Effects of Organic Compound Fertilizers on Soil Water Infiltration Characteristics  

作　　者：Jianqi LAN Shiyou XIE 

机构地区：[1]School of Geography Sciences,Southwest University,Chongqing 400715,China [2]Key Laboratory of the Three Gorges Reservoir Region's Eco-environment,Ministry of Education,Chongqing 400715,China

出　　处：《Agricultural Biotechnology》2020年第4期104-110,167,共8页农业生物技术（英文版）

基　　金：Supported by National Key Program of Science and Technology(2006BAC01A16);Natural Science Foundation Project of Chongqing(CSTC,2009BA0002);The special fund project for the scientific reserch of the forest public welfare industry(No.201204212).

摘　　要：In order to study the effects of organic compound fertilizers on soil water infiltration characteristics,an indoor one-dimensional soil column water infiltration test was carried out.Six soil sample treatment groups were set,namely marshy solonchak(control check,CK for short),bamboo charcoal-mixed marshy solonchak,Difuyuan-mixed marshy solonchak,salined flavo-aquic soil(CK),bamboo charcoal-mixed salined flavo-aquic soil and Difuyuan-mixed salined flavo-aquic soil.After 120 min of infiltration,compared with the CK groups of marshy solonchak and salined flavo-aquic soil,the cumulative infiltration volumes of the bamboo charcoal and difuyuan treatment groups increased by -18.78%,-3.93% and 25.77%,6.53%,respectively;and the displacement increased by -18.93%,1.64% and 22.6%,12.5%,respectively.The relationship between the wetting front displacement and time conformed to a linear function.The effects of organic compound fertilizers on the initial infiltration rates of marshy solonchak and salined flavo-aquic soil were significant,and the relationship between infiltration rate and time conformed to a power function.The vertical distribution of soil moisture under the application of organic compound fertilizers showed that the moisture content changed relatively small within 5 cm of the surface soil layer,then decreased slowly within 5-10 cm of the soil layer,and decreased drastically below 10 cm of soil layer;and relative to the CK group,the application of organic compound fertilizers was beneficial to increase the moisture content of salined flavo-aquic soil.The organic compound fertilizers reduced the water infiltration capacity of marshy solonchak and improved the water infiltration capacity of salined flavo-aquic soil.Compared with Difuyuan,bamboo charcoal reduced the water infiltration capacity of marshy solonchak better and improved the water permeability of salined flavo-aquic soil more significantly.

关 键 词：Organic compound fertilizer Wetting front Cumulative infiltration volume Infiltration rate Soil moisture 

分 类 号：S152.7[农业科学—土壤学]