Optimizing rainfed barley production by using nitrogen fertilizer and growth regulators in Khorram Abad and Poldokhtar agro-ecosystems

Articles in Press

Document Type : Research Paper

Authors

1 Department of Agronomy and Crop Breeding, Faculty of Agriculture, Ilam University, Ilam,I. R. Iran.

2 Assis. Prof., Dept. of Agronomy, Faculty of Agriculture, Ilam University, Ilam, Iran

3 PhD in Agronomy, Lorestan Province Agricultural Jihad Organization,I. R. Iran.

Abstract

The simultaneous application of nitrogen fertilizer and growth regulators in rainfed conditions improves plant growth and development parameters. For this reason, research was conducted in two regions in the crop year of 1402-1401 in Poldokhtar and Khorram Abad cities. The experiment was carried out as a factorial design in the form of a basic randomized complete block design with three replications. The first factor includes four levels of nitrogen chemical fertilizers, including 0, 50, 100 and 150 kg.h-1 urea, and the second factor was foliar application of blank (spraying solution with distilled water), paclobutrazol (120 mg/liter), spermidine (1 mM), and chlormequat chloride (three grams per liter). The average comparison results showed that the highest root dry weight was observed in the treatment of 100 kg.h-1 nitrogen fertilizer and chlormequat chloride foliar spraying at the rate of 7.25 g.m-2, and the lowest amount in the absence of nitrogen fertilizer and foliar spraying at the rate of 4.45 grams. It was obtained in square meters. The highest seed yield was observed in the treatment of 100 kg.h-1nitrogen fertilizer and paclobutrazol foliar spraying at the rate of 2686.4 kg/ha, and the lowest rate was obtained in the absence of nitrogen fertilizer and no foliar spraying at the rate of 1284.8 kg/ha. . According to the results of this study, the use of nitrogen fertilizer and foliar application of growth regulators can significantly improve the growth, yield and photosynthetic pigments of barley in rainy conditions.

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Iranian Journal of Soil and Water Research

Articles in Press, Accepted Manuscript
Available Online from 22 October 2024

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