Different Doses Of Nitrogen Fertilizer Research Articles

Pengaruh Dosis Pupuk Nitrogen terhadap Produktifitas Hidroponik Fodder Jagung (Zea Mays)

This research is intended to identify the effects of nitrogen fertilizer on fresh production., dry material production (DM ), organic mater production ( OM ) crude pretein (CP) fodder mayze (zea mays). This research was carried out in the field lab of animal science departemen, Faculty of health and science, University Nusamara PGRI Kediri. research design in this study use a complete random design 4 treatment with 5 replicated. Treatment use concentration nitrogen fertilizer (T0 = 0 ml / l) ,( T1 =0.8 ml / l ), (T2 =1.6 ml / l ), (T3 =2.4 ml / l ). Studies show that different levels of nitrogen fertilizer can affacted to DM production (p < 0.01 ), OM production (p < 0.01 ) and CP production (p < 0.01) maize fodder (zea mays ).The conclusion of this study is that the use of different doses of nitrogen fertilizer has an effect on the production aspect of maize fodder (Zea mays )

Effect of different doses of nitrogen fertilizer (urea) on the yield performance of mustard (Brassica sp.)

An experiment was conducted at the agriculture research field of Noakhali Science and Technology University, Noakhali-3814, Bangladesh during the period 1st November 2021 to 30 January 2022 to observe the effect of different levels of nitrogen (N) fertilizer on growth and yield of mustard. The experiment comprised four levels of nitrogenous (N) fertilizer viz; control (N0) 0 kg ton ha-1, (N1) 90 kg ton ha-1, (N2) 140 kg t ha-¹, (N3) 190 kg t ha-1. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Application of different levels of nitrogen significantly influenced the Plant height (cm), branches plant-1 (no.), effective siliqua plant-1 (no.), seeds siliqua (no.), 1000-seed weight (g), grain yield (t ha-1), stover yield (t ha-¹), biological yield (t ha-1), harvest index (%) content of mustard. Application of 190 kg ha-1 nitrogen gave the maximum plant height (77.83 cm), Branches plant-1 (5.80), Effective siliqua plant-1 (23.60), Siliqua length (6,17 cm), Seeds siliqua (33.87), 1000-seed weight (3.57 g), grain yield (1.53 t ha-1), Stover yield (3.90 t ha-1), Biological yield (5.43 t ha-1) and the lowest yield was found from control (N0) 0 kg ton ha-1. Consequently, ‘BARI SARISHA-14’ may be suggested to grow for higher yield with N3 treatment. Res. Agric. Livest. Fish. Vol. 10, No. 2, August 2023: 99-107

Potensi Kompos, tepung Azolla dan Dedak sebagai bahan Pembawa Bakteri Pemfiksasi N (BPN) dalam meningkatkan pertumbuhan dan hasil gabah Padi Gogo pada Inceptisols Jatinangor

Rice is an important commodity in Indonesia because rice is the main source of carbohydrates for the Indonesian. Rice production in Indonesia relies on lowland rice, but the productivity of lowland rice is decreasing. One of the efforts to increase rice national production is utilizing upland rice plants. The problem with upland rice is its low productivity. Nitrogen-fixing biological fertilizers can be used to increase the productivity of upland rice plants. The effect of different doses of nitrogen fertilizer and nitrogen fixing bacteria with different carrier materials on the growth and yield of upland rice in Inceptisols Jatinangor was studied. Randomized block design with two factors: the recommended dose of urea fertilizer (100% and 50%) and the nitrogen-fixing bacteria factor with different carriers (compost, rice bran, and Azolla powder) were applied as an experimental design. The experimental results showed that the interaction of nitrogen fertilizer dose and nitrogen-fixing bacteria with different carriers had no significant effect on plant height, number of panicles, root shoot ratio, and weight of 1000 grains of upland rice plants. Application of nitrogen-fixing bacteria with compost, bran, and Azolla powder as carriers was able to increase the average weight of the filled grain higher than the control.

Effect of different doses of nitrogen fertilization on bioactive compounds and antioxidant activity of brown rice.

