Volume 15, Number 55 (spring 2011)                   JWSS 2011, 15(55): 199-207 | Back to browse issues page


XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

GH. Omidi Ardali, M. J. Bahrani. Effects of Water Stress, Nitrogen Levels and Application Times on Yield and Yield Components of Sunflower at Different Growth Stages. JWSS. 2011; 15 (55) :199-207
URL: http://jstnar.iut.ac.ir/article-1-1556-en.html

Abstract:   (19927 Views)
The optimum levels of soil moisture and nitrogen are important to obtain higher yields. To investigate the effects of water stress, nitrogen levels and application times on yield and yield components of sunflower (Helianthus annuus L.), the cultivar Euroflor at different growth stages, a two year study (2006-007) was conducted at Research Fields of College of Agriculture, Shiraz University (Badjgah) using a split factorial design with four replications. Treatments were water stress at three levels, (non-stress and stress at flowering and seed formation) as main plot and three N levels (0, 70, 140 kg ha-1) and N application times (split application at planting and stem elongation, planting and heading, and stem elongation and heading) as subplot. Number of seed per head, 1000-seed weight, seed yield, Oil yield and HI were measured. Results showed that the effects of water stress and N rates on yield and yield components were significant, but the effects of N application times and interaction between water stress, nitrogen rates and application times were insignificant. Overall, the crop showed more sensitivity to drought stress at flowering time, and 70 kg N ha-1 is recommended for the region.
Full-Text [PDF 152 kb]   (3261 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2011/06/26

Add your comments about this article : Your username or email:
Write the security code in the box

© 2015 All Rights Reserved | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb