| Cite this article: | 焦萍,虎胆.吐马尔白,米力夏提.米那多拉.南疆成龄核桃滴灌条件下根区土壤水分运动数值模拟[J].灌溉排水学报,0,():-. |
| JIAO Ping,Hudan Tumarday,Milixiati Minadola.南疆成龄核桃滴灌条件下根区土壤水分运动数值模拟[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Numerical simulation of Soil Water movement in Root Zone of Mature Walnut under Drip Irrigation in South Xinjiang |
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JIAO Ping, Hudan Tumarday, Milixiati Minadola
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College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi
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| Abstract: |
| [Objective] to study the root distribution and soil water movement of mature walnut under drip irrigation in southern Xinjiang, and to provide scientific guidance for the establishment of irrigation system of mature walnut. [Methods] the 11-year-old walnut trees in Aksu area were selected as the research object, and the numerical simulation of soil moisture under the condition of surface drip irrigation was carried out based on the software of hydras-2d. [results] 1) the roots were mainly distributed in the range of 0-120cm in horizontal direction and 0-60cm in vertical direction. 2) The drip irrigation belt should be placed 60 cm away from the tree, and the vertical infiltration of reclaimed water treatment irrigation can reach 60 cm and the uniformity is more than 87%. 3) The accuracy of calibration and validation of Hydrus 2D model is high, RMSE is in the range of 0.016 ~ 0.022cm 3.cm-3, re is in the range of 0.04 ~ 0.12, R2 is in the range of 81.03% ~ 97.19%, which shows that the model is more reliable in simulating soil water movement. [Conclusion] Based on the study of root distribution and soil wetted area of 11-year-old walnut trees under different irrigation quota conditions combined with the Hydrus 2D model, it is concluded that the drip irrigation zone of mature walnut trees should be arranged at a distance of 60cm from the trees, and the reclaimed water treatment with the irrigation quota of 450m3.hm-2 should be used as the guiding irrigation quota for surface drip irrigation of mature walnut trees. |
| Key words: Walnut; drip irrigation; soil wetted area; numerical simulation; hydraus-2d |
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