Brown rice as a whole grain food is associated with various chronic diseases' reduced risks. In this study, the effects of different doses of nitrogen fertilization (0, 160, 210, 260, 315, and 420 kg N/ 100 m2) on bioactive compounds and antioxidant activity of brown rice (yanfeng47) were investigated. At nitrogen level of 210-260 kg N/100 m2, the content of TFC (302.65 mg/100 g), β-sitosterol (1762.92 mg/100 g), stigmasterol (1358.735 mg/100 g), DPPH (74.57%), and OH free radical scavenging (74.19%) was the highest. The major phenolic acid was p-hydroxybenzoic acid. There were significant positive linear relationships between TFC (0.872, 0.843), β-sitosterol (0.896, 0.657), stigmasterol (0.543, 0.771), p-hydroxybenzoic acid (0.871, 0.875), and DPPH, OH antioxidant activity. These indicated that TFC and phytosterols were the most important components in brown rice that had strong antioxidant activity. Composite score of principal components indicated 210 Kg N/100 m2 exhibited a more ideal dose of nitrogen for nutritional composition and antioxidant activity of brown rice.

The development of brown rust and the productivity of winter triticale with the use of biofungicide against the background of different doses of nitrogen fertilizers

The development of brown rust and the productivity of winter triticale with the use of biofungicide against the background of different doses of nitrogen fertilizers

Effects of manure combined with nitrogen fertilizer on yield and quality of winter wheat and soil biological characteristics in drylands of Northwest China

We conducted an experiment with five treatments in winter wheat of the dryland of Northwest China, i.e. 30 t·hm-2 cow dung (M) plus different doses of nitrogen fertilizer (0, 75, 150, 225, and 300 kg N·hm-2), denoted by M+N0, M+N75, M+N150, M+N225, and M+N300, respectively. After three years of treatment, wheat yield, grain quality, and soil biological characteristics were measured in two consecutive years (2018 and 2019). The results showed that the combination of manure with nitrogen fertilizer significantly increased wheat yield compared with the manure-only treatment (M+N0). Compared with the manure-only treatment, the combined treatments significantly increased wheat grain protein content, wet gluten, sedimentation value, and extensibility, but not for starch content. Neither wheat yield nor grain quality had significant differences among the M+N150, M+N225, and M+N300 treatments, but both were prominently higher than those of M+N75. Soil microbial biomass carbon (MBC) and nitrogen (MBN) reached highest in M+N150 for both years, which were distinctly higher than those of M+N0, M+N225, and M+N300. In 2018, soil β-1, 4-glucosidase, cellobiohydrolase, L-leucine aminopeptidase, β-1,4-N-acetyl glucosaminidase, and alkaline phosphatase activities in M+N150 treatment were higher than those of other treatments. In 2019, soil enzyme activities (excluding L-leucine aminopeptidase) in M+N150 were higher than those of M+N0 and M+N225. MBC significantly positively correlated with MBN, and both significantly positively correlated with the activities of cellobiohydrolase, β-1, 4-N-acetyl glucosaminidase, and alkaline phosphatase. MBN significantly positively correlated with total nitrogen content and negatively correlated with NO3-. Considering winter wheat yield, grain quality, and soil biological characteristics, M+N150 was conducive to sustainable production of winter wheat in drylands of Northwest China.

Effect of different doses of nitrogen fertilizer on growth and yield of T. Aman rice variety (BRRI Hybrid Dhan4)

Effect of different doses of nitrogen fertilizer on growth and yield of T. Aman rice variety (BRRI Hybrid Dhan4)

Response of Different Doses of Nitrogen Fertilizer on Growth and Yield of KangKong (Ipomoea reptans poir)

