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Research Journal of Environmental Sciences
Year: 2010  |  Volume: 4  |  Issue: 5  |  Page No.: 460 - 466

The Effect of K-Humate on the Nitrate Content and Accumulation and Some Yield Components in Three Potato Cultivars

K. Asadi Azad, M.J. Mirhadi, D. Hassanpanah, B. Delkhoush and L. Imanparast    

Abstract: The nitrate accumulation is one of the problems in potato production that causes to decrease the production quality. The nitrate accumulation can have more reasons such as excess use of fertilizers. However, this research has studied to find the solution for this problem. This study evaluated some material effects such as the effect of K-Humate on nitrate accumulation. This experiment was performed according to the spilt plot and as base of the complete randomized design with three replications and two factors. Main factor included four levels of irrigation treatments; normal, normal with potassium humate, stress and stress with potassium humate. Sub factor included three potato cultivars; Ceaser, Satina and Agria. Variance analysis results showed significant differences in total yield, marketable yield and nitrate accumulation in tubers. Tuber the most yield was under normal with potassium humate in Ceaser and Satina cultivars and tuber the less yield was under stress condition in Agria cultivar. The nitrate accumulation decreased under stress with potassium humate condition.

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