Grass Content Research Articles

Express measuring of grass moisture content in field

Повышение качества травяных кормов остаётся одним из важнейших направлений укрепления кормовой базы. Низкое качество основных объёмистых кормов приводит к значительному увеличению количества зерна в рационе животных. Динамика изменения влажности скошенной растительной массы, потери объёмной массы и питательных веществ трав в зависимости от погодных условий, длительности уборки, видов технологических операций и применяемых технических средств определяют качество растительной массы. Цель работы — оперативный контроль влажности свежескошенной и подвяленной травы в интенсивных технологиях заготовки кормов без дополнительной подготовки проб с использованием макета влагомера. Экспериментально исследованы характеристики пространственной чувствительности планарного ёмкостного датчика макета влагомера трав. Определена величина эффективного проникновения ЭМП датчика в растительный материал. Разработан микроконтроллерный блок управления измерениями, индикации измеряемых данных, хранения градуировочных характеристик, формирования базы измеряемых данных, осреднения результатов измерений, связи с внешним компьютером и создано соответствующее программное обеспечение. Проведена полевая апробация макета прибора контроля влажности и электропроводности скошенных трав, в ходе которой уставлено соответствие возможностей макета к предъявляемым в технологиях заготовки кормов требованиям. Основной научный и практический результат заключается в том, что предложено конструктивное решение, создан и апробирован полевой прибор, разработана научно-методическая и техническая инфраструктура управления измерениями влажности и электропроводности кормовых трав непосредственно в валках и прокосах без дополнительной подготовки проб с диапазоном измерения влажности до 85%. Increase in grass fodder quality keeps the leading position in forage security improvement. Low quality of top bulky feeds results in significant raise of grain forage in livestock diet. Variation in moisture content of cut mass, loss of bulky mass and nutrients due to weather conditions, length of harvesting period, technological practices and equipment affect plant mass quality. The research aimed at monitoring of moisture content of fresh and air-dried grass, using moisture tester prototype without extra probe preparation. The prototype was analyzed in spatial sensitivity of planar capacitive sensor. We determined the value of effective penetration of sensor electromagnetic field into plant material. Microcontroller unit was developed together with a respective software, allowing data display mode, storage of calibration parameters, creation of data base, calculation of mean values and connection to an external computer. Prototype tests in field showed its adequate response to required criteria in intensive feed preparation technology. The conducted work provided structural concept of measurements, developed and tested new field device. The moisture tester determined the water content within a range of up to 85% as well as grass electrical conductivity directly in windrows and swath with no probe preparation.

Rumen fluid fermentation for enhancement of hydrolysis and acidification of grass clipping

Rumen fluid, formed in rumen of ruminants, includes a complex microbial population of bacteria, protozoa, fungi and archaea, and has high ability to degrade lignocellulosic biomass. In this study, rumen fluid was used to ferment grass clipping for enhancing the hydrolysis and acidification of organic matters. Results showed that strict anaerobic condition, higher grass clipping content and smaller particle size of grass clipping were beneficial to the hydrolysis and acidification of organics. The increase of SCOD and total VFA concentration respectively reached 24.9 and 10.2 g/L with a suitable grass clipping content of 5%, a particle size <0.150 mm, and a fermentation time of 48 h. The VFA production was mainly attributed to the degradation of cellulose and hemicellulose with a total solid reduction of 55.7%. Firmicutes and Fibrobacteres were the major contributors to the degradation of cellulose and hemicellulose. The activity of carboxymethyl cellulose enzyme (CMCase), cellobiase and xylanase reached 0.027, 0.176 and 0.180 U/ml, respectively. The rumen fluid microorganisms successfully enhanced the hydrolysis and acidification of grass clipping.

&lt;b&gt;Ruminal degradation of elephant grass silages added with faveira pods

The objective of this study was to evaluate in situ ruminal degradability of elephant grass silages with addition of 8, 16 and 24% of faveira pods in experimental silos of 100x50 mm, equipped with bunsen valves. The content of crude protein (cp) and neutral detergent fiber (ndf) were determined on a dry matter basis. To evaluate the in situ degradability of dm, cp and ndf, nylon bags containing 4 g sample were incubated in the rumen of three fistulated cattle for 6, 24 and 72h. The dm and cp content of elephant grass silages increased (p &lt; 0.05) from 8% inclusion associated with a higher concentration of constituents in faveira pods (77.25 and 9.61% dm). The ndf fraction reduced 10.91% (p &lt; 0.05) when adding 24% pods. The potential degradation (pd) of dm and cp increased with inclusion of faveira pods, with 75.97 and 95.21%, respectively, for the level of 24%. There was increased potentially degradable fraction (bp) of ndf by 7.07% with inclusion of 24% faveira pods, as well as a reduced colonization time (lag) from 3.81 to 3.44 hours. The addition of up to 24% faveira pods to elephant grass silages improves rumen microbial degradation, and it is indicated this level of addition to obtain better quality silage.

