Effects of alternate moistube-irrigation on soil water infiltration  

作　　者：Lixia Shen Yumeng Zhang Mei Yang Ronghao Liu 

机构地区：[1]College of Water Conservancy and Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]College of Urban and Environmental Science,Northwestern University,Xi’an 710127,China

出　　处：《International Journal of Agricultural and Biological Engineering》2020年第4期151-158,共8页国际农业与生物工程学报（英文）

基　　金：This work was supported by the National Natural Science Foundation for Young Scientists of China(51809189);the Natural Science Foundation(201701D121109,201801D121266);the Key Research and Development Plan(201703D211020-2)of Shanxi Province,China.

摘　　要：Alternate moistube-irrigation is a new type of water-saving irrigation,and research on water infiltration with alternate moistube-irrigation is important for the design of irrigation schemes and helpful to understand and apply this technology.The effects of the pressure head(1.0 m and 1.5 m)and tube spacing(10 cm,20 cm,and 30 cm between two moistubes respectively)on soil water infiltration in alternate moistube-irrigation were studied in laboratory experiments,and the cumulative infiltration,discharge of the moistube,and shape and water distribution of the cross-section of the wetting front were determined.The cumulative infiltration increased quickly and linearly with the infiltration time at 0-96 h(R^(2)>0.99),and changed smoothly at 96-192 h with a basically steady infiltration rate.The discharge of the moistube increased rapidly at the beginning of irrigation,then decreased before stabilizing.The cumulative infiltrations and discharges of moistube under the 1.5 m pressure head were more than those under the 1.0 m pressure head.The shape of the cross-section of the wetting front for a single moistube was similar to a concentric circle.With the increase of tube spacing,the interaction between water infiltrations of two moistubes decreased.The soil water distributions around two moistubes were similar to each other under the 1.0 m pressure head and large tube spacing.When the tube spacing was 20 cm,the soil water distribution was more uniform around two moistubes.

关 键 词：alternate irrigation moistube-irrigation soil water infiltration water use efficiency water-saving irrigation 

分 类 号：S15[农业科学—土壤学]