Do nitrogen and zinc application alleviate the adverse effect of heat stress on wheat (Triticum aestivum L.)?

Late-season heat stress (LSH) is a limiting factor for wheat production. Besides, low zinc and poor protein diet usually problem in low-income countries. The primary calorie source such countries prepared from bread. This study aims to mitigate by nitrogen application improve content grain. We did the field experiments as split-split-plot based on randomized complete block design with four replications assess nitrogen’s possible mitigation effect LSH enrichment of grain during two years. Factors included delay planting date (optimum, late, very late) main plot, (0, 75, 150, 225 kg ha–1) subplots, 10, 20 sub-subplots. measured yield, yield components, physiological traits, zinc, contents Results showed that highest relative water cell-membrane thermal stability were attained at optimum date, 150 N ha–1 Zn ha–1. maximum chlorophyll carotenoids cells recorded ha–1, Heat reduced yield. In second year experiment, number per unit area was more than first year; however, achieved owing higher mean weight. Nitrogen decreased adverse effects increasing number. Zinc diminished impact biological hectolitre weight Meanwhile, it increased protein. general, under LSH, can reduce quality quantity.