Badawy, S., Sorour, S., Hamad, S., B, A. (2021). Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents. Journal of Plant Production, 12(8), 949-957. doi: 10.21608/jpp.2021.87760.1046
Shimaa A. Badawy; Sobhy GH. R. Sorour; S. Hamad; Asmaa F. B. "Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents". Journal of Plant Production, 12, 8, 2021, 949-957. doi: 10.21608/jpp.2021.87760.1046
Badawy, S., Sorour, S., Hamad, S., B, A. (2021). 'Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents', Journal of Plant Production, 12(8), pp. 949-957. doi: 10.21608/jpp.2021.87760.1046
Badawy, S., Sorour, S., Hamad, S., B, A. Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents. Journal of Plant Production, 2021; 12(8): 949-957. doi: 10.21608/jpp.2021.87760.1046
Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents
1Agronomy Departement., Facalty of Agriculture, 33516 Kafrelshiekh University,kafrelsheikh, Egypt.
2Field Crops Research Institute Agriculture Research Center. Giza, Egypt
Abstract
Wheat cv. Sakh 93 was planted on a clay soil at Agricultural Research Station Farm, Kafrelsheikh, in 2014/2015 and 2015/2016 seasons to investigate the influence of irrigation regime (irrigation at 40, 55, and 70% depletion of available soil moisture, DASM), nitrogen rates (50,70 and 90 kg N/fed.) and potassium rates (0,12 and 24 kg K2O/fed.) on productivity and certain water relations. The reduction in DASM from 70% to 40% at irrigation and increasing either nitrogen or potassium rates resulted in significant increases in spike number m-2, grain number/ spike, 1000-grain weight, grain yield, water Applied (WA), water Consumptive Use (WCU), productivity of Water Applied (PWA), productivity of Water Consumptive Use (PWCU), stored Water (SW). Irrigation at 55% DASM with 70 kg N and 24 kg K2O/fed-1 recorded the best values of PWA for grain (1.12 and 1.09 kg grain m3 AW). Raising the nitrogen rate from 50 to 90 kg N fed-1 significantly raised water applied efficiency (WAE %) in both seasons. Irrigation at 70% DASM with 90 kg N and 0 kg K2O fed-1 produced the highest values of WAE (86.43 and 86.98 %), while irrigation at 40% DASM with 50 kg N and 24 kg K2O/fed produced the lowest values (71.77 and 71.60 %) in both seasons. In conclusion, irrigation at 55% DASM with application of 70 kg N and 12 or 24 kg K2O fed-1 was the best treatment, which resulted in high grain yield with fewer amounts of applied irrigation water and consumptive use.
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