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  • 1 G.B. Pant University of Agriculture & Technology Department of Plant Physiology, College of Basic Sciences and Humanities Pantnagar, U.S. Nagar 263145 Uttarakhand India
  • 2 G.B. Pant University of Agriculture & Technology Department of Entomology, College of Agriculture Pantnagar, U.S. Nagar 263145 Uttarakhand India
  • 3 G.B. Pant University of Agriculture & Technology Department of Soil Science, College of Agriculture Pantnagar, U.S. Nagar 263145 Uttarakhand India
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Zinc is essentially required for crop growth and its insufficient supply to the plants may severely limit the yield traits of a crop. A field experiment was performed during rabi season of 2009–10 and 2010–11 to evaluate the performance of different wheat genotypes under different levels of zinc namely 0 kg ZnSO4 ha−1, 20 kg ZnSO4 ha−1 and 20 kg ZnSO4 ha−1 along with foliar spray of 0.5% solution of ZnSO4. Genotypes responded positively in terms of tiller number, grain and biological yield, spikelet length, spikelet number, grain number and thousandgrain weight. The best response was observed with the application of 20 kg ZnSO4 ha−1 along with foliar spray of 0.5% solution of ZnSO4. Zinc application brought about a maximum increase of 58.6% in tiller number, 63.7% in thousand-grain weight, 40.5% in biological yield, 66.1% in grain yield irrespective of genotypes and the year of study. Wheat genotypes exhibited a variation in their performance which has been exploited in this study. Genotypes UP-262, PBW-175, PBW-343 were found to be superior for one or the other yield contributing factors.

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