岷江上游干旱河谷区植被恢复对土壤物理性质的影响研究  

Study on the Effect of Vegetation Restoration on Physical Properties of Soil in the Arid Valley of the Upper Minjiang River

作　　者：赖元长 陆军 LAI Yuan-chang;LU Jun(Sichuan Forestry and Grassland Survey and Planning Institute,Chengdu 610081,China;Sichuan Changjiang Afforestation Bureau,Xichang 615000,China)

机构地区：[1]四川省林业和草原调查规划院,四川成都610081 [2]四川省长江造林局凉山分局,四川西昌615000

出　　处：《四川林勘设计》2019年第4期1-5,共5页Sichuan Forestry Exploration and Design

摘　　要：通过对典型样地采集0~10 cm、10~20 cm、20~30 cm、30~40 cm四个土层的土壤样品,测定研究了不同植被恢复措施的土壤孔隙度、土壤团聚体、土壤容重等土壤物理性质。样地类型分为:平荒地、陡荒地2个未恢复植被样地,岷江柏林、针阔混交林,刺槐林、白杨-旱柳混交林4个人工恢复植被样地,灌木林、次生林2个自然恢复植被样地。结果表明:未恢复植被类型和自然恢复植被类型的土壤孔隙度明显高于人工恢复植被类型;未恢复植被类型的土壤容重低于其它两种植被恢复措施;未恢复植被类型土壤中径级<2 mm的土壤团聚体含量明显高于其它两种植被恢复措施;人工恢复植被类型中的岷江柏林土壤质量相对较好。Soil physical properties such as soil porosity,soil aggregate and soil bulk density of different vegetation restoration measures were studied by collecting soil samples from four soil layers of 0~10 cm,10~20 cm,20~30 cm and 30~40 cm.The types of sample plots are as follows:two unrecovered vegetation plots of flat wasteland and steep wasteland;four artificial restoration vegetation plots of Cupressus chengiana,coniferous and broad-leaved mixed forest,Robinia pseudoacacia forest,mixed forest of Populus tomentosa and Salix matsudana;two natural restoration vegetation plots of shrub forest and secondary forest.The results show that the soil porosity of the unrecovered vegetation type and the natural vegetation type is significantly higher than that of the artificial vegetation type;the soil bulk density of the unrecovered vegetation types is lower than that of the other two vegetation restoration measures;the soil aggregate<2 mm in the unrecovered vegetation types is significantly higher than that of the other two vegetation restoration measures;the soil quality of Minjiang Berlin is relatively good in the artificial vegetation types.

关 键 词：植被恢复 土壤物理性质 干旱河谷 

分 类 号：S15[农业科学—土壤学]