Total Phenolic Content and Antibacterial Activity of Nut Grass (Cyperus rotundus L.) Extract

Abstract. The objectives of this research was to study the macroscopic, the microscopic and phytochemicals characterization of raw materials, total polyphenol content and the antibacterial activity of nut grass extracts (Cyperus rotundus L.) against Shigella dysenteriae, Salmonella typhimurium, Staphylococcus epidermidis, and Pseudomonas aeroginosa. The macroscopic and the microscopic characterization of raw materials were done with the determination of the water contents, the water soluble contents, the ethanol soluble contents, total ash and acid soluble ash. The extract was prepared by percolation using n-hexane, ethanol, and ethyl acetate as solvents. Phytochemical screening was done on the raw materials as well as n-hexane, ethyl acetate, and ethanol extracts. Total phenol contents were tested with the Folin-Ciocalteu reagent method. The antibacterial activity test was done by measuring the diameter of the inhibition zones using the diffusion agar method. The results showed that raw material retrieved 7.33% water content, 21.85% water soluble contents, 7.9% ethanol soluble contents, 1.53% total ash, and 0.67% total insoluble-acid ash. The phytochemical study showed that the nut grass contains various secondary metabolites including flavonoids, glycosides, saponins, anthraquinone glycosides, and steroid/triterpenoids. The total polyphenol contents of ethanol extracts were expressed as catechin equivalents 1.1616 mg/g extract. All of the nut grass extract showed antibacterial activity. Ethyl acetate extract of nut grass indicated the highest antibacterial activity against Shigella dysenteriae, Salmonella typhimurium, and Pseudomonas aeroginosa. Ethanol extract was only effective against Staphylococcus epidermidis.&#x0D; &#x0D; Keywords: Antibacterial Activity, Bacteria, Cyperus Rotundus L Extracts, Phenolic

Cultivation of wheat grass and development of value added products incorporting wheat grass juice and wheat grass powder

Wheat grains germinated for over a period of 2-3 days is usually called as the wheatgrass. Wheat grass being rich in various nutrients and phytochemicals makes it effective in many chronic diseases like atherosclerosis, anaemia, diabetes, thalassemia, leukaemia, breast cancer, and ulcerative colitis. The present study was conducted with an objective to cultivate wheat grass, to analyse proximate composition of wheat grass powder and chlorophyll content in fresh wheat grass and to develop value added products by incorporating wheat grass juice and wheat grass powder for cancer patients. Four commonly consumed recipes were standardized and 4 variations of each recipe were developed for cancer patients and the recipes were also evaluated for sensory characteristics. The estimated values of proximate composition of wheat grass powder per 100g are 14.3±0.13 (moisture), 4.52±0.33 (Total ash), 1.74±0.08 (Crude fibre), 18.55±0.195 (Protein), 40.29±0.229 (Carbohydrate), 293.26±1.18 (Energy) and estimated value of chlorophyll in 100 g fresh wheat grass was found to be 484.43±12.27.

The changes of the assimilation pigments content of turf Festuca spp. leaves after application of different nutrition forms

The changes of the assimilation pigments content of turf Festuca spp. leaves after application of different nutrition forms

Predators attract prey through ecosystem engineering in the Arctic

AbstractPredators can affect prey through mechanisms other than predation; for example, redistributing resources could modify habitats favorably for other organisms. We examined Arctic fox (Vulpes lagopus) den use by lemmings, their primary prey, in winter during a year of low lemming densities. We found winter nests, which are built by lemmings under snow, on 69% of fox dens, whereas no control sites had nests. In August, dens had twice the vegetation cover and 50% greater nitrogen content in grass than controls, suggesting soil enrichment by foxes increased food quantity and quality for herbivores. Snow was ~4 times thicker in April on dens than controls, and 1.4 times thicker on dens with lemming nests than dens without, suggesting lemmings choose thicker snow for thermal insulation. Snow cover thickness was positively related to vegetation cover on dens, but not on control sites. Thus, Arctic foxes not only prey on lemmings but also engineer productive habitat that attracts lemmings. During winters with low lemming densities, when foxes often leave the denning area and predation risk is lower, fox dens may provide a refuge that could buffer the effects of deteriorating snow conditions with Arctic warming. This additional mechanism of predators interacting with their prey illustrates how ecosystem engineers potentially alter food web interactions and highlights the importance of integrating these bodies of theory in attempts to understand community dynamics.

