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Mehdi akbari; Fariborz Abbasi; Abolfazl Nasseri; Afshin Gomrokchi; mostafa goodarzi; Amir Eslami; masoud Farzamnia; r alimohammadi; Nader Kouhi Chellehkaran; Reza Bahramloo; Ali Ghadami Firouzabadi; seyed abolghassem Haghayeghi moghaddam; Ardalan Zolfagharan; Jamal Ahmadaali; Mohamad Abasi; Hamid Riahi; Mohammad Mehdi Nakhjavanimoghaddam
Abstract
In this study, volume of irrigation water, water productivity, and yield of alfalfa were measured in 300 farms in Zanjan, Fars, Chaharmahal and Bakhtiari, Hamedan, East Azerbaijan, Semnan, Khorasan-Razavi, Isfahan, West Azerbaijan, Central, Qazvin and Kerman provinces under farmers management and surface ...
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In this study, volume of irrigation water, water productivity, and yield of alfalfa were measured in 300 farms in Zanjan, Fars, Chaharmahal and Bakhtiari, Hamedan, East Azerbaijan, Semnan, Khorasan-Razavi, Isfahan, West Azerbaijan, Central, Qazvin and Kerman provinces under farmers management and surface and sprinkler irrigation, various water sources, different water salinities, soil conditions, and varieties, during the growing season of 2018-2019. The results showed that the difference between average volumes of water applied by farmers, yield, and water productivity, in the studied sites were significant at 1% probability level. The average amount of applied water by farmers was 8502, 8901, 9226, 9459, 11481, 12796, 14311, 14821, 15198, 15916, 18351 and 23920 m3/ha, respectively, and the average was 13284 m3/ha. The dry yield of alfalfa varied from 2500 to 30000 kg/ha with an average of 13841 kg/ha. Irrigation water productivity varied from 0.2 to 4.5 and its average was 1.28 kg/m3. The average irrigation water plus effective rainfall productivity for alfalfa was 1.19 kg/m3. The results showed that the average applied water and alfalfa yield in surface and sprinkler irrigation methods were 15076 and 10653 m3/ha, respectively, (p<1%). These results showed that in sprinkler irrigation method, applied water was 30% less and irrigation water plus effective rainfall productivity was 41% higher. Accordingly, in order to reduce the volume of irrigation water and improve alfalfa water productivity, it is recommended to use sprinkler method in suitable climatic conditions where irrigation water is of good quality and the technical criteria of design, implementation, operation, and economic considerations are met.
r alimohammadi; a mousavi; m tatari; a.r fatahi
Abstract
In order to investigate the effects of deficit irrigation during phenological stages of fruit growth and development on almond (cv. “Mamaei”) production, an experiment was carried out in split plot and complete randomized block design with three replicates in 2000-2003.The main plots were ...
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In order to investigate the effects of deficit irrigation during phenological stages of fruit growth and development on almond (cv. “Mamaei”) production, an experiment was carried out in split plot and complete randomized block design with three replicates in 2000-2003.The main plots were three different stages of fruit growth consisting of: stage I (fruit growth), stage II (kernel growth) and stage III (pre-harvest period). The subplots were different irrigation regimes including T1=100% ETC (Full irrigation), T2= 80% ETC (deficit irrigation), T3=40 % ETC (deficit irrigation), and T4=0 % ETC (without irrigation). Parameters such as fruit size (length, width, and diameter), fresh and dry fruit weight, fresh and dry kernel weight, fruit drop, kernel percentage and yield were measured. The results showed that deficit irritations and water stress during stage-I decreased fruit size (length, width and diameter of fruit), fresh and dry weight of fruit and increased fruit drop percentage; but it did not have significant effect on mineral elements in leaf and fruit. The deficit irrigation and water stress during stage-II decreased fresh fruit weight, fresh and dry kernel weight, N in leaf and B in fruit. However, there was no significant effect on the measured parameters during stage-III. According to the results, deficit irrigation during all phenological stages of fruit growth significantly decreased yield, kernel dry weight and kernel percentage. The results showed that the effects of phenological fruit stages on N, K, Ca and B in leaf and on N, K, P, Mg, Ca, Zn, Fe, Mn, Cu and B in the fruits were significant, but the effects of irrigation regimes were not significant on mineral elements in leaf and fruits.
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