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草业学报 ›› 2016, Vol. 25 ›› Issue (7): 42-51.DOI: 10.11686/cyxb2015299

• 研究论文 • 上一篇    下一篇

北方地区植物篱系统土壤水分特征曲线模拟与分

何修道1, 党宏忠2, *, 王立1, 周泽福2, 吕文强1   

  1. 1.甘肃农业大学林学院,甘肃 兰州 730070;
    2.中国林业科学研究院荒漠化研究所,北京 100091
  • 收稿日期:2015-06-10 修回日期:2015-08-24 出版日期:2016-07-20 发布日期:2016-07-20
  • 通讯作者: hzdang@caf.ac.cn
  • 作者简介:何修道(1988-),男,甘肃张掖人,在读硕士。E-mail:xiudaohe@sina.com
  • 基金资助:
    “十二五”国家科技支撑计划课题“农田水土保持生物防护关键技术”(2011BAD31B020)资助

Simulation and analysis of soil water retention curves within and between hedgerows in Northern China farm system

HE Xiu-Dao1, DANG Hong-Zhong2, *, WANG Li1, ZHOU Ze-Fu2, LV Wen-Qiang1   

  1. 1.College of Forestry, Gansu Agricultural University, Lanzhou 730070, China;
    2.Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2015-06-10 Revised:2015-08-24 Online:2016-07-20 Published:2016-07-20

摘要: 以北方风沙区、黄土区、黑土区的典型植物篱为研究对象,在测定植物篱系统带内、带间部位土壤质地、土壤孔隙度、有机质含量、水稳性团聚体等指标的基础上,采用Van Genuchten模型模拟了不同地区植物篱土壤水分特征曲线。结果表明,风沙区、黑土区植物篱带内土壤孔隙度、有机质、水稳性团聚体含量均比带间高,黄土区植物篱带内土壤孔隙度、有机质、水稳性团聚体含量则比带间的低;各区域植物篱系统带内土壤含水率均比带间高,并且土壤持水力(土壤含水率)随着土壤水吸力的增大而减弱,风沙区植物篱带内、带间土壤持水力最弱,黑土区植物篱相应部位土壤持水力最高。说明植物篱具有改善土壤质地、结构,提高土壤含水率的作用,在治理坡面水土流失方面具有重要意义。

Abstract: This study aimed to simulate soil water retention curves within and between hedgerows of farm systems in northern China by the Van Genuchten model. Typical hedgerow systems in regions of sandy, loess and black soils were selected for study. The soil texture, soil porosity, soil organic matter and soil water-stable aggregates within and between hedgerows were measured. It was found that the soil porosity, soil organic matter and soil water-stable aggregates within hedgerows in sandy and black soil areas were higher than those from between hedgerows; but this result was adverse in loess area. The soil moisture content within hedgerows was higher than that between hedgerows. The soil water holding capacities within and between hedgerows were lowest in sandy soils and highest in black soils. It was concluded that hedgerows can improve soil texture, structure and soil water retention, and make an important contribution to control of sheet erosion on sloping land.