Efficiency Of New Defoliants In The CottonProduction

摘要

.In the experimental set-up of the influence of various agrotechnical measures on defoliation efficiency of the Navruz variety, the best results in the Tashkent province were received under the irrigation rates of 65-65-60% from FC, fertilizers rates of N150P100K75 kg ha~(-1) and both plant densities (90-100 h 110-120 thousand plants ha~(-1)) when applying the defoliants UzDEF with the rate of 7.0 1 ha~(-1) and Auguron-extra 0.15 1 ha~(-1). Under application of fertilizers with the rate of N200P140K100 kg ha~(-1), in the set-up with a theoretical plant density of 110-120 thousand plants ha~(-1) and application of UzDEF with the rate of 8.0 1 ha~(-1) and Auguron-extra 0.20 1 ha~(-1), and the set-up with a theoretical plant density of 90-100 thousand plants ha~(-1) application of UzDEF 7.0 and Auguron-extra 0.15 1 ha~(-1) the highest results on defoliation, ripening of cotton bolls and yields have been obtained.The best results have been obtained when applying the irrigation rates of 75-75-65% from FC, in the experimental set-up of fertilizers application rates of N2ooPi4oKioo kg ha~(-1) and plant density, application of UzDEF with the rate of 8.0 1 ha~(-1) and Auguron-extra 0.20 1 ha~(-1), in the experimental set-up with a theoretical plant density of 110-120 thousand plants ha~(-1).