Optimizing Defoliation to Enhance Yield in Medium Fiber Cotton Varieties
DOI:
https://doi.org/10.51699/ijbea.v3i3.3536Keywords:
Cotton varieties, S-8290, S-6775, Defoliation, Fergana regionAbstract
This study investigates the growth and yield characteristics of S-8290 and S-6775 cotton varieties in the grassland soils of the Fergana region. Despite the extensive cultivation of these varieties, detailed comparative growth data under specific defoliation conditions are sparse. The research aims to fill this gap by evaluating plant height, leaf number, and bud development under two defoliation backgrounds. In S-8290, with 50-60% cotton opening, the plants averaged 92.7 cm in height, 33.3 leaves per stem, and 12.7 buds, with 55.5% opened and 1.6% half-opened. For S-6775, pre-defoliation plants were 96.3 cm tall with 36.0 leaves and 12.5 buds, of which 33.9% were opened and 2.5% half-opened. Under 50-60% defoliation, S-6775 plants averaged 96.8 cm in height, 36.8 leaves, and 12.3 buds, with 53.6% opened and 1.9% half-opened. These findings provide valuable insights into the optimal defoliation conditions to maximize yield and quality in these cotton varieties.
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