添加γ-聚谷氨酸的浑水膜孔灌单点源自由入渗特性  

Single-point free infiltration characteristics of muddy water film hole irrigation with γ-PGA additive

作　　者：陈琳[1] 费良军[1] 王子路 郭欣 曾建 杨扬[1] CHEN Lin;FEI Liangjun;WANG ZiLu;GUO Xin;ZENG Jian;YANG Yang(Institute of Water Resources and Hydro - electric Engineering, Xi＇an University of Technology, Xi＇an, Shaanxi 710048, Chin;Yellow River Institute of Hydraulic Research, Zhengzhou, Henan 450003, China;Shandong Freda Biological Technology Co Ltd. , Jinan, Shandong 250101, China)

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]黄河水利科学研究院,河南郑州450003 [3]山东福瑞达生物科技有限公司,山东济南250101

出　　处：《排灌机械工程学报》2018年第6期529-535,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51479161);公益性行业(农业)科研专项(201203003)

摘　　要：为探究聚谷氨酸对浑水膜孔灌条件下土壤水分入渗运动和土壤改良方面的影响,基于室内浑水膜孔灌单点源自由入渗试验,研究了不同γ-PGA施量配比(0,0.1%,0.5%,1.0%)对水分入渗及持水能力的影响.研究结果表明,对于累积入渗量,与处理C相比,处理C1、处理C2、处理C3的累积入渗量分别减小了17.27%,30.91%和42.73%,稳定入渗率分别减小了17.28%,35.79%和57.32%,但土壤饱和含水率分别增加了7.38%,35.27%和39.62%;Kostiakov公式中K值从0.132 8减小到0.070 7,α值从0.774 6增大到0.812 7;γ-PGA会阻碍垂直湿润锋运移,使得土壤水分保持在土壤根系吸水层,但对水平湿润锋的运移并没有阻碍作用,并且对土壤水分的水平运动有推进作用,0.5%γ-PGA施量效果最显著;另外,γ-PGA改变了土壤剖面水分分布,在浑水膜孔灌中,可将水分集中在土壤上层,提高灌溉水利用效率.In order to explore the effect of gamma-PGA on soil water infiltration and soil environmental improvement of muddy water film hole irrigation,the test of single-point free infiltration of muddy water Film Hole irrigation was used to study the soil water infiltration and water holding capacity with the different γ-PGA content being mixed with soil（ 0,0. 1%,0. 5%,1. 0%）. The results indicates that compared with treatment C,the cumulative infiltration volume of C1,C2,C3 are decreases by17. 27%,30. 91% and 42. 73%,respectively. The constant infiltration rate of C1,C2,C3 are decreased by 17. 28%,35. 79% and 57. 32%,respectively. But compared with treatment C,the saturated soil moisture content C1,C2,C3 are increased by 7. 38%,35. 27% and 39. 62%,respective-ly. The infiltration coefficient in Kostiakov formula reduced from 0. 132 8 to 0. 070 7 and the infiltration index increases from 0. 774 6 to 0. 812 7. γ-PGA hinders the migration of vertical wetting front and leads to keep the soil water in soil root water absorption layer. But γ-PGA has no effect on the migration of horizontal wetting front and has propulsion function on horizontal movement of soil water.The treatment with 0. 5% γ-PGA content is the best. In addition,γ-PGA can change the water distribution in soil profile. γ-PGA can concentrate water in the upper soil to satisfy the full water supply for crop seedling stage and improve irrigation water use efficiency.

关 键 词：Γ-聚谷氨酸 浑水膜孔灌 土壤持水能力 入渗特性 Kostiakov公式 

分 类 号：S277.9[农业科学—农业水土工程]