Pamukta (Gossypium hirsutum L.) Hasat Öncesi Yağışların Çimlenme ve Elyaf Renk Değerleri Üzerine Etkisi

Abstract

Unexpected rainfall in harvest season has a detrimental effect on cotton lint color grade and germination rate to extent that economic losses occur for farmers, seed producers and manufacturers. This study was conducted to elucidate the effects of different rainfall amounts on cotton and to evaluate the response of different cultivars in the harvest season of 2014 and 2015. Bolls were exposed to 0 (control), 20, 35, 65, 95 and 125 mm of precipitation. The effects of rainfall were determined in GSN-24, Claudia, Gloria, ST-373, Flash, Carisma and ST-468 cotton cultivars (Gossypium hirsutum L.). The responses of cultivars to different cumulative rainfall were significant for lint color grade and seed germination rate. The linear curve in the decreasing direction according to the highest R2 value was evaluated for germination rate, reflectance (Rd), trash count and size whereas the polynomial curve was more likely for yellowness (+b). The effects of rainfall amounts on all observed characters were unfavorable. The different responses of cultivars were indicated that the cultivars with the least loss for lint color grade and seed production could be recommended in terms of highly profitable.