农田降水渗透深度的影响因素  

Affecting factors of precipitation infiltration depth in the field

作　　者：方文松[1] 刘荣花[1] 朱自玺[1] 马志红[1] 

机构地区：[1]中国气象局河南省农业气象保障与应用技术重点开放实验室河南省气象科学研究所,河南郑州450003

出　　处：《干旱地区农业研究》2011年第4期185-188,207,共5页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(40875071);河南省气象科学技术研究项目(Z200906);农业科技成果转化资金项目(2008GB24160440)

摘　　要：根据农田水分平衡原理和溢满渗透理论,利用2006-2009年河南省4个土壤水分自动观测站点的土壤湿度监测资料和水分渗透模型,分析了降水渗透深度与影响因子之间的关系。结果表明：降水渗透深度与初始土壤湿度、过程降水量和雨后日数有明显的线性关系,随着三者的增大而渗透深度加深;其中初始土壤湿度影响最大,过程降水量和雨后日数相继其后。土壤性质对渗透深度的影响是：当土壤质地由轻变重,或由砂变粘,则渗透深度由深变浅。Based on the theory of water balance in farmland and brimming infiltration,the relationship between precipitation infiltration depth and its impact factor was analyzed by taking use of soil moisture monitoring data from 2006-2009 of four sites of automatic soil water observation stations as well as water infiltration model.The results showed that there existed a linear relationship between infiltration depth and initial soil water content,amount of individual precipitation process,and the days after precipitation,and it increased with the increase of three factors,especially with initial soil water content.Infiltration depth was also affected by soil texture.With soil texture getting heavier or from sandy to clay,the infiltration depth decreased.

关 键 词：渗透 降水 土壤湿度 雨后日数 土壤质地 

分 类 号：S152.72[农业科学—土壤学]