| 引用本文: | 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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| 摘要: |
| 【目的】研究南疆滴灌成龄核桃根系分布和根区土壤水分运动规律,为南疆成龄核桃灌溉制度的确立提供科学指导。【方法】以阿克苏地区进行地表滴灌的11年生成龄核桃树为研究对象,基于HYDRUS-2D软件进行地表滴灌条件下的土壤水分数值模拟研究。【结果】结果1根系水平方向主要分布在0~120cm范围,垂直方向主要分布于0~60cm范围;结果2滴灌带应布设于距树60cm处；中水处理灌后垂直向浸润可达到60cm且均匀度>87%。；结果3 Hydrus 2D模型率定和验证精度较高,RMSE在0.016~0.022cm3.cm-3范围,RE为0.04~0.12范围,R2为81.03%~97.19%范围,表明模型模拟土壤水分运移较可靠。【结论】在研究不同灌水定额条件下11年生核桃树的根系分布和土壤湿润区结合Hydrus 2D模型,得出成龄核桃的滴灌带应布设于距树60cm处,灌溉定额为450m3.hm-2的中水处理作为成龄核桃果树地表滴灌的指导灌溉定额。 |
| 关键词: 核桃;灌;土壤湿润区数值模拟;HYDRUS-2D |
| DOI： |
| 分类号:S275.6 |
| 基金项目:国家自然科学基金51469033 |
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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 |
