Journal of Food, Agriculture and Environment

Effects of water limitation on grain and oil yields of sunflower cultivars

Author(s):

Ahmad Afkari Bajehbaj

Recieved Date: 2009-08-28, Accepted Date: 2010-04-01

Abstract:

Two field experiments were carried out in 2008 and 2009, in order to investigate the effects of water deficit (I1, I2, and I3: irrigation after 70, 140 and 210 mm evaporation from Class-A pan) on grain and oil yields of four sunflower cultivars, Airfloure, Alestar, Armawirski and Ismailli, and three rates of potassium application as control, 75 and 150 kg/ha. Experiments were arranged as split plot factorial based on randomized complete block design in three replications, with the irrigation levels in main plots and sunflower cultivars in subplots. The results indicated that all traits except grain weight were significantly affected by irrigation regimes. Grains per plant, biological yields, oil percentage and grain and oil yields decreased while oil percentage increased with increasing water availability. Severe water stress (210 mm evaporation) reduced the grain yield and oil yield by 43.71% and 18.96%, respectively. The extent of these reductions was related with the variations in grain and oil yield and oil percentages of sunflower under different irrigation treatments. Armawirski was a superior cultivar under all irrigation treatments.

Keywords:

Biological yield, sunflower, water limitation, grain and oil yields, oil percentage

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 1
Category: Agriculture
Pages: 98-101

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