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Research Paper | June 1, 2014

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The effect of auxin foliar spray on qualitative traits of forage sorghum var. speed-feed under water deficit stress

Masoud Mottaleb Nejad, Tayeb Saki Nejad, Ali Reza Shokohfar

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J. Bio. Env. Sci.4(6), 178-184, June 2014

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Abstract

In order to study the effect of water deficit stress and different levels of auxin hormone on qualitative traits of forage sorghum Var. speed-feed, a split plot experiment in the form of randomized complete block design with three replications was carried out in Shahid Salemi Field in Ahvaz in 2012. Water deficit as the main factor included three levels of irrigation after 90, 120, 150 mm evaporation from class A evaporation pan and auxin as the sub factor was applied in four levels including lack of auxin, 15, 20, 25 ppm auxin. The qualitative traits of the crop (protein percentage, ash, fiber, and the rate of prussic acid) were examined. Different levels of water deficit stress significantly affected the studied qualitative traits. In sever water deficit stress (150 mm evaporation) the percentage of protein, ash, and fiber decreased while the toxic prussic acid increased. Auxin hormone only had a significant effect on the percentage of protein and ash. The highest percentage of protein and ash was achieved through the application of 25 ppm auxin.

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