明沟排水条件下的土壤水盐运移模拟

doi:10.13866/j.azr.2018.06.06

摘要/Abstract

摘要： 基于新疆生产建设兵团农八师122团盐碱地排水沟的排水试验,通过控制田间灌溉,监测田间土壤盐分变化,并建立HYDRUS数值模型,模拟分析了明沟排水条件下盐碱地棉花一个生育周期内盐分变化情况。结果表明:0~80 cm土层平均脱盐率达到了50.09%,80~200 cm土层盐分总量基本保持不变,0~200 cm盐分整体下降约25%;距明沟的距离越近,排盐的效率越高;数值模型模拟值与实测值较吻合,可以较好地反应试验的真实情况。该研究结果可为干旱、半干旱地区盐碱化治理提供参考。

关键词: 膜下滴灌, 明沟排水, 土壤水盐运移, 数值模拟, 新疆生产建设兵团

Abstract: In this study, the change of saline-alkaline soil salinity in 122nd State Farm of Xinjiang Corps of Production & Construction was monitored by controlling field irrigation. The purposes of the study were to explore the soil water and salt migration under the conditions of drip irrigation, plastic film mulching and open-ditch drainage, develop a HYDRUS numerical model, and simulate and analyze the change of soil salinity in cotton growth period. The results showed that the average desalination rate of 0-80 cm soil layer reached 50.09%, the total salinity of 80-200 cm soil layer was basically maintained, and the salinity of 0-200 cm soil layer was decreased by about 25%. The closer the place from the ditch was, the more efficient the soil desalination would be. The values simulated with the numerical model were in a good accordance with the measured values. The research results could be referred in field management in arid and semiarid saline-alkaline areas.

Key words: drip irrigation under mulch, open-ditch drainage, soil water and salt migration, numerical simulation, Xinjiang Corps of Production and Construction

李开明, 刘洪光, 石培君, 李鑫鑫. 明沟排水条件下的土壤水盐运移模拟[J]. 干旱区研究, 2018, 35(6): 1299-1307.

LI Kai-ming, LIU Hong-guang, SHI Pei-jun, LI Xin-xin. Simulation of Soil Water and Salt Migration Under Open-ditch Drainage[J]. Arid Zone Research, 2018, 35(6): 1299-1307.

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