Nitrogen use by plants and nitrogen flows after application of standard and biomodified nitrogen fertilizers on barley

Abstract

The aim of our study was to assess the efficiency of application of biomodified nitrogen fertilizers for barley, to reveal the sources of nitrogen used for biomass formation with the use of the 15N stable isotope, and to study nitrogen flows in the system of fertilizers–soil–plants–atmosphere. We demonstrated in a model experiment the ability of the plant growth-promoting bacteria Bacillus subtilis Ch-13 to move from the granules of mineral fertilizers to plant roots and to colonize them effectively. The effectiveness of biomodified nitrogen fertilizers for barley, Nur variety, was assessed in a microfield trial. After the application of biomodified nitrogen fertilizers, the accumulation of 15N in the plants increased by 2–5 %, its incorporation in the soil decreased and gaseous losses were decreased by 7 % as compared with the use of the usual forms of fertilizers. The application of biomodified nitrogen fertilizers can be used in agricultural practice as a novel technology to regulate nitrogen flows in the system of fertilizers–soil–plants–atmosphere.

Effects of Apatite Concentrate in Combination with Phosphate-Solubilizing Microorganisms on the Yield of Ryegrass Cultivar Izorskiy

“…Recent results [21] provide an example of more colonization of wheat plants root zone by several PMB genera (Arthrobacter, Bacillus, Massilia, et cetera) in response to organic acids present in root exudates. Additionally, for high level growth-promoting bacteria Bacillus velezensis BS89 (in model experiments on barley of Nur variety), the ability to move from mineral fertilizer granules to plant roots and colonize them effectively was also previously reported [16]. On the basis of these data, we then propose that the strains consortiums identified here play a significant role for improved P availability through root-microbe interactions.…”

“…Inoculation of various crops (potatoes, spring and winter wheat, barley, sunflower, cabbage, carrots, and strawberry) with B. velezensis BS89 increased the yield from 12 to 40% [15,16].…”

AGRICULTURAL MICROBIOLOGY AND SYMBIOGENETICS: SYNTHESIS OF CLASSICAL IDEAS AND CONSTRUCTION OF HIGHLY PRODUCTIVE AGROCENOSES (review)

“…Важное условие развития экологически безопасных агротехнологийповышение эффективности симбиотрофного питания растений, включая усвоение труднорастворимых фосфатов микоризными грибами и ризосферными бактериями (49). В связи с этим представляет интерес разработка комбинированных препаратов, содержащих минеральные удобрения и микроорганизмы, которые позволяют растениям максимально полно использовать вносимые в почву соединения азота и фосфора, сокращая накопление вредных продуктов их трансформации (50).…”

Biological nitrogen contribution to the increased forage value of soybean grains in the Non-Chernozem zone of Russia

“…That ensures the maturation of such varieties in 100-120 days, thereby reducing the risk of crop losses from adverse weather conditions in autumn period [4,5]. At the same time, the factors such as efficient nature management, energy saving (due to symbiotic nitrogen fixation) and soil fertility increase should be considered along with a full crop rotation [6,7].…”