Abstract
This article presents the results of studies conducted in 2021-2022 on dark chestnut soils of Central Kazakhstan to study the effect of mineral fertilizers on the yield of peas of the Aksaysky Usatiy 55 variety and the dynamics of the main nutrients of the soil, such as nitrate nitrogen, mobile phosphorus, exchange potassium during the pea growing season by phases: shoots; budding and flowering. Sowing of the above crop was carried out by three different seeding rates (0.8; 1.0; 1.2 million pieces of seeds per 1 ha), at three different sowing dates (May 11; 15; 20) and on three backgrounds: control (without fertilizers); P 82 kg/ha a.s.; P 82 kg/ha a.s. + N 17 kg/ha a.s.
The content of nitrate nitrogen in the soil before sowing peas according to all seeding standards was from very low to high, depending on the sowing period and climatic conditions. The introduction of ammophous increased the content of nitrate nitrogen in the soil for all terms and norms of sowing peas: up to 16.6-17.5 mg/kg on variants with a sowing period of May 11 and up to 28.1-37.5 mg/kg of soil on variants with a later sowing period. Upon addition of more ammonium sulphate, respectively, further increased the content of nitrate nitrogen in the soil - up to 40.5 mg / kg of soil. The content of mobile phosphorus in the soil before sowing peas in the control variants (without fertilizers) was very low and low at the level of 8.8-23.5 mg/kg. The introduction of ammophous as a phosphorus-containing fertilizer increased the content of mobile phosphorus in the soil to 38.1 mg/ kg of soil, which corresponds to increased security.
01 Introduction
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02 References
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