Growth Analysis of Six Corn Hybrids Under Drought Conditions in Kermansh Province, Iran

Subject Areas : Journal of Crop Ecophysiology

G. Fallahi ¹ , A. Hatami ² , R. Naseri ³

1 - Department of Agronomy and Plant Breeding, University of Ilam, Ilam, Iran
2 - Department of Agronomy and Plant Breeding, University of Ilam, Ilam, Iran
3 - Department of Agronomy and Plant Breeding, University of Ilam, Ilam, Iran

Received: 2012-12-04 Accepted : 2013-10-30 Published : 2013-08-23

Keywords: Drought stress, Growth indices, corn,

Abstract :

To study the effect of water deficit on growth indices of different maize hybrid, a split plot experiment based on randomized complete block design with three replications was carried out at Agriculture Research Station of Kermanshah during 2006. Different levels of water irrigation (full irrigation, stress before tasseling and stress after pollination and embryo formation) were measured assigned to main plots and maize hybrids (SC500, SC582, SC647, SC666, SC700 and SC704) to subplots. To determine growth indices including leaf area index, crop growth rate, dry matter accumulation, relative growth rate and net accumulation rate means of 14 times sampling were calculated. Results indicated that growth trend for leaf area index, crop growth rate, dry matter accumulation, relative growth rate and net accumulation rate in corn hybrids were similar, but they were different for levels of irrigation significantly. In such a way that drought stress decreased growth indices. The highest growth indices were obtained from full irrigation and lowest values from drought before tasseling.