Effect of water deficit and zinc application on yield and yield components of rape seed

Subject Areas : Journal of Plant Ecophysiology

Razieh  Ahangarha ¹ (گروه زراعت و اصلاح نباتات، واحد علوم تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران)
B.  Delkhosh ² (گروه زراعت و اصلاح نباتات، واحد علوم تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران)
A.  Shiranirad ³ (موسسه تحقیقات اصلاح و تهیه نهال و بذر، کرج، ایران)
GH.  Norrmohammadi ⁴ (گروه زراعت و اصلاح نباتات، واحد علوم تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران)

Received: 2015-03-03 Accepted : 2015-07-05 Published : 2016-09-01

Keywords: zinc, Drought stress, Rape seed,

Abstract :

Abstract To evaluate the effect of water deficit and zinc application on quantitative and qualitative yield of three rape seed cultivars, a factorial split plot experimental design based on randomized complete blocks design (RCBD) with three replicates was conducted in Ismaeil Abad,Qazvin, Iran in 2011. The main plot was irrigation regimes in four levels: control, cut irrigation at stem extension stage to the end, cut irrigation from flowering stage to the end and cut irrigation from pudding stage to the end) and foliar application (in two levels: control and zinc foliar application 2g/lit). The sub plot comprising three levels of cultivars such as OKAPI, ZARFAM and SLM046. The results showed that the highest 1000 seed weight, biological yield, seed yield, harvest index, seed oil percentage and oil seed yield was obtained by normal irrigation. The highest 1000 seed weight, biological yield, seed yield, harvest index, seed oil percentage and oil seed yield was also gained by the applied zinc. ZARFAM and SLM046 had the highest seed yield (respectively 3030.1 and 2771/1kg.ha-1) and the maximum seed oil percentage was obtained by ZARFAM (1324.2kg.ha-1). Overall, Zinc foliar application was more effective in increasing grain yield. It is recommended to obtain the highest yield, Zinc foliar was also applied in normal irrigation.