不同植被恢复模式对红原沙化草地土壤理化性质的影响  

Impact of Different Artificial Vegetation Restoration Pattern on the Physical and Chemical Properties of Desertification Grassland in Hongyuan County

作　　者：何群 席欢[2] 万婷[2] 

机构地区：[1]阿坝州环境监测中心站,四川阿坝624000 [2]四川省自然资源科学研究院,成都610090

出　　处：《四川环境》2017年第1期35-40,共6页Sichuan Environment

摘　　要：草地沙化是川西北地区生态环境恶化的显著问题之一,红原县是川西北草地沙化的代表。土壤理化性质在沙化治理过程中变化显著,能表征治沙效果的好坏。通过研究草本红景天、灌木(沙棘)、灌草结合红柳和沙棘及燕麦草混植三种植被恢复模式恢复一年对土壤理化性质的影响,分析了不同的植被类型对沙化草地的恢复效果,为进一步优化沙化草地植被恢复的群落结构,提高植被恢复的有效性提供理论依据。结果表明:草本植物、灌木及灌草结合三种植被修复模式均能明显增加土壤孔隙度、含水量、p H、有机质、含氮量、含磷量和含钾量,降低土壤容重,以增加土壤肥力,其中灌草结合的植被恢复模式对土壤修复的效果最好。Grassland desertification of northwest Sichuan province is one of the most significant problems of ecological environment deterioration, Hongyuan County is the representative in grassland desertification in northwest Sichuan. The change of physical and chemical properties of soil is significant in the process of desertification control, which signifies the effect of desertification control. The effects of three artificial vegetation restoration patterns which are rhodiola rosea （ herb）, hippophae rhamnoides （shrubs）, combination with Tamarix ramosissima and hippophae rhamnoides and tall oat grass on soil physical and chemical properties after one year recovery were analyzed, the impact of different types of vegetation on restoration was analyzed. This work provide theoretical basis for further optimizing community structure of vegetation restoration against grassland desertification, and improving the effectiveness of vegetation restoration. The results showed that three types of artificial vegetation restoration patterns which are herb, shrubs, combination with herb and shrubs can significantly increase soil porosity, pH, organic matter, nitrogen, phosphorus and potassium content in soil, , increase the soil fertility, and decrease soil bulk density. Overall, the combination with herb and shrubs control on desertification grassland has best effect.

关 键 词：草地沙化 人工植被恢复模式 土壤理化性质 

分 类 号：S4[农业科学—植物保护]