Effect of different form of nitrogen fertilizer and Zn amount on yield and yield components of cotton under saline conditions

Subject Areas : Journal of Plant Ecophysiology

M.  Armin ¹ (گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران)
J.  Ismaelnia ² (مرکز جهاد کشاورزی بردسکن)

Received: 2015-09-24 Accepted : 2015-09-24 Published : 2015-09-01

Keywords: zinc, nitrogen, Salinity, cotton, seed cotton yield,

Abstract :

The response of yield and yield components of cotton to nitrogen source and zinc amount application under saline condition was examined as a factorial experiment based on randomized complete block design with three replications in Bardaskan's Astan-e-Ghods-e-Razavi Research Farm in 2012. Factors were nitrogen source: ammonium sulfate, ammonium nitrate and urea and different levels of zinc: 0, 20, 40 and 60 kg.ha-1 as zinc sulfate. The results showed that nitrogen sources and zinc amount had significant effect on number of sympodial reproductive branches, number of boll, boll weight, seed cotton yield. However, lint percentage was not affected by nitrogen source. Application of nitrogen as ammonium nitrate was better than other sources for all traits. Increasing of zinc level to 60 kg.ha-1 increased number of sympodial reproductive branches(27.29%), number of boll (17.01%), boll weight (4.74%), seed cotton yield (26.88%) and lint percentage (27.11%) compared with the control. There was no significant difference between 40 and 60 kg.ha-1zinc application. Overall, zinc improved plant growth under salt-affected soil conditions and 40 Kg.ha-1 zinc application and nitrogen as ammonium nitrate enhanced yield and yield components of cotton.