Volume 15, Issue 71 (vol. 15, no. 71 2026)
2026, 15(71): 253-270 |
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Baharvand J, Khorgami A, Rafiee M, Mirdrikvand R. Evaluation of the effect of organic fertilizers and supplementary irrigation on yield, gas exchange, and antioxidant enzymes in barley. Plant Process and Function 2026; 15 (71) : 15
URL: http://jispp.iut.ac.ir/article-1-2240-en.html
URL: http://jispp.iut.ac.ir/article-1-2240-en.html
1- Department of Agronomy, khorramabad branch , Islamic Azad university, Lorestan, Iran
2- Crop and Horticultural Science Research Department, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
3- Department of Agronomy, khorramabad Branch , Islamic Azad University, Lorestan, Iran
2- Crop and Horticultural Science Research Department, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
3- Department of Agronomy, khorramabad Branch , Islamic Azad University, Lorestan, Iran
Abstract: (30 Views)
The aim of this research was to evaluate the effect of organic fertilizers and supplementary irrigation on yield, gas exchange, and antioxidant enzymes in the barley crop, was carried out split-plot in the form of a basic design of randomized complete blocks in 3 replicationsin 2021-2022 cropping years in Khorramabad city. The experimental factors supplemental irrigation (no irrigation), irrigation in heading stage, irrigation in the seed milking stage and irrigation in the heading + milking stage in the main plots and levels of organic fertilizers (no fertilizer), 1 ton h-1 of cow manure + 0.5 ton h-1 of poultry manure, 2 ton h-1 of cow manure + 1 ton h-1 of chicken manure, 3 ton h-1 of cow manure + 1.5 ton h-1 of poultry manure, 4 ton h-1 of manure cow + 2 ton h-1 of poultry manure, 5 ton h-1 of cow manure + 2.5 ton h-1 of poultry manure in the sub plots. The highest number of seeds per spike with an average of 35.33 and the weight of one thousand seeds with an average of 43.67 gr in the treatment of using 5ton h-1 of cow manure + 2.5ton h-1 of poultry manure with supplementary irrigation was observed in the stage of heading + milking. Supplementary irrigation in the stage of heading + milking compared to the control treatment, 5% number of spikes per plant, 8% harvest index, 35% seed yield, 12 and 25% chlorophylls a and b, 13% stomatal conductance, 11% photosynthesis rate and 11% the percentage of carbon dioxide chamber increased. Fertilizer application of 5ton h-1 of cow manure + 2.5ton h-1 of poultry manure had a significant positive effect on all measured traits. These results showed that the integration of irrigation management and organic nutrition plays a key role in optimizing barley production under Khorramabad conditions and can lead to a significant increase in yield and improvement in the physiological characteristics of the plant. Accordingly, it is recommended that farmers in the Khorramabad region and areas with similar climatic conditions utilize this integrated irrigation and nutrition pattern (including supplementary irrigation at the heading and milky stages and the application of 5 ton h-1 of cow manure along with 2.5 ton h-1 of chicken manure) to achieve the maximum yield potential of barley.
Article number: 15
Keywords: Chlorophylls a, Catalase, Photosynthesis rate, Stomatal conductance and Superoxide dismutase
Type of Study: Research |
Subject:
others
Received: 2025/07/21 | Accepted: 2025/09/30 | Published: 2026/05/2
Received: 2025/07/21 | Accepted: 2025/09/30 | Published: 2026/05/2
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