Urochloa decumbens grown with different Eucalyptus clones in an integrated crop-livestock-forest system

The objective of this study is to evaluate the forage mass, chemical composition, mineral content, and mineral absorption in signal grass (Urochloa decumbens) grown with different eucalypt clones in an integrated crop-livestock-forest (iCLF) system. The split-split-plot scheme included three replicates arranged in a completely randomized block design. The eucalyptus clones GG 100 and I 144 (Eucalyptus grandis × Eucalyptus urophylla) and VM 58 (Eucalyptus grandis × Eucalyptus camaldulensis) were distributed in the plots. The split plots corresponded to the growth ages of signal grass (10, 17, 24, 31, 38, 45, and 52 days after corn harvest for silage). The split-split plots corresponded to two sampling sites: center of the inter-row and soil under the Eucalyptus canopy. The Eucalyptus clones did not affect the forage mass of the grass. Forage mass was increased linearly as the grass matured and was more readily available in the center of the inter-row than under the tree canopy. The grass grown with clone I 144 presented better chemical composition, with higher levels of crude protein and phosphorus and lower levels of neutral detergent fiber. The Eucalyptus clones did not significantly affect mineral absorption. However, the Eucalyptus clones, grass age, and sampling sites significantly changed potassium absorption. It is concluded that the forage mass of signal grass is suitable for use in grazing at 38 to 52 days after corn harvest in the iCLF system in the autumn season in the Midwest region of Minas Gerais, without compromising the chemical composition of the grass.

On-farm Performance Evaluation of Selected Perennial Grass under Rain- Fed Conditions at Deghabour District, Cherer Zone, Ethiopian Somali Region

The study was conducted to evaluate the adaptability and performance of some improved perennial forage species. Completely randomized block design were employed with three treatments and the treatments were replicated three times. The seeds of the forage species were row planted on finely prepared seed bed on nine plots. At the end of the experiment sample from forge species were taken analyzed for nutritional value. Crude protein, dry matter, ash, NDF and ADL were analyzed in Haramaya university nutrition laboratory. Data on plant height, numbers of branch per plant, fresh and dry biomass yield, germination and maturity date of the experimental treatments were collected and analyzed by using general linear model procedure of SAS. The germination and maturity date of the experimental treatments are presented. Analysis of variance shows that there no significant different among the treatments in both parameter. However the germination date of panicum maximum slightly earlier than the other two treatments and also late maturity compared to buffalo grass and Rhodes grass. The biomass yield both in terms of fresh and dry biomass of the experimental treatments in this study are significantly different (P<0.0001). The fresh biomass yield of panicum maximum is significantly greater than both Rhodes grass and buffalo grass. Similarly the dry mass yield of panicum maximum is significantly larger than the other two treatments (P<0001). According to the finding of the current study, the mean plant height and branches per plant of the experimental treatments are presented. The analysis of variance shows that there are significant different in the number of branches, but the plant height for Rhodes grass is significantly larger than the other experimental treatments (buffalo grass and panicum maximum). The results of the laboratory analysis and estimation of nutritive values of the different experimental treatments are shown. The study revealed that the dry matter percentage of the three treatments, buffalo grass, Rhodes grass and panicum maximum are 92.96, 92.57 and 92.81 respectively, which indicate there is no significant different in dry matter percentage among the treatments. The crude protein content of Rhodes grass (15.49) is numerically larger than buffalo grass (13.37) and panicum maximum (14.17). As a conclusion, introduction of improved perennial forage species such as buffalo grass, Rhodes grass and panicum maximum in the study area revealed better performance. Therefore, based the finding of the current study the following future work can be recommended. The main challenge in the present study was lack of intensive agronomic practice that has negative impact on the overall performance of the forage species. Hence, it is will be better to undertake further study in large scale with appropriate agronomic package under irrigated condition rather than rain fed.

