[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
Main Menu
Journal Information::
Articles archive::
For Authors::
For Reviewers::
Contact us::
Site Facilities::
Search in website

Advanced Search
Receive site information
Enter your Email in the following box to receive the site news and information.
:: Volume 10, Issue 4 (1-2009) ::
علوم زراعی 2009, 10(4): 349-361 Back to browse issues page
Effect of defoliation intensity at different reproductive stages on seed and oil yields in sunflower (Helianthus annus L.)
Abstract:   (6416 Views)
In order to determine the effect of defoliation intensity at different reproductive stages in sunflower (Helianthus annus L.) on seed and oil yields, and determining the most sensitive reproductive stages to defoliation, a field experiment was conducted at Tarbiat Modares University Research field using a split plot arrangement in a RCBD with four replications in 2007 cropping season. Main plots consisted of defoliation at four reproductive stages including: star shape of inflorescence stage (R1), pollination stage (R5), seed setting initiation (R6), and end of grain filling (R7), while five defoliation intensities (0% as an undefoliated control, 25%, 50%, 75% and level removed 100%) were arranged in sub-plots. The results indicated that defoliation time and intensities had significant effects on all traits. The interaction of two factors significantly (P<0.01) reduced the grain yield, thousand seeds weight, unfilled seed and oil content. The most variation resulted from defoliation effect on number of filled seed per area and1000 seed weight, at R1 and R5 stages, consequently reduced grain and oil yields. On the bases of these results it could be concluded that sunflower crop that lost 100% of its leaves would be economically unprofitable and it is more logic to be replaced with a suitable crop adapted to the region.
Keywords: Defoliation, Oil content, Seed yield, Sunflower, Unfilled seed and 1000 seed weight.
Full-Text [PDF 367 kb]   (1110 Downloads)    
Type of Study: Scientific & Research | Subject: Special
Received: 2015/02/23 | Accepted: 2015/02/23 | Published: 2015/02/23
Add your comments about this article
Your username or Email:


XML   Persian Abstract   Print

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

Effect of defoliation intensity at different reproductive stages on seed and oil yields in sunflower (Helianthus annus L.). علوم زراعی 2009; 10 (4) :349-361
URL: http://agrobreedjournal.ir/article-1-222-en.html

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 10, Issue 4 (1-2009) Back to browse issues page
نشریه علوم زراعی ایران Iranian Journal of Crop Sciences
Persian site map - English site map - Created in 0.04 seconds with 37 queries by YEKTAWEB 4657