Open AccessNitrogen-fixing ability of perennial leguminous grasses in various environmental conditions of the Western Siberia
Author(s) -
А Ф Степанов,
С П Чибис,
S. Yu Khramov,
Светлана Николаевна Александрова,
V. V. Khristich
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/723/2/022020
Subject(s) - chernozem , perennial plant , agronomy , nitrogen fixation , nitrogen , steppe , biology , environmental science , soil water , ecology , chemistry , organic chemistry
The goal of the research was to determine the nitrogen-fixing ability of perennial leguminous grasses and their use of biological nitrogen to form the crop of fodder in different environmental conditions of Western Siberia. The nitrogen-fixation coefficient (C f ) was determined by the method of comparison with a non-leguminous plant. It has been established that in the southern forest-steppe on meadow-chernozem soil biological nitrogen is used more efficiently using Medicago varia, Galega orientalis, Onobrychis arenaria и Astragalus galegiformis . Plants of these species fix up to 233–379 kg/ha of air nitrogen during the growing season, C f is equal to 0.56–0.78. The accumulation of symbiotic nitrogen by leguminous grasses is 1.1–4.6 times less in the northern forest-steppe in solonetz fine than in meadow-chernozem soil. Medicago varia at solonetz forms due to biological nitrogen to 58% of yield and Astragalus galegiformis only 10-22%.