Fatty acid composition of maize silages from different hybrids

Fatty acid composition of maize silages from different hybrids

Growth and ursolic acid content of pearl grass (Hedyotis corymbosa) on variations in water availability

Abstract. Anam K, Mudyantini, Rakhmawati R. 2017. Growth and ursolic acid content of pearl grass (Hedyotis corymbosa) on variations in water availability. Cell Biol Dev 1: 55-62. The purpose of this study is to determine how different water sources affect the growth and levels of ursolic acid in pearl grass (Hedyotis corymbosa (L.) Lam.). A factorial, completely randomized design (CRD) with a single factor of five replications each was used for the experiment. Water stress conditions were created by providing different levels of water availability in the growing media, namely 40, 60, 80, and 100% field capacity (control). The plants were given the treatment for 8 weeks. Plant growth, including the number of leaves, fresh and dry weight, and plant ursolic acid content, were all measured in this study. The data were analyzed using analysis of variance (ANOVA), and the DMRT test at the 5% test level was used to determine the significant difference between treatments. The results showed that the water availability treatment significantly affected the number of leaves, fresh weight, and dry weight, but it did not affect the ursolic acid content in plants. The treatment with the lowest water availability (40% KL) produced low yields on growth parameters and ursolic acid levels. Ursolic acid levels were lowest under drought stress conditions (40% KL), while they were highest under excess water conditions (100% KL).

Pertumbuhan dan Kandungan Asam Oleanolat Rumput Mutiara (Hedyotis Corymbosa) pada Berbagai Dosis Pupuk Kandang Sapi dan Pupuk Organik Cair

&lt;p&gt;Research on the growth and oleanolic acid content of pearl grass (Hedyotis corymbosa) in experimentall field of Medicinal Plants and Traditional Medicines Research and Development Center (B2P2TOOT), Tanjungsari Village, Tegal Gede Village, Karanganyar and B2P2TOOT laboratory, Tawangmangu, Karanganyar. The research has been conducted in August to November 2017. The purpose of this research is to know the dosage of cow manure and liquid organic manure which has the most influence to the growth and the oleanolic acid content of pearl grass. The experiment was designed in a randomized complete block design with twelve treatments and three repication. The observed data analyzed using variance analysis with 5% level then if there was a significant difference in the continued test with Duncan’s Multiple Range Test (DMRT). The results showed that the use of cow manure at doses of 0 kg-1m2, 4,6 kg-1m2, 6,1 kg-1m2 and 7,6 kg-1m2 did not give increase to all observation variables. The use of POC dose 0 ml-1liter, 5 ml-1liter and 10 ml-1liter did not give increase to all observation variables. All given treatments may show that oleanolic acid is present in pearl grasses.&lt;/p&gt;

Nitrogen fertilization of warm‐season turfgrasses irrigated from varying irrigation systems: 2. Carbohydrate and protein content

AbstractA 3‐year study was conducted at New Mexico State University in Las Cruces, NM, to investigate whether different fertilization treatments affect the carbohydrate and protein content in two warm‐season grasses grown using water conservation strategies such as non‐potable saline irrigation water and a subsurface irrigation system. “Princess 77” bermudagrass (Cynodon dactylon L.) and “Sea Spray” seashore paspalum (Paspalum vaginatum O. Swartz) were irrigated with either potable (electrical conductivity [EC] = 0.6 dS m−1) or saline (EC = 3.1 dS m−1) water from either an overhead or a subsurface drip irrigation system. Four different fertilizers were used in this study: liquid slow release, granular slow release, granular urea and urea liquid, at two rates: 10 and 20 g N m−2 yr−1 for “Sea Spray” and 20 and 30 g N m−2 yr−1 for “Princess 77.” Carbohydrate (sucrose, starch, total soluble carbohydrates and total non‐structural carbohydrates) and protein content of the grasses were measured, and their effect on spring green‐up was determined. The total carbohydrate content within the stolons and rhizomes was found to be closely associated with speed of spring green‐up, resulting in R2 values ranging from 0.36 to 0.76. The relationship between green‐up and carbohydrate content was similar for both grasses. Fertilizer treatment did not affect carbohydrate content in either grass under either irrigation system. Further analysis revealed that carbohydrate content in February was the best determinant for spring green‐up. Other sampling months also showed a significant correlation with spring green‐up, but with lower R2 values.

