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Journal of Biological Sciences
Year: 2007  |  Volume: 7  |  Issue: 5  |  Page No.: 823 - 826

Response of Wheat to Applied Supplemental Potassium in Saline Sodic Soil

Shahzada Munawar Mehdi, Muhammad Sarfraz and Syed Adeel Akhtar Shah    

Abstract: A field experiment was conducted to determine the response of wheat to applied potassium in saline-sodic soils. Five rates of K2O were applied i.e., 0, 30, 60, 90 and 120 kg haG1 along with a basal dose of N and P2O5 i.e., 140 and 110 kg haG1, respectively. The whole of P, K and 2 of N was applied at the time of sowing and remaining 2 N was applied at the time of 1st irrigation. The system of layout was Randomized Complete Block Design with four replications. The net plot size was 6H4 m. Fertilizer sources of NPK were urea, TSP and SOP, respectively. Wheat variety inqulab-91 was sown as test crop. The yield and yield components data was recorded and grain and straw samples were analysed for K contents. Soil samples after harvesting the crop were also collected and analysed for the extractable soil K. The results indicated that increasing rates of potassium fertilizer increased the number of tillers mG2, plant height (cm), 1000-grain weight, grain and straw yield significantly. Maximum grain (3.06 t haG1) and straw (3.57 t haG1) yield were found in T4 (90 kg K2O haG1). Increasing rates of potassium fertilizer increased concentration of potassium in grain and straw significantly. After harvesting the crop, the extractable potassium contents of soil increased from that of the original soil.

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