INFLUENCE OF AGROTECHNOLOGICAL FACTORS ON COTTON YIELD
Keywords:
Fertilization ratio, watering regime, bush thickness, fertility, the quality, limited field moisture capacity, wet capacity, gross, general, mobile, nitrogen, phosphorus, potassium, humus, economic efficiency, profitability.Abstract
In the field experiment, three different thicknesses of cotton bushes (80; 100 and 120 thousand per hectare, as well as 7.2; 9.0 and 10.8 plants per 1 pogonometer, respectively), two different irrigations relative to the limited field moisture capacity of the soil (ChDNS) regime (70-70-60 and 75-75-60%, as well as the irrigation regime 2-3-0 and 2-4-0, respectively) and the ratio of the two norms of fertilizer (NPK) (1: 0.7: 0, 5 and 1: 1: 0.5) were studied. The annual norm of fertilizers was: N200 P140 and K100 and N200 R200 and K100 kg. It was taken into account that the yield of cotton grown under conditions where the irrigation regime was 70-70-60% relative to the soil ChDNS (limited field moisture capacity) was higher in the years of experiments than the yield in the 75-75-60% regime irrigated variants. In the 70-70-60% irrigation regime, the average yield was 35.7-40.9 ts / ha, depending on the thickness of the bush and the ratio of fertilizers, while in the 75-75-60% irrigation regime the yield was 33.2-36.4 on average. ts / ha. The micronair index of fiber in cotton harvested from experimental variants was 4.3-4.5, and the micronair index of cotton fiber harvested from 70-70-60% of irrigated variants was slightly higher than the 75-75-60% irrigation regime.
