排灌机械工程学报
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排灌机械工程学报  2016, Vol. 34 Issue (1): 66-72    DOI: 10.3969/j.issn.1674-8530.15.0098
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秸秆颗粒形态对沟灌入渗特征影响的试验研究
郑健1,3, 王燕1,3, 蔡焕杰2, 张恩继1,3, 孙雨欣1,3
1.兰州理工大学西部能源与环境研究中心, 甘肃 兰州 730050; 2.西北农林科技大学旱区农业水土工程教育部重点实验室, 陕西 杨凌 712100; 3.西北低碳城镇支撑技术协同创新中心, 甘肃 兰州 730050
Experimental investigation into effects of maize leaf and straw fragments on soil water infiltration characteristics in furrow irrigation
ZHENG Jian1,3, WANG Yan1,3, CAI Huanjie2, ZHANG Enji1,3, SUN Yuxin1,3
1.China Western Energy & Environment Research Center, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Key Laboratory of Agricultural Soil and Water Engineering in Arid Area of Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China; 3. China Northwestern Collaborative Innovation Center of Low-carbon Urbanization Technologies, Lanzhou, Gansu 730050, China
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摘要 为了探明秸秆粉碎颗粒形态对沟灌土壤水分运移特征和土壤质量含水率分布状况的的影响,采用具有不同秸秆粉碎形态的玉米叶(片状)和玉米芯(颗粒状),进行了室内试验研究,并采用HYDRUS-2D软件对不同处理湿润锋运移情况进行了模拟.结果表明:具有片状形态的玉米叶各处理,随混掺比例及埋深的不同,均能降低土壤的入渗率,而具有颗粒形态的玉米芯处理显著增加了土壤入渗率;玉米芯混掺处理表明在埋深(10,15] cm设置混掺层能增大土壤的垂向运移距离,18%土壤质量含水率等值线垂向距离明显大于埋深(5,10] cm处理的;玉米叶不同埋深处理表明埋深(10,15] cm比(5,10] cm更能增加18%土壤质量含水率等值线的水平距离;3%Y10~15(混掺比例3%,玉米叶,埋深(10,15] cm)处理最大土壤质量含水率值达到21%,而其垂向运移距离最短,说明该处理能够有效地阻滞水分的垂向入渗,增强植物混掺层上部土壤质量含水率;采用HYDRUS-2D软件模拟的湿润锋运移值与实测值误差在3%以内,说明其能够准确描述植物混掺条件下沟灌入渗过程中的湿润锋运移特征.
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郑健
王燕
蔡焕杰
张恩继
孙雨欣
关键词秸秆   颗粒形态   沟灌   入渗特征   土壤质量含水率   试验     
Abstract: To clarify effects of straw fragments on soil water infiltration characteristics and water content distribution in the soil in furrow irrigation, a series of experiments are carried out in laboratory by using maize leaf and straw fragments with different sizes, proportions and depths buried. In addition, the wetting front movement of soil water in different treatments is simulated with the software of HYDRUS-2D. The results show that soil water infiltration rate is decreased in the cases with maize leaf fragments, but increased in the cases with maize straw fragments significantly. For the cases with maize straw fragments, the soil vertical infiltration distance is increased if the fragments are buried in a depth of 10-15 cm, and the vertical distance of 18% soil water content contours is greater than that if the fragments are buried in 5-10 cm depth. In the cases with maize leaf fragments, the horizontal distance of 18% soil water content contours is increased when the fragments are buried in 10-15 cm depth compared with 5-10 cm depth. In the case that the soil is blended with 3% maize leaves in 10-15 cm depth, the maximum soil water content can be as high as 21%, and the vertical infiltration distance is the shortest. This implies that in this treatment the water movement in the vertical direction has been obstructed effectively and the water content in the soil above the buried layer is increased simultaneously. Meanwhile, the error of wetting front movement between experiment and simulation of HYDRUS-2D is less than 3%, suggesting the software demonstrate the behavior of wetting front movement accurately.
Key wordsstraw   particle morphology   furrow irrigation   infiltration characteristics   soil water content   experiment   
收稿日期: 2015-05-07;
基金资助:国家自然科学基金资助项目(51369014);甘肃省教育厅科研项目(2013A-038);兰州理工大学红柳青年教师培养计划项目(Q201413)
通讯作者: 王燕(1982—),女,甘肃靖远人,讲师,硕士(wangyan821108@163.com),主要从事节水灌溉理论研究.   
作者简介: 郑健(1981—),男,甘肃会宁人,副教授,博士(zhj16822@163.com),主要从事水资源高效利用研究.
引用本文:   
郑健,,王燕等. 秸秆颗粒形态对沟灌入渗特征影响的试验研究[J]. 排灌机械工程学报, 2016, 34(1): 66-72.
ZHENG Jian-,,WANG Yan- et al. Experimental investigation into effects of maize leaf and straw fragments on soil water infiltration characteristics in furrow irrigation[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(1): 66-72.
 
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