| Fuzzy comprehensive evaluation of yield and water consumption of seeding-watermelon under water-nitrogen coupling condition |
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| DOI：10.7606/j.issn.1000-7601.2019.03.14 |
| Key Words: seeding-watermelon water and nitrogen coupling analytic hierarchy process（AHP） fuzzy valuation yield water use efficiency the irrigation area in northern Xinjiang |
| Author Name | Affiliation | | XU Jian | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHAO Jing-hua | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | MA Ying-jie | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | YANG Lei | Water Conservancy Managing Department of Altay Prefecture, Altai，Xinjiang 836500, China | | CHEN Kai-li | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| The effects of water-nitrogen coupling on yield and water use efficiency of seeding-watermelon were stadied, and the suitable irrigation system was selected. Three different irrigation quotas (300, 450 m3·hm-2 and 600 m3·hm-2) and three different nitrogen application rates (0, 138 kg·hm-2 and 276 kg·hm-2) were set in 9 combinations. At the same time, the indexes were comprehensively analyzed by using the fuzzy comprehensive evaluation method based on analytic hierarchy process (AHP). The results showed that when irrigation quota increased by 300 m3·hm-2 and nitrogen application increased by 276 kg·hm-2, the yield and water use efficiency of watermelon increased by 1 416.7 kg·hm-2 and 5.24 kg·hm-2·mm-1, respectively. That is to say, the yield and water use efficiency increased with the increase of irrigation quota and nitrogen application rate. When irrigation quota increased from 450 m3·hm-2 to 600 m3·hm-2 and nitrogen application increased from 138 kg·hm-2 to 276 kg·hm-2, the yield of watermelon decreased by 178.9 kg·hm-2, taht is, the yield decreased with the increase of water and fertilizer application. The yield and WUE of irrigation quota 450 m3·hm-2 (W2) and nitrogen application 138 kg·hm-2 (N2) combination were 2 582.9 kg·hm-2 and 10.91 kg·hm-2·mm-1, respectively. The water saving and yield increasing of W2N2 was the best, and the fuzzy evaluation of W2N2 was also the highest, which was consistent with the results of field experiments. |
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