growth phase in Aruana grass, and the influence of this supplementation on production performance in feedlot phase. The treatments consisted of three supplements during the growing phase: mineral salt (0.12 g/kg of body weight - BW), low intake energy-protein supplement (1.26 g/kg of BW), and medium intake (3.76 g/kg of BW). Forage canopy characteristics, animal production, and animal behavior on pasture were evaluated in a completely randomized design with three replicates (paddocks). The titanium dioxide marker was used to determine the intake and apparent digestibility during the pasture phase. The production performance in feedlot was evaluated in a completely randomized design with eight replicates (animals). Twenty-four Aberdeen Angus steers (15 ± 1.5 months old; 364.8 ± 21.7 kg BW) were used. At the end of the growth phase the animals were confined and fed a single diet. Dry matter, crude protein, and neutral detergent fiber (NDF) contents of forage and intake were not influenced by the treatments. The average daily gain was higher for the medium intake supplement in pasture phase. The apparent digestibility of NDF (P = and chewing rate were higher for the medium intake supplement. The average daily gain and fat thickness of carcasses were higher for the medium intake supplement in the feedlot phase. The supplements of medium intake increase animal productivity during the growing phase on pastures and cattle’s finishing performance in intensive production systems.

К вопросу технико-экономической оценки эффективности функционирования технологии приготовления кормовых продуктов с использованием соево-зерновых композиционных смесей

Finding the most profitable economic ways is associated with providing farm animals with the necessary amount of nutrients in their feed rations. By reducing feed costs and using plant resources in the Far East, it is possible to reduce the cost of livestock products and increase their competitiveness. One such plant resource is soybean. Soybeans and soy products increase their productivity and also help maintain this industry at a high level. The rational use of soybean grain and its processed products is associated not only with the presence of protein, minerals, fat and vitamins in its composition, but it is also necessary to ensure an increase in the palatability of soybeans and the bioavailability of protein. It is possible to increase animal productivity by using soybean products in diets. After analyzing the literature, a generalized structural and functional diagram of the process of preparing feed products using soybean-grain compositions was compiled During the research, the economic efficiency of the production of new types of feed products and a model for technical and economic assessment of efficiency were determined. Keywords: SOY-GRAIN COMPOSITE MIXTURES, HIGH-PROTEIN FEED PRODUCTS

System fertilization in the pasture phase enhances productivity in integrated crop–livestock systems

Different fertilization strategies can be adopted to optimize the productive components of an integrated crop–livestock systems. The current research evaluated how the application of P and K to soybean (Glycine max (L.) Merr.) or Urochloa brizantha (Hochst. ex A. Rich.) R. D. Webster cv. BRS Piatã associated with nitrogen or without nitrogen in the pasture phase affects the accumulation and chemical composition of forage and animal productivity. The treatments were distributed in randomized blocks with three replications. Four fertilization strategies were tested: (1) conventional fertilization with P and K in the crop phase (CF–N); (2) conventional fertilization with nitrogen in the pasture phase (CF + N); (3) system fertilization with P and K in the pasture phase (SF–N); (4) system fertilization with nitrogen in the pasture phase (SF + N). System fertilization increased forage accumulation from 15 710 to 20 920 kg DM ha/year compared to conventional without nitrogen. Stocking rate (3.1 vs. 2.8 AU/ha; SEM = 0.12) and gain per area (458 vs. 413 kg BW/ha; SEM = 27.9) were higher in the SF–N than CF–N, although the average daily gain was lower (0.754 vs. 0.792 kg LW/day; SEM = 0.071). N application in the pasture phase, both, conventional and system fertilization resulted in higher crude protein, stocking rate and gain per area. Applying nitrogen and relocate P and K from crop to pasture phase increase animal productivity and improve forage chemical composition in integrated crop–livestock system.