紫色土区林地土壤入渗性能试验研究  

Experimental Study on Soil Infiltration Capacity of Woodland in Purple Soil Area

作　　者：郝文静[1] 陈晓燕[1] 胡建新[1] 莫斌[1] 

机构地区：[1]西南大学资源环境学院/西南大学三峡库区生态环境教育部重点实验室,重庆北碚400716

出　　处：《中国农学通报》2015年第24期204-209,共6页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划项目"农田水土保持关键技术研究与示范"(2011BAD31B03);重庆市研究生科研创新项目"紫色土农耕地细沟侵蚀输沙过程研究"(CYS14054);西南大学资源环境学院大学生科技创新"光炯"培育项目"不同土壤入渗测定方法及其影响因素研究"(20140207)

摘　　要：土壤入渗是土壤水分运动的重要组成部分。为了准确测得紫色土区林地土壤入渗性能,用双环法和环刀法对其进行测定,并对2种方法的试验结果进行分析和比较,以探求其差异性所在。结果表明:2种方法测定土壤入渗性能各项指标(初渗速率、稳渗速率、平均入渗率)差别较大,它们主要受土壤理化性质及测定条件影响;在试验中双环法测得的初渗速率和平均入渗率差异性要比环刀法的大,稳渗速率则比环刀法小;双环法测得的入渗性能各项指标均值皆比环刀法的大,其中初渗速率大了2.36倍,稳渗速率大了2.17倍,平均入渗率大了2倍;采用4种常用入渗模型对双环法和环刀法测得的结果进行拟合时,其效果表现为:Horton模型>通用经验模型>Kostiakov模型>Philip模型,且环刀法比双环法好;土壤累计入渗量采用一元二次方程拟合比采用一元一次方程拟合好,一元二次方程拟合的决定系数R2都在0.99以上。该试验可以为紫色土区林地土壤入渗的研究提供资料参考。Soil infiltration is an important part of soil water movement. In order to study the soil iniiltration capacity of woodland in purple soil area, 2 infiltration methods （double-ring method and cutting ring method） were used to precisely evaluate the woodland infiltration capacity in purple soil area, and the results between 2 methods were analyzed and compared to explore the differences between them. The results showed that： there were some differences between infiltration capacity parameters （initial infiltration rate, stable infiltration rate, average infiltration rate） between these 2 infiltration methods, soil physicochemical properties and determination conditions had great influence on them. The differences of initial infiltration rate and average infiltration rate measured by cutting ring method were larger than that measured by double-ring method, but the steady infiltration rate was the opposite in the experiment. The average values of infiltration capacity parameters measured by double-ring method were larger than that measured by cutting ring method, the initial infiltration rate, stable infiltration rate, average infiltration rate of double-ring method were 2.36, 2.17 and 2 times bigger than that of the cutting ring method. The 4 commonly used soil infiltration models were adopted to fit the results of soil infiltration of these 2 methods, and the fitting effects of 4 models showed that： Horton model〉 general empirical model〉 Kostiakov model〉 Philip model, and the cutting ring method was better than double-ring method. Quadratic equation with one unknown was better than linear equation with one unknown in the fitting of soil cumulative infiltration amount, and the determination coefficients R2 of quadr~ with one unknown were above 0.99. The results could provide reference information for the woodland soil infiltration in purple soil area. tic equation research of

关 键 词：紫色土林地 土壤入渗性能 入渗测定方法 回归分析 

分 类 号：S152.7[农业科学—土壤学]