The experiment was conducted at the Agricultural Research Field of International University of Business Agriculture and Technology, Dhaka during the period from August to October 2020 to investigate the response of different doses of nitrogen fertilizer on the growth and yield of Kangkong (Ipomoea reptans poir). The experiment consisted of four nitrogen fertilizer levels viz. T0: no fertilizer, T1: 60 kg nitrogen fertilizer, T2: 80 kg nitrogen fertilizer, and T3: 100 kg nitrogen fertilizer per hectare. The result revealed that plant height, number of leaves per plant, number of branches per plant, fresh weight per plant, dry weight per plant, root length per plant, fresh weight of root per plant, dry weight of root per plant, yield per plot and yield per hectare grown under different doses of nitrogen fertilizer viz. control (T0), 60 kg N per hectare (T1), 80 kg N per hectare (T2), showed significant reduction than those grown in 100 kg N per hectare (T3). The experiment was conducted following Randomized Complete Block Design (RCBD) with four replications. The application of different doses of nitrogen significantly influences the growth and yield of Kangkong. The maximum plant height, number of leaves, number of branches, fresh weight per plant, root length was obtained from T3 treatment while the minimum was found from the control treatment (T0) at 60 days after sowing. The highest yield (17.87 t/ha) was performed from the treatment T3 and the lowest yield (11.83t/ha) was obtained from the control treatment where no nitrogen was used.

The Effects of Different Doses of Nitrogen Fertilizer on Yield, Yield Components and Fiber Quality Properties in Second Crop Cotton in Aydın Province, TURKEY

Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisinin 17. Cilt 2. Sayısında yer alan 'Çopul, S, Gençsoylu, İ. (2020). Aydın İli İkinci Ürün Pamukta (Gossypium hirsutum L.) Farklı Azot Dozlarının Verim, Verim Komponentleri ve Lif Kalite Özellikleri Üzerine Etkisi. Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisİ, 17 (2), 271-279. DOI: 10.25308/aduziraat.770934' künyeli makalede, makalenin 276. sayfasında yer alan Çizelge 9 sehven yanlış verilmiş olup ekli dosyada verildiği şekilde düzeltilmiştir.

The effect of meteorological conditions and nitrogen fertilizers on biological productivity of the spring triticale variety ‘Timiryazevskaya 42’

The current paper has presented the study of the effect of different doses and terms of top-dressing with nitrogen fertilizers, in the form of ammonium nitrate, on the growth, development and biological productivity of the new spring triticale variety ‘Timiryazevskaya 42’. The study was carried out in 2015–2018 in the field trial laid down at the Field Experimental Station of the RSAU-Moscow Agricultural Academy named after K. A. Timiryazev (Moscow). It was identified that, depending on the weather conditions of the vegetation period, different doses of nitrogen fertilizers at different times had a different degree of positive effect on the indicators of the variety yield elements. When applying top-dressing, the variety ‘Timiryazevskaya 42’ showed high potential of its biological productivity, which reached 15.6 t/ha under optimal conditions. There has been established a high correlation between CHF (coefficient of head filling) and biological productivity (r = 0.97), which allows predicting in the middle of the vegetation period which variant of the trial will give the highest productivity. The biological productivity of the studied variety has been most influenced by productive tillering (r = 0.80), number and weight of grain per head (r = 0.71; r = 0.66, respectively), and there was a slight effect of 1000 grain weight (r = 0.64). The value of correlation between ‘length of head’ and biological productivity ranged from 0.54 in 2016 to 0.98 in 2018 for different variants of the trial, which indicated a strong effect of different meteorological conditions of the variety cultivation on the change of length of its head.

Nutrient production in pastures of Triticale BRS Saturno submitted to different levels of nitrogen in topdressing

Pastures are a primary source of feed for ruminants, which convert fibrous plants into nutritionally valuable foods for humans, such as meat and milk. However, it is important to understand the nutrient content of different fodder crops for ruminants and its effect on meat, milk, and milk products. We aimed to evaluate the effect of nitrogen fertilizer doses in topdressing on nutrient production in pastures of Triticale BRS Saturno. The experimental design was a randomized block with five replications. Descriptive statistics of yields per hectare were determined, and a simple linear regression was carried out at the level of 5% significance. The different nitrogen topdressing rates (0, 50, and 100 kg N ha-1) influenced the production (P < 0.05) of dry matter, total carbohydrates, neutral detergent fiber, acid detergent fiber, crude protein, soluble protein, insoluble protein in neutral and acid detergent, protein degradability, ether extract, linoleic and linolenic fatty acids, neutral detergent fiber digestibility after incubation for 24, 30, and 48 h, and the neutral detergent fiber degradation rate. The different doses of nitrogen fertilizer in topdressing in the form of urea increased nutrient production in pastures of Triticale BRS Saturno, mainly in relation to total carbohydrates and neutral and acid detergent fiber. To a lesser extent, it also significantly interfered with the production of nitrogenous constituents and fatty acids.

