水保所知识产出(1956---)知识库

为研究不同残膜量对土壤水分入渗的影响，通过室内土箱模拟试验，研究了滴灌条件下6 个残膜添加量
（0、80、160、320、640 和1 280 kg/hm2）处理分别对土壤入渗率、湿润锋运移距离及水分分布的影响，比较了Kostiakov
模型、Philip 模型和Green-Ampt模型对含残膜土壤水分入渗过程的适用性。结果表明，残膜延长了土壤水分入渗时
间，入渗至45 cm土层深度时入渗历时随残膜量增加而增大；入渗一定时间，含残膜的入渗曲线与无残膜曲线分离，
分离时间随残膜量增加而提前，分离时间与残膜量之间呈对数函数减小；Kostiakov 模型更适合模拟含残膜土壤的
入渗过程；湿润锋运移距离与入渗时间呈幂函数增长关系，但湿润锋运移距离随残膜量增加而递减；随残膜量增
加，作物适宜生长区和水分分布重心逐渐上移。残膜对土壤水分入渗有较大不利影响，其影响程度随残膜量增加
而增大。

In order to explore the effects of different residual plastic film quantities in soil on water infiltration,
the applicability of Kostiakov model, Philip model and Green-Ampt model to simulate the water infiltration process
in soil containing residual plastic film was compared. Six residual plastic treatments ( 0, 80, 160, 320, 640,
1 280 kg/hm2) were conducted to investigate the influences of different residual plastic film quantities on soil infiltration
rate, wetting front moving distance and water distribution under drip irrigation through indoor soil box
simulation experiment method. The results indicated that residual plastic film prolonged infiltration time, and the
consuming time that water infiltrated to 45 cm increased with increase of residual plastic film. The infiltration
rate curve of treatments containing residual plastic film would separate with T0 treatment when water infiltrated
to a certain depth. Separated time was shortened and logarithmically decreased. Compared with Philip model and
Green-Ampt model, Kostiakov infiltration model was more suitable to simulate the process of water infiltration
in soil containing residual plastic film. Wetting front moving distance increased exponentially with the prolonging
of infiltration time, while there was a negative correlation between wetting front moving distance and accumulative
quantities of residual plastic film. Residual plastic film had an adverse effect on the process of soil water infiltration,
which the disadvantageous effect would aggravate with the increment of residual plastic film.