The impact of agrotechnical factors on the productivity of cotton in the context of optimization

Termiz Institute of Agrotechnology and Innovative Development, Yangiabad neighborhood, Termiz district, Surkhandarya region, 191200, Uzbekistan

^* Corresponding author: dilshodjumanov31@gmail.com

Abstract

In the conducted field experiment, three different densities of cotton bushes (80, 100 and 120,000 per 1 ha, as well as 7.2, 9.0 and 10.8 plants per 1 running meter, respectively), two types of irrigation depending on the limited field moisture. the power of the soil (NPK) regime (70-70-60 and 75-75-60%, as well as the irrigation regime 2-3-0 and 2-4-0, respectively) and the mutual proportions of fertilizers (NPK) in two standards (1:0.7:0.5 and 1:1:0.5). The annual fertilizer rates were: N200 P140 and K100 and N200 P200 and K100 kg/ha. At 70-70-60% irrigation regime, depending on the density of the bush and the ratio of fertilizers, the average yield was 35.7-40.9 t/ha, and at 75-75-60% irrigation regime, the average yield by options was 33.2-36.4 q/ha. It was found that the microneuron index of cotton fiber harvested from the experimental options was 4.3-4.5, and the microneuron index of cotton fiber harvested from the variants irrigated in the 70-70-60% mode was slightly higher than in the irrigation mode 75-75-60%. The highest efficiency cotton was irrigated in the mode of 70-70-60%, with an average of 100,000 bushels per hectare and fertilizers were applied in the ratio of 1:1:0.5, yield was 40.9 t/ha and 32.2% yield was achieved.