Influence of application of nitrogen doses on the post-harvest quality of cucumber

The conditions of cultivation and the management of fertilization influence the productivity and the post-harvest quality of cucumbers in an expressive way. In this sense, the aim of this study is to evaluate the physical, chemical and sensorial post-harvest quality of cucumbers for canning purposes submitted to different doses of nitrogen fertilization. The experiment was carried out in a greenhouse at the Goiano Federal Institute (IF Goiano), campus Urutaí and After harvest, the material was sent to the food technology laboratory located in the campus. The soil of the area is classified as Red Latosol according he cucumber cultivar used was the Cucumis sativus L. Kybria F1 hybrid, most suitable for the processing of canned foods. The experimental design was randomized blocks and five treatments (nitrogen doses 0, 50, 100, 150 and 200 kg ha-1), and four replications. The physical parameters fruit length and diameter, fruit fresh matter, production per plant, titratable acidity (TA), pH, soluble solids (SS), moisture, ash content, and SS/TA ratio were evaluated. A sensory analysis was performed using acceptance and ordering-preference tests, in addition to an instrumental evaluation of texture. The application of different doses of nitrogen to cucumber in a protected environment influenced the production per plant and the physical-chemical characteristics of the fruits. However, the sensory quality was not affected. The doses 100 and 150 kg ha-1 of nitrogen is recommended for the production of canned cucumber

Produtividade do milho associado a inoculação com Azospirillum brasilense e diferentes doses de adubação nitrogenada

Embora a adubação química nitrogenada seja responsável pelo aumento da produtividade da cultura do milho, sua aplicação também e responsável pelo aumento do custo de produção e por promover uma serie de riscos ambientais. Uma alternativa para esse problema e a fixação biológica de nitrogênio. Este trabalho tem como objetivo a avalição da eficiência da inoculação com Azospirillum brasilense na cultura do milho associada a diferentes doses de adubação nitrogenada em cobertura. O experimento foi realizado na área experimental da UniEvangélica, com os tratamentos: testemunha com 100% da cobertura; inoculação + 85% da cobertura; inoculação + 85% de cobertura e aplicação em cobertura de A. brasilense; inoculação + 100% da cobertura. Foram avaliados parâmetros morfológicos e a produtividade. Os resultados foram submetidos à análise de variância, e quando ocorreram diferenças significativas, aplicou o teste de médias de Tukey (5% de probabilidade). A inoculação com A. brasilense e redução de 15% da adubação nitrogenada em cobertura, apresentou eficiência como promotora de crescimento e desenvolvimento vegetativo, efeito significativo sobre a altura de plantas e na massa verde e seca da inflorescência. A inoculação com A. brasilense não apresentou resultados significativos na manutenção da produtividade frente a redução da adubação nitrogenada, com redução de 21% na produtividade.

The Effects of Different Doses of Nitrogen Fertilizer on Yield, Yield Components and Fiber Quality Properties in Second Crop Cotton in Aydın Province, TURKEY

Bu çalışma, 2016 ve 2017 yıllarında, ikinci ürün pamuk üretim sezonunda, farklı azot dozlarının (0, 70, 140 ve 210 kg N/ha); verim, verim komponentleri ve lif kalite özellikleri üzerine etkisini saptamak amacıyla Nazilli Pamuk Araştırma Enstitüsü deneme arazisinde yürütülmüştür. Denemede materyal olarak 4 farklı pamuk çeşidi (Özbek 105, Gloria, Julia ve Lydia) kullanılmıştır. Çalışmada, azot dozu miktarındaki artışın, kütlü pamuk verimini belirli bir noktaya kadar arttırdığı belirlenmiştir. Yapılan istatistiksel analizler sonucunda, kütlü pamuk verimi bakımından en ekonomik azot dozunun, 150 kg N/ha olduğu belirlenmiştir. Azot dozu miktarındaki artış ile 100 tohum ağırlığı (g), bitki boyu (cm), koza sayısı (adet/bitki), lif inceliği (mic) ve lif uzunluğu (mm) değerlerinin arttığı; çırçır randımanının (%) ise azaldığı belirlenmiştir. Ayrıca, azot dozlarının, lif kopma dayanıklılığı (g/tex) ve üniformite indeksi (%) değerleri üzerinde ise istatistiksel açıdan önemli bir etkisinin olmadığı tespit edilmiştir.

