Investigating the effect of fertilizer type on quantitative and qualitative yield of two rice cultivars under different conditions of water stress

Organic fertilizers, by creating appropriate concentrations of elements in plants, cause optimal plant growth and yield, consumer health and increase water resistance. For this purpose, two experiments were performed in separate flood and stress environments as split plots based on a randomized complete block design with three replications. Experimental factors include nitrogen fertilizer at three levels of 50, 100 and 150 kg/ha, pelleted poultry organic fertilizer at three levels of 1250, 2500 and 3750 kg/ha and cow manure and municipal waste compost at three levels each. 3750, 7500 and 11250 kg/ha were the main factors and cultivars in Gilaneh and Hashemi levels were the secondary factors. The results showed that the highest percentage of nitrogen, protein content and zinc concentration in flooding treatment, compost application at 11250 kg/ha in Hashemi cultivar were 2.013, 11.99% and 34.50 ppm, respectively. The highest percentage of nitrogen, percentage of protein, copper concentration and paddy yield in drought stress treatment, application of pelleted poultry manure at 3750 kg/ha in Gilaneh cultivar with 2.28, 13.56%, 17 ppm, and 7191 kg/ha respectively. It seems that the use of organic fertilizers has a greater effect on increasing seed quality than chemical fertilizers and to achieve the highest seed quality, fertilizer management is different under waterlogging and drought stress conditions.