| Effects of different irrigation quotas on water consumption and yield of sunflower |
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| DOI：10.7606/j.issn.1000-7601.2019.06.16 |
| Key Words: confectionary sunflower irrigation quota water consumption crop coefficient projection pursuitclustering |
| Author Name | Affiliation | | ZHAO Jinghua | College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi, Xinjiang 830052,China | | XU Jian | Xinjiang Scientific Research Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830052, China | | MA Liang | College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi, Xinjiang 830052,China | | MA Yingjie | College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi, Xinjiang 830052,China |
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| Abstract: |
| In order to study the effects of different irrigation quotas on the yield and the yield composition of sunflower and to select the optimum irrigation system, 5 different irrigation quotas, 300, 375, 450, 525, and 600 m3·hm-2 were used.The effects of different irrigation quotas on the yield, its composition, and water consumption index of sunflower were studied. In order to make up for the lack of intuitiveness analysis of the field experiment, the MAGA-PPC model was used to comprehensively and objectively evaluate field trial results based on the indicators of growth, fruit quality, yield, and water consumption. The results showed that different irrigation quotas did affect the water consumption of sunflower. The water consumption, water consumption intensity, water consumption modulus, and crop coefficient of edible sunflower increased with increase in irrigation quota. Water consumption, water consumption intensity, water consumption modulus and water consumption was the most at 525~600 m3·hm-2. At the bud stage and early maturity, the irrigation quota of 525~600 m3·hm-2 had even greater influence on the water consumption, water consumption intensity, and crop coefficient of the sunflower. The water consumption of the sunflower under 300 m3·hm-2 was decreased first and then reached a relatively stable level.The diameter, yield, and water use efficiency of the sunflower increased with increasing irrigation quota. The yield and water use efficiency were the highest under 525 m3·hm-2 irrigation quota.Yield and water use efficiency were 4781.86 kg·hm-2 and 14.37 kg·mm-1·hm-2, respectively. The 525 m3·hm-2 irrigation quota resulted in the highest yield indicating it is more suitable for local sunflower production. The evaluation results of MAGA-PPC model showed that the 525 m3·hm-2 irrigation quota was conducive to increase sunflower production for water saving in the northern Xinjiang region. To sum up, it is recommended to ensure that the water supply is sufficient at the bud stage and early maturity of the sunflower, and the 525 m3·hm-2 irrigation quota is used. |
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