The Effects of Different Doses of Nitrogen Fertilizer on Population Dynamics of Pests and Natural Enemies in Second Crop Cotton of Aydın Province, TURKEY

Bu çalışma, 2015-2017 yılları arasında, ikinci ürün pamuk üretim sezonunda, Aydın İli Nazilli Pamuk Araştırma Enstitüsü Müdürlüğü deneme arazisinde yürütülmüştür. Çalışmada, farklı azot dozlarının (0, 70, 140 ve 210 kg N ha-1), sokucu-emiciler ve doğal düşmanlar üzerine etkilerinin belirlenmesi amaçlanmıştır. Çalışmada, Özbek 105, Gloria, Julia ve Lydia pamuk çeşitleri kullanılmıştır. Haftalık periyotlarla yapılan zararlı gözlemleri sonucunda; Aphis gossypii Glover (Hemiptera: Aphididae), Empoasca decipiens Paoli + Asymmetrasca decedens (Paoli) (Hemiptera: Cicadellidae), Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), Thrips tabaci Lindeman (Thysanoptera: Thripidae) ve Tetranychus urticae Koch (Acarina: Tetranychidae) türlerinin farklı azot dozlarına ve pamuk çeşitlerine göre popülasyon değişimleri tespit edilmiştir. Uygulanan azot dozu miktarındaki artış, tüm pamuk çeşitlerinde, zararlıların popülasyon yoğunluğunun artmasına neden olmuştur. Predatör türler olarak; Aeolothrips spp. (Thysanoptera: Aeolothripidae), Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae), Campylomma diversicornis Reuter (Hemiptera: Miridae), Nabis spp. (Hemiptera: Nabidae), Orius spp. (Hemiptera: Anthocoridae), Adonia variegata (Goeze) (Coleoptera: Coccinellidae), Coccinella septempunctata Linnaeus (Coleoptera: Coccinellidae), Coccinella undecimpunctata Linnaeus (Col.: Coccinellidae) ve Scymnus spp. (Coleoptera: Coccinellidae) tespit edilmiştir. Çalışmadan elde edilen veriler ışığında, gübrelemenin zararlılar ile mücadelede önemi ortaya konulmuştur. Ayrıca, azot dozlarının, önerilen dozlarda (150 kg N ha-1) uygulanması ile zararlı türlerinin popülasyon yoğunluğunun düştüğü ve bu durumun, ekonomik ve ekolojik pamuk üretimine yardımcı olabileceği belirlenmiştir.

Appraisal of different doses of nitrogen fertilizer on growth and yield of eggplant (Solanum melongena L.)

Nitrogenous fertilizer could improve the growth, yield and yield contributing characters of eggplant. The present investigation was aimed to find out the effects of different doses of nitrogen fertilizer on growth and yield of eggplant (Solanum melongena L.) which was conducted at Noakhali Science and Technology University during November, 2018 to March, 2019. The experiment comprises on eggplant local variety named ‘Tal begun’. There were four treatments of urea viz., 0, 12, 21 and 30 g urea pot-1 and the experiment were laid out in completely randomized design (CRD) with three replications. Different parameters were undertaken for the study like plant height (cm), number of leaves per plant, number of branches per plant, number of flowers per plant, number of fruits per plant, individual fruit weight (g). The variety showed significant variation for different doses. Among all treatments, 30 g urea pot-1 showed highest vegetative characteristics such as plant height (49.67 cm), number of leaves per plant (32.67), number of branches per plant (7.33) at 60 DAT and lowest vegetative characteristics was found from 0 g urea pot-1. On the other hand, the application of 21 g urea pot-1 showed medium vegetative characteristics and highest reproductive characteristics such as number of flowers per plant (6.67), number of fruits per plant (6.67), individual fruit weight (138.67 g). Therefore, the results showed that, nitrogen fertilizer strongly influenced vegetative and reproductive characteristics of eggplant. The findings of this study suggested that 21 g urea pot-1 performed the best and it will be suitable for eggplant production.

