Abstract
In a long field experiment on common black soil, the influence of various fertilization systems and presowing bacterization of seeds on the activity of symbiotic nitrogen fixation in lucerne agrocenoses and crop productivity was studied. Stimulation of the process of fixation of atmospheric nitrogen was observed when mineral fertilizers were used in the doses not exceeding N60P60K60, when they were introduced in the year of sowing. High rates of nitrogenase activity were noted in conditions of aftereffect of manure, compost, organic mineral fertilizer (manure + N30P30K30), as well as systematic use of crop residues in the crop rotation. The plant mass in above variants was characterized by high protein content. At the same time, the greatest influence on protein synthesis was provided by the use of a microbial preparation. The combination of ecologically acceptable agricultural backgrounds with presowing bacterization of lucerne seeds ensured the obtaining of parameters of crop productivity.
Highlights
Medic or blue alfalfa (Medicago sativa L.) is the main bean culture in the feed conveyor system
The purpose of our work is to study the influence of agricultural backgrounds in the cultivation of alfalfa on the activity of the process of symbiotic nitrogen fixation and culture productivity
Indicators of nitrogen fixation activity in rhizospheric soil of plants are proposed to use as a kind of indicator of the expediency of nitrogen fertilizer rates [6]
Summary
Medic or blue alfalfa (Medicago sativa L.) is the main bean culture in the feed conveyor system. The benefits of alfalfa to other herbs are high yields over several years, feed value, adaptation to different soil-climatic conditions. Under different crop fertilization systems in crop rotation, the productivity of nitrogen fixation under alfalfa can be significantly changed, including towards decreasing parameters. In this regard, the purpose of our work is to study the influence of agricultural backgrounds in the cultivation of alfalfa on the activity of the process of symbiotic nitrogen fixation and culture productivity
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