Effect of Different Application Methods of Humic Acid on Cotton Yield, Plant Growth and Fiber Quality

Abstract

This study was carried out to determine the effect of different humic acid application methods on cotton yield, plant development and fiber quality. The study was conducted as randomized complete block design with four replications at the Field Crops Department experiment. area, Faculty of Agriculture. Siirt University. Stoneville 468 cotton variety and TKI Humas humic, acid were used as material Seven different humic acid applications were performed. The results showed that the seed cotton yield, fiber yield, number of boll per plant and boll seed cotton weight affected from different applications, while days of first flowering, days of first boll opening, plant height, number of monopodial branches per plant, number of sympodial branches per plant, node number of first sympodial branches, number of nodes per plant. height/node ratio, weight of boll, 100 seed weight. ginning percentage, first picking percentage and fiber technological properties not affected from different humic acid applications. The results indicated that application of humic acid at the pre-flowering stage increased the seed cotton yield, fiber yield and number of bolls per plant. It. was concluded that application of humic acid at. pre-flowering stage to green parts of plants was more appropriate than other applications in cotton.