Yield and yield components response of cotton to potash source and zinc amount in saline condition

Subject Areas : Journal of Plant Ecophysiology

mohammad Armin ¹ (هیات علمی، دانشگاه آزاد اسلامی، واحد سبزوار، گروه زراعت و اصلاح نباتات، سبزوار، ایران)
حمید حاجی نژاد ² (دانشجوی سابق کارشناس ارشد زراعت، دانشگاه آزاد اسلامی، واحد سبزوار)

Received: 2015-02-04 Accepted : 2015-02-22 Published : 2016-12-01

Keywords: cotton, Potassium, salinity stress, fertilizer source, Nutritional management,

Abstract :

Yield and yield components of cotton to potash source and zinc amount application under saline condition was studied as a factorial experiment based on randomized block design with three replication in Bardaskan's Astan Ghods Razavi farm research at 2011-2012. Factors were Potash source (Potassium nitrate, potassium sulphate and potassium chloride (100 kg.ha-1 K2O) and different levels of Zinc (0, 20, 40 and 60 kg.ha-1 as Zinc sulfate). The experiment was conducted on 8.2 and 9 ds.m-1 soil and water electrical conductivity. The results showed that Potash source and Zinc amount had significant effect on plant height, number of boll, boll weight, seed cotton yield, lint percentage and earliness. Application of potash (70 kg.ha-1) as Potassium nitrate was better than other source for all traits. Although, There was no significant difference between 40 and 60 kg.ha-1 Zinc application but increasing of zinc level to 60 kg.ha-1 increased plant height (23.46%), number of boll (17.01%), boll weight (15.58%), seed cotton yield (23.38%), lint percentage (4.66%) and earliness (4.86%) compared than control. Overall, Zinc improved plant growth under salt-affected soil conditions and 40 Kg.ha-1 zinc application and potash (70 kg.ha-1) as Potassium nitrate were enhanced yield and yield components of cotton.