Maximize Growth and Productivity of Rice by Using N2-Fixing Anabaena oryzae and Spirulina platensis Extract

This study highlights the role of both inoculation with N2-Fixing cyanobacterium Anabaena oryzae and spraying with cyanobacterium Spirulina platensis extract and their combinations on growth and productivity of the two rice varieties (Sakha108 and Giza178) under different doses of nitrogen fertilizers. The experiment was laid out in a split - plot design with four replications; the two rice varieties were located in the main plots and fertilizer treatments were placed in the sub-plots. Chlorophyll content of flag leaf, plant height, number of panicle/m2 and panicle length, number of filled grain/panicle, one thousand grain weight, straw and grain yields (t/ha) were measured. Bioactive compounds and amino acid production of Spirulina were determined by GC–MC and amino acid analyzer, respectively. The results show Spirulina extract contains eighteen amino acid and several bioactive molecules and application of mixture Anabaena oryzae and Spirulina platensis extract with 75% recommended dose of nitrogen or recommended dose of N fertilizer gave nearly the highest value of growth characters, grain yield and yield components compared with other treatments in both seasons. This study describes the role of Anabaena oryzae and spraying with Spirulina platensis extract through plant-microbe interactions and the effect of this reaction on the growth and productivity of rice crop.

Maximizing growth and productivity of onion (Allium cepa L.) by Spirulina platensis extract and nitrogen-fixing endophyte Pseudomonas stutzeri.

The study focuses on the impact of foliar spraying cyanobacterium Spirulina platensis extract and the inoculation with the endophyte N2-fixing Pseudomonas stutzeri, and their mixture in the presence of different nitrogen doses on growth and yield of onion under field conditions. Bioactive compounds of Spirulina and Pseudomonas were analyzed by GC-MC and amino acid production of Spirulina by the amino acid analyzer. Hydrogen cyanide (HCN), indole acetic acid (IAA), ammonia (NH3), pectinase activity, and N2-fixation of Pseudomonas were measured. Plant height (cm), leaf length (cm), number of green leaves, bulb diameter (cm), fresh and dry weight of plant (g), chlorophyll a, b of leaves, bulb weight (g), marketable bulb yield (t. ha-1), cull bulb weight (t. ha-1), total bulb yield (t. ha-1), bulb diameter (cm), total soluble solids (TSS%), dry matter content (DM%), evaluation of storage behavior, and economic feasibility were estimated. Spirulina extract has several bioactive compounds. Pseudomonas can produce HCN, NH3, IAA, pectinase, and nitrogen fixation. The application of mixture with recommended dose of nitrogen increases the onion plant parameters, marketable yield, total bulb yield, bulb weight, bulb diameter, TSS%, DM%, net return, benefit-cost ratio (B:C), lowest cumulative weight loss% of bulbs during storage, and reduce culls weight compared with other treatments in two seasons. Application of S. platensis extract and inoculation with endophyte nitrogen-fixing P. stutzeri enhance the growth and productivity of the onion under different doses of nitrogen fertilizer.