Does silica concentration and phytolith ultrastructure relate to phytolith hardness?

Abstract Grasses are an important part of the forage of many herbivorous mammals and their phytoliths have long been regarded as the most important agent of tooth wear. Recent work has challenged this “paradigm” in finding evidence 1. of native phytoliths to be much softer then tooth enamel and 2. indicating, that phytolith hardness is highly variable, 3. prone to methodology and 4. not easy to be related to habitat conditions. We conduct controlled silica-cultivations measuring SiO2 content in the common forage grass Themeda triandra. Phytoliths are extracted natively, and nano-indentation values are measured. Phytolith hardness in Themeda triandra is found to be independent of silicate availability in the substrate. We further investigate the phytolith ultrastructure of Hordeum vulgare phytoliths. Phytoliths are shown to be an anisotropic composite of at least 3 components, silica bodies, inter-body matrix (both mineralised) and globular inclusions (likely non-mineralised). It can be argued, that indentation will be largely influenced by the heterogeneity of the structure and thus nano-indentation measurements will largely reflect the matrix and its mechanical properties but not necessarily the silicate bodies, which make up the vast majority of a phytolith.

ALTERNATIVES FOR SPRING FORAGE EMPTINESS IN PAMPA, BRAZIL

The spring forage emptiness is an obstacle to the development of Brazilian livestock, including in the Bioma Pampa region. Feed strategies for this period contributed to the development of livestock and to the conservation of the biome. The objective of this work was to know the nutritional potential of forages during spring forage for use as strategies in the forage planning. The experiment had a completely randomized design, with ten forages and four replicates. The chemical composition, in vitro dry matter digestibility (IVDMD) and the total digestible nutrient content (NTD) of elephant grass, brachiaria cultivars Convert and Marandu, Tifton 68; diploid and tetraploid ryegrass; red, white and arrowleaf clover; and bird’s-foot trefoil. The grasses had a higher proportion of fibrous constituents, and lower levels of NDT and DMD, thus, lower nutritional value. Negative correlation between mineral matter and fibrous constituents with CP, TDN and IVDMD, was observed. Forages studied can be used as pasture alternatives for ruminants in the spring forage emptiness of the Pampa, Brazil, however, the strategy of using them should be a pasture planning.

Relation between morphology and dietary traits in horse jugal upper teeth during the middle pleistocene in Southern France

The morphometric adaptations and the phyletic evolution of the Equus genus during the Quaternary are still the focus of many studies. Several forms (species/subspecies) of Middle and Upper Pleistocene horses have been described in Europe but their spatio-temporal variations, in relation to the environment and the climate require further clarification. This is the case in particular for a typical Middle Pleistocene form: Equus mosbachensis ssp. In this paper, we present combined morphological and ecometric observations based on the upper teeth from three subspecies of this form from five sites: Camps-de-Peyre (E. m. campdepeyri), La Micoque (E. m. micoquii), Lunel-Viel I and Lunel-Viel IV (Equus m. palustris) and Igue des Rameaux (E. mosbachensis ssp.). The understanding of the specific characteristics of this taxon should enable us to better define the occupied habitat and environment. This preliminary study shows the importance of the adaptive capacities of Equus mosbachensis and the pertinence of combined paleontological and ecometric studies for enhancing our understanding of the ecology and the evolution of fossil ungulates. In addition, some authors have postulated that the length of the protocone is correlated to a diet with a high grass content. Although this tendency may have existed during the Quaternary, our study shows, on a smaller chronological scale, that there is no correlation between this measurement and horse diet and paleoenvironment.

Effect of KOH Pretreatment on Lignocellulosic Waste to be Used as Substrate for Ethanol Production

In present study, Leptochloa fusca (Kallar grass) and Gossypium herbarium (cotton stalk) were treated with various concentrations of KOH (1, 1.5, 2, 2.5 and 3%) for different soaking periods (6, 12, 24 and 48 h) to expose maximum cellulosic content. The results showed that maximum cellulose exposure and delignification was increased with the increase in concentration of alkali and soaking time. However, maximum cellulose content (Kallar grass 49.01 ± 0.1%, cotton stalk 56.12 ± 0.1%) was achieved with 2.5% KOH at 24 h and a decline was observed as further increase in concentration of KOH (3%). Moreover, maximum delignification (Kallar grass 66.2%, 62.6 cotton stalk) was observed at 3% KOH after 48 h of soaking period. However, these results showed adverse effect of higher concentration of alkali on holocellulose. The cellulosic content of Kallar grass and cotton stalk after pretreatment at suitable conditions indicated that these substrates could be used as promising substrates for saccharification process to the produced second generation biofuel.

