The Effect of Combined Use of Nitrogen Fertilizer and Sugarcane Residue Compost on Wheat Grain Quality and Yield under Terminal Heat Stress Conditions in Ahwaz

The effect of the combined use of nitrogen fertilizer with sugarcane residue compost and growth-promoting bacteria on wheat quality traits and yield in the heat stress conditions of the end of the season in Ahvaz was investigated.

An experiment was carried out in the form of two split plots in the form of a randomized complete block design with three replications. The experimental factors include three sowing dates: 22 November, 11 December and 31 December in main plots; six combined of nitrogen with compost include control, 100% nitrogen, 75% nitrogen+ 25% compost, 50% nitrogen+ 50% compost, 25% nitrogen+ 75% compost and 100% compost in sub-plots and two levels of use and non-use of bacteria in sub plots.

Results showed the effect of Sowing date and the combined use of nitrogen with compost and growth-promoting bacteria were significant on all measured traits. Average comparison showed that combined use of 50% nitrogen + 50% compost with bacterial application increased the characteristics of Grain filling duration and Grain filling rate, Grain protein percentage and wet gluten. Also, the highest seed yield (5864 kg/ha) was obtained on the first planting date and combined consumption of 50% nitrogen + 50% compost and the lowest amount (1115 kg/ha) was obtained on the third planting date and the control treatment.

The combined use of nitrogen fertilizer and compost with growth-promoting bacteria could reduce the negative effect of heat stress at the end of the season on the measured plant traits.