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

• Published in: Journal of agricultural resources and environment 2019-03, Vol.36 (2), p.227
• Main Authors: Yi-Ru, Bai, Zhang, Xing, You-Qi, Wang, Yun-Peng, Zhao, Wang, Yu
• Format: Article
• Language: Chinese
• Subjects: Agricultural engineering; Agriculture; Computer simulation; Crop residues; Infiltration; Infiltration rate; Moisture content; Regression analysis; Society; Soil infiltration; Soil water movement; Soils; Water infiltration; Water treatment
• ISSN: 2095-6819; 2095-6819
• DOI: 10.13254/j.jare.2018.0084

为探讨不同残膜含量对土壤入渗性能的影响，以银川平原淡灰钙土为研究对象，设置5组不同残膜量：0（T0）、100（T1）、200（T2）、400（T3）、800 kg·hm-2（T4），利用一维垂直定水头入渗法，观测湿润锋运移规律和水分入渗过程，并利用4种入渗模型拟合土壤入渗过程，分析其适用性。结果表明，随残膜含量递增，在同一入渗历时内累积入渗量逐渐减小。当入渗时间为390 min时，与T0相比，T1~T4处理的累积入渗量分别减少4.7%、5.8%、6.3%、11%。在入渗同等时间内，残膜量越高其湿润锋运移距离越短。当湿润锋在土柱完成运移时，T0~T4处理分别耗时390、420、510、600、660 min，即随残膜含量的升高入渗时间延长。T0~T4稳定入渗速率分别为0.27、0.24、0.21、0.19、0.16 mm·min-1，入渗率随残膜含量的升高而降低。入渗模型拟合的R2大小依次为通用经验模型 > Kostiakov模型 > Philip模型 > Horton模型，通用经验模型适合描述含残膜土壤的水分入渗过程。研究表明残膜对淡灰钙土水分入渗存在抑制作用，其影响程度随残膜量增加而增大。 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·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 r