THE ACCUMULATION OF ELEMENTS OF A FOOD LEGUME USED AS A PRECURSOR
2020
Chadaev, I. M. | Gurin, A. G.
The article presents the data of three-year studies on the study of the characteristics of the accumulation of nutrients by various leguminous crops grown for grain and for siderate. It is established that the number of food elements depends mainly on the mass of stubble-root residues and the above-ground mass that entered the soil during their incorporation. The content of easily hydrolyzed nitrogen was higher after legumes cultivated for siderate, relative to variants where legumes were cultivated for grain. The nitrogen content in the soil after peas for grain ranged over the years from 108.4 to 126.4 mg/kg in the soil layer 0-10 cm, and from 93.2 to 113.5 mg/kg in the layer 10-20 cm. When cultivating peas for siderate, the amount of easily hydrolyzed nitrogen was slightly more than 121.1-129.3 mg/kg in the soil layer 0-10 cm and 110.8-115.2 mg/kg in the layer 10-20 cm. cultivated on siderate 128.7-138.9 mg/kg in a layer of 0-10 cm and 117.1-126.7 mg/kg in a layer of 10-20 cm. Green manure crops on the ground 5-6 times exceeds the mass of the stubble- root residue, plow under in the soil after harvest of legumes for grain. This mass was accumulated nitrogen 143.6-193.7 kg/ha, mobile phosphorus 37.8 -59.2 kg/ha, exchange potassium 67.9-112.8 kg/ha. Maximum number of nutrients was accumulated biomass Lupin 365.7 kg/ha, which is 32.8 % more than when cultivating vico-oat mixture on siderate and 22.9% more than when cultivating peas
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