PP棉孔径对涌泉根灌入渗特性的影响  

Effects of Pore Size of PP Cotton on the Infiltration Characteristics of Surge-root Irrigation

作　　者：郭子悦 代智光 任乐言 万奇霖 朱寄子星 李世纪 任利宇 蔡耀辉[5,6] GUO Ziyue;DAI Zhiguang;REN Leyan;WAN Qilin;ZHU Jizixing;LI Shiji;REN Liyu;CAI Yaohui(College of Water Resources and Architectural Engineering,Northwest A&F University’Yangling,Shaanxi 712100,China;Institute of Water-saving Agriculture in Arid in Northwest A&F University,'Yangling,Shaanxi 712100,China;College of Agricultural Engineering,Henan University of Science and Technology,Luoyang,He'nan 471003,China;Shaanxi Chongren Water Conservancy Engineering Co.,Ltd.,Xi'an,Shaanxi 710000,China;Institute ooSoil and Water Conservation,Northwest A&F University,Yangling,Shaanxi 712100,China;Institute A Soil and Water Conservation,Chinese Academy A Science&Ministry A Water Resources,Yangling,Shaanxi 712100,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]西北农林科技大学中国旱区节水农业研究院,陕西杨凌712100 [3]河南科技大学农业工程学院,河南洛阳471003 [4]陕西崇仁水利工程有限公司,陕西西安710000 [5]西北农林科技大学水土保持科学与工程学院,陕西杨凌712100 [6]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《水利与建筑工程学报》2023年第6期204-210,220,共8页Journal of Water Resources and Architectural Engineering

基　　金：国家重点研发计划项目(2021YFD1900700);国家自然科学基金项目(52069016);陕西省“两链”融合重点专项(2023LLRH-01);唐仲英基金会项目;西北农林科技大学大学生创新创业训练计划项目(NO.S202110712551)。

摘　　要：为探明将PP棉作为黄土高原苹果涌泉根灌配套套管时的最佳孔径,以陕西延安黄绵土为例,开展室内土箱试验,采用对比试验设计,研究不同孔径PP棉(1μm、10μm、20μm和50μm)作为涌泉根灌套管时对土壤水分入渗特性的影响。结果表明:不同PP棉孔径时,水分入渗所形成湿润体的形状均近似为椭球形,各方向湿润锋的运移距离与入渗时间均符合幂函数关系(P<0.05);通过对比不同PP棉孔径的湿润体特性,确定PP棉孔径为50μm时,湿润体的湿润锋运移距离、湿润体体积和湿润体内高含水率区域均最大,且在再分布过程中,湿润体内土壤水分分布也最均匀。研究结果可为套管参数选取提供理论依据,对涌泉根灌技术在黄土高原地区苹果园大面积推广具有重要意义。The surge-root irrigation supporting casing has significant effects on its outflow process.In order to find out the optimal pore size of PP cotton as a supporting casing for surge-root irrigation in apple on the Loess Plateau,an indoor soil box test was carried out on the example of Yan'an yellow sandy soil in Shaanxi Province,and a comparative experimental design was used to analyze the effects of different pore sizes of PP cotton(1μm,10μm,20μm and 50μm)on the soil moisture infiltration characteristics when used as a casing for surge-root irrigation.The results are as follows.Under different PP cotton pore sizes,the shape of the wetting body formed by water infiltration was approximately ellipsoidal,and the transport distance of the wetting front in each direction was in line with the power function relationship with the infiltration time(P<0.05).By comparing the characteristics of the wetting body with different PP cotton pore sizes,it was determined that when the pore size of the PP cotton was 50μm,the transport distance of the wetting front of the wetting body,the wetting body volume,and the region of high water content within the wetting body were all the largest,and the redistribution process was also the largest,and the redistribution process was the largest.In the redistribution process,the distribution of soil moisture in the wetted body is also the most uniform one.The results of the study can provide theoretical basis for the selection of casing parameters,which is of great significance for the large-scale popularization of surge-root irrigation in apple orchards in the Loess Plateau region.

关 键 词：涌泉根灌 湿润锋 湿润体 水分分布 孔径 

分 类 号：S275.4[农业科学—农业水土工程]