Effect of nitrogen and potassium fertilizers on wheat productivity under different soil moisture contents | ||
| Journal of Plant Production | ||
| Article 15, Volume 12, Issue 8, August 2021, Pages 949-957 PDF (1.24 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2021.87760.1046 | ||
| Authors | ||
| Shimaa A. Badawy* 1; Sobhy GH. R. Sorour1; S. Hamad2; Asmaa F. B2 | ||
| 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. | ||
| Keywords | ||
| Wheat productivity; nitrogen fertilization; potassium fertilization; soil moisture; Water Relations | ||
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