沙棘植物"柔性坝"沟道土壤水分时空动态变化研究

沙棘植物柔性坝是一种防止沟道土壤侵蚀、拦沙保水的新型生物工程,特别适合于生态环境恶劣的砒砂岩地区。在内蒙古准格尔旗砒砂岩地区东一支沟开展了沙棘植物柔性坝野外拦沙保水实验,结果表明,沙棘植物柔性坝各部位的土壤剖面含水量年内、年际时空动态变化有着明显的差异,沙棘植物柔性坝对沟道土壤水分具有显著的调节作用,降雨、地表植被种类、植被生长状况、土壤理化性质、地形和当地水文气象条件等是影响土壤水分时空变异的重要因子,而其中降雨和地表植被是主要影响因素。

Spatio-Temporal Dynamic Change of Soil Water in Gully with Seabuckthorn Plant "Flexible Dam"

Seabuckthorn plant flexible dam is a new biology project used in preventing soil erosion and sediment retention and conservation of water in gully, especially in soft rock region with serious environment. An experimental research in field on sediment retention and water conservation of seabuckthorn plant flexible dam is carried on in the small east-one-branch gully of the representative soft rock region in Zhun-Ge-er county in inner Mongolia. It is showed by the results that the flexible dam can strikingly regulate soil water in the gully channel,and the spatiotemporal dynamic change is obviously different in distribution of soil water in soil profile in different positions of seabuckthorn plant flexible dam in a year and several years,and the important factors affecting spatio-temporal chang of soil water are rainfall,categories of vegetation,growth status of vegetation,physical and chemical characteristics of soil,terrain and hydrology whether condition of local region etc. , while rainfall and condition of vegetation in gully channel are mainly affecting factors among those.