PJB-2018-312
PHENOLOGY, GROWTH, YIELD AND NITROGEN UPTAKE OF WHEAT IN RESPONSE TO NITROGEN, POTASSIUM AND THEIR APPLICATION METHODS
Asad Ali Khan
Abstract
Application of macro nutrients in less amount along with improper application method are the major factors for low yield. An experiment was designed with the objective to determine the optimum rate of nitrogen and potassium along with suitable application method to minimize nutrients losses. The experimental site was New Developmental Farm of the University of Agriculture Peshawar and experiments was conducted for two consecutive years 2010-11 and 2011-12. After analysis the results indicated that both N and K significantly affected days to phenology (anthesis and maturity). Days to phenology increased linearly with increase in rate of N and K and more days to phenology were recorded when both were at their highest rate. Similarly plant height, leaf area tiller-1, flag leaf area, leaf area index, leaf area duration, grain yield, N uptake by grains and straw also increased with increasing level of N and K and attained maximum value when N and K was applied at the rate of 180 and 90 kg ha-1 respectively. Nutrients application method significantly affected plant height, leaf area tiller-1, flag leaf area, grain yield and N uptake by straw and grains with maximum values for these traits were recorded when nutrients (N and K) was applied in such a combination that 15% nutrients were supplied through foliar and 85% through soil application. Application methods had a non-significant effect on days to phenology, leaf area index and leaf area duration. It is concluded from the results that application of N and K at the rate of 180 and 90 kg ha-1 respectively in combination of foliar and soil in the ratio of 15: 85 improved growth, yield and N uptake of wheat crop under the semi-arid climate.
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