秸秆条施对土壤水分运移分布的影响

Influence of Straw Row Application on Moisture Migration Distribution

通过室内试验,研究了秸秆条施深度对一维垂直入渗情况下土壤水分入渗和分布的影响。结果表明,1秸秆条施深度对累计入渗量有影响,相同入渗时间下不同条施深度的累计入渗量大小顺序为:深6 cm宽4 cm>深4 cm宽4 cm>深2 cm宽4 cm>不施秸秆;2秸秆条施深度对垂直湿润锋运移距离大小顺序与累积入渗量大小顺序相同;3不同秸秆条施深度的土壤含水率的分布规律相似,土壤含水率等值线在秸秆条施附近近似呈半圆形,在湿润锋附近近似为直线,且距离秸秆条施处越远,土壤含水率分布曲线越密集;相同入渗时间下,深6 cm宽4 cm处理土壤平均含水率最高,其次是深4 cm宽4 cm处理。秸秆条施深度对于土壤水分运移分布有影响。

Through indoor soil bin experiment, straw row application depth was studied in a one-dimensional vertical infiltration under the influence of soil water infiltration and distribution. The results showed that straw row application depth affected the cumulative infiltration amount, in the same infiltration time under different row application the depth, the cumulative infiltration amount order was 6 cm deep 4 cm wide 〉 4 cm deep 4 cm wide〉 2 cm deep 4 cm wide 〉don＇t put the straw; Straw row application transport rate of the vertical wetting front was the same with that of the cumulative infiltration; The depth of straw different row application distribution regularity of soil moisture content was similar, the soil moisture content contour lines were approximate semicircle near the straw row application and was straight near the wetting front, the greater the distamce at the straw row application farther, soil moisture distribution curve were more intensive; With the same infiltration time, the highest average soil moisture content was 6 cm deep 4 cm wide, the second was 4 cm deep 4 cm wide. Straw row appli- cation depth has influence on the soil water movement and distribution