INFLUENCE OF NEW ORGANIC FERTILIZERS ON THE GROWTH, DEVELOPMENT AND YIELD OF COTTON AND SOIL PHOSPHATASE ACTIVITY

Abstract

The article provides data on the effect of new organic fertilizers on the growth, development and yield of cotton and the phosphatase activity of the soil when growing organic cotton raw materials in the conditions of Uzbekistan. Based on the requirements of organic farming, plant growth stimulants and biofertilizers developed by biological and organic methods were used when cultivating cotton. In experiments when spraying cotton leaves with solutions of biofertilizers (Tandem, Maltamin and Microvac), an increase in yield was noted by 0.28-0.73 t ha^-1 compared to the control, and when treating the soil with microbiological biofertilizers MBU-1, MBU-2 - by 0 .03-0.97 t ha^-1.

The experiments also showed that MBU based on phosphate-solubilizing microorganisms has high phosphatase activity. The phosphatase activity of the experimental plots with added MBU was 622.3 mg p-nitrophenol kg-1 of soil h-1 on the 28th day after application, while the initial value of soil activity was 243.2, which indicates the effectiveness of MBU in increasing the phosphatase activity of soil .