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:: Volume 17, Issue 2 (تابستان 2015) ::
علوم زراعی 2015, 17(2): 115-127 Back to browse issues page
Effect of improvers application on seed yield and irrigation water use efficiency of sunflower (Helianthus annuus L.) under water deficit stress conditions
Abstract:   (4268 Views)

To evaluate the effect of improvers and water deficit on seed yield and irrigation water use efficiency of sunflower (Helianthus annuus L.), a field experiment was conducted as split-factorial in randomized complete block design with three replications in Isfahan and Tehran, Iran, during the 2012 growing season. Experimental treatments were 1- water stress at three levels 60, 120 and 180 mm evaporation form class A pan were assigned to main plots, 2- soil improvers at three levels control (no application), zeolite (4.5 t.ha-1) and super absorbent polymer (100 kg.ha-1) and 3- plant improvers at theree levels control (zero), calcium silicate (400 mg.l-1) and Hexaconazole (2 g.l-1) as factorial were randomized in sub-plots. Water deficit significantly decreased seed yield (45%) and oil yield (20%), biological yield (22%), seed number per plant (32%) and 1000 seed weight (29%). Application of zeolite and hexaconazole led to higher seed yield. Water deficit at 180 mm level reduced the oil yield by 58%. Application of super absorbent polymer and calcium silicate reduced the effect of water deficit stress by 19%. Application of zeolites and hexaconazole had the highest irrigation water use efficiency (IWUE). IWUE increased with application of combination of soil and plant improverby 25% to 59%.

Keywords: Calcium Silicate, Hexaconazole, Sunflower, Super absorbent polymer and Zeolite
Full-Text [PDF 388 kb]   (1643 Downloads)    
Type of Study: Scientific & Research | Subject: Special
Received: 2015/10/11 | Accepted: 2015/10/11 | Published: 2015/10/11
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Effect of improvers application on seed yield and irrigation water use efficiency of sunflower (Helianthus annuus L.) under water deficit stress conditions. علوم زراعی 2015; 17 (2) :115-127
URL: http://agrobreedjournal.ir/article-1-521-en.html


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Volume 17, Issue 2 (تابستان 2015) Back to browse issues page
نشریه علوم زراعی ایران Iranian Journal of Crop Sciences
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