Long‐term time series of legume cycles in a semi‐natural montane grassland: evidence for nitrogen‐driven grass dynamics?

Summary Several dynamic models have shown that dynamics of legumes and grasses can result in periodic behaviour. These oscillations arise due to delays in nitrogen flows coupled with differences in ability to compete for light. However, long‐term time series on legume dynamics that could be used to test predictions of these models are almost non‐existent. We examine legume oscillations in a semi‐natural mountain grassland using a long‐term (Tilde; 30 years) data series on aboveground biomass of individual species and on nitrogen and phosphorus content over time. Using autocorrelation analysis, we show that there is a strong periodicity (with period of 8–9 years) of legume and grass biomass and nitrogen content in the grass biomass. These three variables are in fairly stable phase shifts relative to each other, with a grass peak followed by a peak in C : N ratio in grasses which is followed by a legume peak. Phosphorus content in either legume or grass biomass does not show synchronous cycling with legume or grass biomass or nitrogen content in grass. Fitting a dynamic linear model to the data showed that legumes affect nitrogen content in grasses, and grass biomass both affects and is affected by nitrogen content. In contrast, there is no negative effect of grasses on legumes, indicating some other process must be responsible for the legume decline. Manuring, which was occasionally applied to the plots, also does not seem to affect the cycling. Second‐order term for legumes showed some evidence of self‐inhibitory effects in legumes, but phosphorus content in legumes shows no support for phosphorus limitation. The most likely explanation of the legume decline should be sought elsewhere (pathogens, soil biota etc.). Synthesis. Long‐term data support the existing the claim that legume dynamics are the key driver of nitrogen dynamics in nutrient‐poor semi‐natural grasslands. Grasses benefit from the nutrient enrichment due to legume cycling, but are a passive element and do not play a role in legume limitation. Apart from the role of nutrient cycling, these legume‐driven nutrient dynamics also constitutes processes by which long‐term richness of meadows is maintained.

Effects of Altered Seasonality of Precipitation on Grass Production and Grasshopper Performance in a Northern Mixed Prairie.

Climatic changes are leading to differing patterns and timing of precipitation in grassland ecosystems, with the seasonal timing of precipitation affecting plant biomass and plant composition. No previous studies have examined how drought seasonality affects grasshopper performance and the impact of herbivory on vegetation. We modified seasonal patterns of precipitation and grasshopper density in a manipulative experiment to examine if seasonality of drought combined with herbivory affected plant biomass, nitrogen content, and grasshopper performance. Grass biomass was affected by both precipitation and grasshopper density treatments, while nitrogen content of grass was higher with early-season drought. Proportional survival was negatively affected by initial density, while survival was higher with early drought than with full-season drought. Drought timing affected the outcome, with early summer drought increasing grass nitrogen content and grasshopper survival, while season-long and late-season drought did not. The results support arguments that our knowledge of plant responses to seasonal short-term variation in climate is limited and illustrate the importance of experiments manipulating precipitation phenology. The results confirm that understanding the season of drought is critical for predicting grasshopper population dynamics, as extreme early summer drought may be required to strongly affect Melanoplus sanguinipes (F.) performance.

Efficiency of using organic and mineral fertilizers in fodder crop rotation on northern soddy podzols

This article presents a stationary field test on light clay loam conducted to study the influence of organic and mineral fertilizers and their combinations on the fertility and productivity of this soil. The efficiency of using organic (PMC of 80 t/ha) and mineral (NPK) fertilizers in combination is shown for a sixfield crop rotation. The average crop yield of potato, annual grass, and perennial grass for two crop rotation phases was 3.9, 4.4, and 6.6 t/ha of dry matter, respectively. The fertilizers, especially organic-mineral ones, contributed to the increase in starch content in potato to 13–13.6% (11.6% in the reference sample) as well as the increase in crude protein content in annual and perennial grass to 14.4 and 15.2%, respectively (10.3 and 11.6% in the control sample). It has been noted that organic and organic-mineral fertilizer systems produce a positive effect on the organic matter content in soil.