Effect of Potassium on Inflow Rate of N, P, K, Ca, S, Fe, Zn and Mn at Various Growth Stages of Wheat

A pot experiment was conducted under net house condition to study the effect of four levels of potassium (K₀, K₆₀, K₉₀ and K₁₂₀ mg Kkg^-1) on grain yield, dry weight of ischolar_main, ischolar_main volume, total ischolar_main length, nutrients content and inflow rate of nutrients in five wheat cultivars (Lok 1, GW 496, GW 273, GW 1139 and HI 8439) at different periods of wheat crop in factorial CRD with five replications. The grain yield of wheat was significantly increased due to application of potassium up to K90 treatment and further it was decreased with increased in level of K. Dry weight of ischolar_main and ischolar_main volume were significantly increased with increase in potassium levels up to 90 mg K kg^-1 at 100 DAS, but at 50 DAS, the ischolar_main volume was recorded maximum under K₁₂₀ treatment. Total ischolar_main length was significantly increased with increase in K level and found maximum with K₁₂₀ at all period of crop growth. The content of N, P, K, Ca, S, Fe, Mn and Zn in straw, ischolar_main and grain were decreased with advancement of crop growth and were increased significantly with K levels at all the periods of crop growth. However, the content of Ca in straw, ischolar_main and grain was significantly decreased with increasing potassium levels. Application of potassium significantly affected the inflow rate of N, P, K, Ca and S at 75 to 100 DAS and found maximum with K90 treatment. Similarly, inflow rate of P and Ca at 25 to 50 and 50 to 75 DAS were also significantly influenced due to the application of potassium. Inflow rate of Fe, Mn and Zn were affected significantly due to the application of potassiumon all the period of crop growth, except Mn at 50 to 75 DAS. The different varieties produced their significant effect on yield and inflow rate of nutrients at different period of crop growth.