INFLUENCE OF BIOORGANIC FERTILIZERS ON THE FERTILITY OF DARK CHESTNUT SOIL AND THE PRODUCTIVITY OF WATERMELON IN THE SOUTHEAST OF KAZAKHSTAN

Abstract

In this article, the study of the effect of bioorganic fertilizers on the fertility of dark brown soils in the conditions of southeastern Kazakhstan was determined by the level of nutrients (NPK) in the soils of the variants in which various bioorganic fertilizers were used, as well as by the effect on the yield of watermelon, overall productivity indicators and the qualitative composition of the experimental variants. According to the research results, it was found that the studied fields of bioorganic fertilizers have a positive effect on soil fertility indicators. It was found that the maximum values of mobile forms of macronutrients accumulate when manure is fed into the soil in the amount of 40 t/ ha, vermicompost in the amount of 15 t / ha and bird droppings in the amount of 5.0 t / ha. Bio-organic fertilizers have increased the yield of watermelon culture. Compared to the control version, productivity increased from 15.6% to 34.34%. In the biological fertilizer system, the quality indicators of watermelon culture have improved, the content of dry substances in fruits, total sugar content and ascorbic acid have increased.