Abstract
The article presents the results of a study of the influence of different amounts of phosphorus fertilizers applied for different varieties of alfalfa on the total supply of nitrogen and the chemical composition of alfalfa varieties at the station of the department of “Forage and oilseeds” of the Kazakh Research Institute of Agriculture and Plant Growing of the Karasai district of the Almaty region on irrigated light -chestnut soil. Organic residues from the alfalfa crop contribute to the accumulation of total nitrogen in the soil. For example, it can be observed that the difference in total nitrogen in the 0-20 cm layer of the control variant of the NS Alpha variety in light black-brown soil increased by 0.004%, and in the 20-40 cm layer - by 0.007%. layer cm. It was found that for the Banat BC variety this indicator increased by 0.003 and 0.008%, for the Nera variety by 0.001 and 0.010%, and for the Kokorai variety by 0.003 and 0.005%. It can be seen that the amount of total nitrogen in the soil increased significantly in the fertilized variants of all varieties as the amount of phosphorus fertilizers increased compared to the control variant.
Depending on the experiment, alfalfa hay had a high nitrogen and potassium content, and the phosphorus content was 4-9 times lower. It has been observed that the amount of nutrients in alfalfa crops is higher when phosphorus fertilizers are used. Of course, first of all, the amount of phosphorus increased. Its size increased from 0.37 to 0.61%. The application of phosphorus fertilizers not only increased the amount of phosphorus, but also significantly increased the amount of nitrogen in the plant. However, there was no significant effect on the increase in the amount of potassium in the plant.
01 Introduction
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02 References
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