Inoculation of bacterial consortium increases rice yield (Oryza sativa L.) reducing applications of nitrogen fertilizer in San Martin region, Peru

Rice feeds more than 50% of the population worldwide, representing a great energy contribution in low-income families. The exaggerated use of synthetic chemical fertilizers to maintain high levels of yield causes alterations in the physical, chemical and biological quality of the soils. A sustainable alternative is the use of beneficial microorganisms that promote plant growth in crops. The objective of the study was to isolate and evaluate the Plant Growth Promoting (PGP) traits of rhizospheric rice bacteria in soils of the San Martin region, evaluate the effect of promoting growth in rice under pot experiments conditions and finally evaluate the effect of selected strains on the yield under different doses of nitrogen fertilizer under field conditions. Initially, 27 strains were selected for their diazotrophic characteristics and characterized by PGP traits. Through a multivariate analysis of main components, five strains were selected and evaluated in pot experiments. In this stage, the rice seeds were inoculated with the five selected strains at the rate of 109 CFU g−1 and were evaluated at 135 days. The strains showed that the parameters such as Shoot Dry Weight (SDW), tillering and grain quality were superior and even similar between inoculated treatments receiving doses of 50% Nitrogen (N) (75 kg N ha−1) and treatment receiving full dose (150 kg of N ha−1). For the field experiments, Burkholderia ubonensis la3c3, Burkholderia vietnamiensis la1a4 and Citrobacter bitternis p9a3m were selected, which were inoculated in a consortium at a rate of 109 CFU mL−1 in the nursery stage and at the time of transplantation. Grain yield was higher but not significant between 2.5 and 13.5% in inoculated treatments receiving 75% and 100% (150 kg N ha−1) of the nitrogen fertilizer dose compared to the treatment without inoculation and without fertilization. Grain quality was superior in inoculated treatments versus non-inoculated treatments, reaching specific increases of 32.8% (N), 45.5% (P) and 27.9% (K) in inoculated treatments receiving low doses of N fertilizer (25%) versus treatment receive a full dose of fertilizer, also a significant increase of 2.5% in the percentage of whole grain, with respect to mill quality. The rentability (14.7–88.6%) and the utility (17.7–94.1%) were also higher in inoculated treatments. It is concluded that the use of selected native bacterial consortiums reduces the use of nitrogen fertilizer by up to 25%, increasing the productivity of rice cultivation in the San Martín region.

Поживний режим чорнозему вилугуваного та продуктивність зернової ланки за тривалого удобрення сівозміни

Goal. To study the effect of legumes predecessors and doses of nitrogen fertilizers on the nutritive regime of leached chernozem in agrocenose of winter wheat as well as grain chain productivity at long-term (over 50 years) application of different systems of organomineral fertilizing in conventional and alternative crop rotations. Methods. Long-term field and analytical. Results. Changes were fixed of the nutrient status of leached chernozem in agrocenose of winter wheat and productivity of grain link at the long-term application of organic and mineral fertilizers in crop rotation, as well as at introduction of different doses of nitrogen fertilizers under winter wheat, and its further cultivation after different legumes predecessors. The data were got concerning the content of mobile forms of nutrients in leached chernozem and their impact on the productivity of grain link. It was established that the fund of mineral nitrogen in soil depended mainly on the doses of nitrogen fertilizers which were entered under winter wheat, as well as on the legumes predecessor. The reserves of mobile phosphorus and potassium in leached chernozem depended on the duration and background of organic and mineral fertilizers which were used in crop rotation. Conclusions. The best conditions of the nitric mode of leached chernozem in agrocenose of winter wheat were formed for its cultivation after clover with the use of mineral fertilizers in the dose of N60P60K60. Fund of mobile phosphorus in the soil in agrocenose of winter wheat was formed mainly due to long-term (over 50 years) application of organic and mineral fertilizers in crop rotation. An annual application of 64 kg pf phosphorus (N43P43K43 + 8,3 t of manure for 1 ha of the area of crop rotation) with fertilizers (for 1 ha of crop rotation) had formed a high level of availability of soil phosphorus in the range of 309–323 mg/kg. That exceeded the control without fertilizer on 133–138 mg/kg of soil. Such a fertilizing system stabilized in crop rotation the content of mobile potassium in the soil at the level of 102–123 mg/kg. That corresponded to the average level of benefit and exceeded the control without fertilizers on 29–43 mg/kg of soil. The highest productivity of the grain crop rotation was achieved at the use of clover as the predecessor and long-term (50 years) entering of N43P43K43 + 8,3 tons of manure (or by-products) per 1 ha of crop rotation: yield of fodder units — 8.02 t/ha, the yield of grain — 3,33 t/ha of the link of crop rotation.