Effect of Different Plant Density and Nitrogen Doses on Cotton Yield and Quality

This study was carried out to determine the effects of different nitrogen doses and plant density on cotton yield, fiber quality criteria and some physiological properties. A field experiment was conducted according to the split plots design in randomized blocks with 4 replications and 4 different nitrogen doses (6, 12, 18 and 24 kg da-1 N) were formed in the main plots and plant density (5, 10 and 15 cm) in the sub plots. In the study, it was determined that there were significant statistical differences between applications in terms of seed cotton yield, number of sympodial, monopodial branches and number of nodes. It was determined that plant density had a significant effect on seed cotton yield and number of sympodial branches, nitrogen doses had a significant effect on the number of monopodial branches and number of nodes, and the interaction of nitrogen dose x plant density was effective on plant height. The results showed that the highest seed cotton yield was obtained from 5 cm intra-row and the highest number of sympodial branch was obtained from 15 cm plant density. Among the nitrogen doses, it was determined that the highest number of monopodial branches and number of nodes were obtained at the nitrogen dose of 6 kg da-1. As a result of the study, in the light of this information, it was concluded that the Olivia cotton variety can be recommended because it has the highest yield when planted in 5 cm intra-row and also has the highest monopodial and sympodial branches when a nitrogen dose of 6 kg da-1 is applied.