Study on influence of different agricultural residue film amounts on soil infiltration process of light sierozem

• Main Authors: BAI Yi-ru, ZHANG Xing, WANG You-qi, ZHAO Yun-peng, WANG Yu
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2019-03-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: residual film, soil moisture, infiltration, model, Ningxia
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2019/2/20190213.htm
• ISSN: 2095-6819; 2095-6819

In order to explore the effects of different residual film amounts on the infiltration performance of soil water, five residual film treatments were conducted:0(T0), 100(T1), 200(T2), 400(T3), 800 kg&#183;hm^-2(T4) with the object of light sierozem in Yinchuan Plain. One-dimensional vertical constant head infiltration method was used to observe soil water movement under different amounts of residual film. We also simulated soil water infiltration process with 4 infiltration models and evaluated their applicability. The results showed that the cumulative infiltration decreased with the increase of the residual amounts. When the infiltration time was 390 min, the cumulative infiltration decreased by 4.7%, 5.8%, 6.3%, 11% for T1~T4 treatments contrast to T0, respectively. The migration distance of dripping wet front in the same time was shorter with the increasing of the residual amounts in the soil. The infiltration time of T0~T4 treatment were 390, 420, 510, 600, 660 min at the end time of infiltration, respectively, which indicated that infiltration time was prolonged with the increasing of residual amounts. The stable infiltration rate of T0~T4 was 0.27, 0.24, 0.21, 0.19, 0.16 mm&#183;min^-1, respectively, which indicated infiltration rate decreased with the increasing of residual amounts. The <i>R</i>² of the fitted infiltration models was as follow:Common experienced model > Kostiakov model > Philip model > Horton model. The common experienced model was more effective than the other models, and it was suitable to describe the soil water infiltration process with residual film. The study indicated that the agricultural residue had a hindering effect on soil water infiltration for light sierozem in Yinchuan Plain, and the influence degree would aggravate with the increase of the residual amounts.