Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCES   2006 , Volume 12 , Number 1 (SUPPLEMENT); Page(s) 109 To 121.
 
Paper: 

A SURVEY ON THE IMPACT OF WATER DEFICIENCY OVER THE YIELD OF SUNFLOWER SEED CULTIVAR AND ITS COMPONENTS

 
 
Author(s):  ROSHDI MOHSEN, HEYDARI SHARIFABAD H., KARIMI MAHDI, NOURMOHAMMADI GHORBAN, DARVISH F.
 
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Abstract: 

A two years research was carried out on the impact of water deficiency on the yield of 3 types of oilsunflower in Khoy. The experiment was done in Split Plot of the basis of complete block design in four replications. The irrigation levels were chosen as the main factor in 6 levels (70-70-70, 90-90-90, 110-110-110, 90-70-90, 110-70-110, 110-90-90 mm evaporation from the class A evaporation pan-respectively, From shrub settlement stage to the appearance of head turning into yellow and finally to the physiological survey were put into action). Cultivars of Record, Hisun 33. and Armaverski were chosen as a secondary factor in 3 levels.The comparison of the average Functions indicated that the highest quantity of 100-seed weight the number of the seeds in head , percentage of the core to the entire seed and also the harvest index were attained in the Functions of 70-70-70, 90-90-90 evaporation from the class A evaporation pan. The maximum diameter of the tray with 17.2 cm. and the function of seed and oil, respectively with 5125.4 and 2382.6 Kg per hectare belonged to the function of 70-70-70 mm evaporation. The irrigation care of 90-70-90 mm regarding to the yield of seed and oil , didn’t show a meaningful difference with level 70-70-70 mm. The function of 110-110-110 mm evaporation, the least quantity of seed and oil and its components was attanined , but the percentage of hollowness of the seed in this level was higher than the others. The number of the seeds in the tray showed the utmost corelationship (r=0.711) with the seed yield. Record and Hisun 33 cultivars, concerning the qualities studied, were better than Armaverski cultivar and showed meaningful difference with it. The comparison of the interative averages of the factors showed that the two cultivars Hisun 33 with the irrigation level of 70-70-70 mm had the maximum diameter of the tray, the number of seed in it, and also seed and oil yield. The general results of this research shows that the plantation of oil-sunflower cultivars (Hisun 33 and Record) with the alteration of 90mm evaporation in the beginning and ending of the growth season are suitable for Khoy region. But because of the sensitivity for the water deficiency, the time of irrigation in the appearance of the tray till turning into yellow, must be regulated on the basis of 70 mm evaporation.

 
Keyword(s): SUNFLOWER, WATER DEFICIENCY TENSION, GRAIN YIELD, YIELD COMPONENTS
 
References: 
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