水文地质工程地质2018，Vol.45Issue(2)：21-28,8.DOI:10.16030/j.cnki.issn.1000-3665.2018.02.04
干旱区膜下滴灌棉田SPAC系统水分通量模拟
Simulation of water flux of SPAC continuum in a cotton field under mulched drip irrigation in an arid area
摘要
Abstract
Knowledge of the law of soil water movement and SPAC continuum water flux in cotton fields under drip irrigation with the common style of one mulched with six rows in the Xinjiang arid region is of great significance to realize agricultural water-saving irrigation.In this study,soil water numerical model is built with the Hydrus-2D and calibrated with the experimental data to discuss water flux in cotton field SPAC continuum under mulched drip irrigation.The results show that under the periodic irrigation a divergent curved surface of zero flux occurs at a depth of 50-70 cm below the land surface.During the whole simulation period,irrigation is the main source of inflow water,accounting for 87.6％ of the inflow water.More than 70％ of the inflow water is consumed by cotton,while soil evaporation and deep percolation account for only 8.2％ and 20.8％,respectuvely.The utilization efficiency of agricultural water is 85.2％.The simulation results suggest that the current drip irrigation with the style of one mulched with six rows can effectively reduce invalid evaporation and deep percolation and improve the utilization efficiency of irrigation water resource.关键词
Hydrus-2D模型/膜下滴灌/水分通量/干旱区Key words
Hydrus-2D model/mulched drip irrigation/water flux/arid area分类
农业科技引用本文复制引用
李惠,梁杏,刘延锋..干旱区膜下滴灌棉田SPAC系统水分通量模拟[J].水文地质工程地质,2018,45(2):21-28,8.基金项目
国家自然科学基金项目(U1403282) （U1403282）
