晋西北不同植被类型土壤水分亏缺特征  

The characteristics of water deficit in various vegetation soils in northwestern Shanxi Province

作　　者：王玲[1] 刘庚[1] 冯向星 牛俊杰[1] 

机构地区：[1]太原师范学院历史地理与环境变迁研究所,山西晋中030619

出　　处：《中山大学学报（自然科学版）》2018年第1期102-109,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金项目(41171423)

摘　　要：为了解人工水土保持林地土壤水分变化特征及亏缺现状,对区域植被恢复提供理论依据。对晋西北岚县典型人工林和对照样地撂荒地进行土壤水分测定,通过构建土壤水分亏缺定量评价模型,对柠条林(Cartagena korshinskii)、油松林(Pinus tabuliformis)和撂荒地雨季和非雨季的土壤储水量和土壤水分亏缺指数进行计算。结果表明:(1)随土层深度增加,3种植被的土壤剖面含水量均呈先降低后升高趋势,柠条、油松林土壤剖面含水量分别在300和400 cm深度后呈降低趋势,撂荒地土壤剖面含水量变化呈增长型,土壤含水量最高;(2)3种植被类型的土壤储水量和土壤有效储水量变化趋势相同,均表现为:撂荒地>柠条>油松,土壤水分相对亏缺量表现为:油松>柠条>撂荒地;(3)柠条、油松林地存在明显亏缺现象,样地土壤水分平均相对亏缺指数分别为0.24、0.69,撂荒地为-0.19。油松林地的土壤水分亏缺程度高于柠条林和撂荒地。We aimed to clarify the variation characteristics of soil water and the soil water deficit of artificial forestland in order to provide theoretical support for the selection of vegetation types and ecological restoration pattern. It was necessary to measure soil water in Northwestern Shanxi Loess hilly regions in Lan county. The moisture storage capacity and soil water deficit index of Cartagena korshinskii, Pinus tabuliformis and abandoned land in soil profiles of 0-600 cm depth were calculated to quantify soil water deficit during the rainy season and non rainy season. The results showed that ： ① The soil water changed with vegetation types, and even for the same vegetation type, the soil water was not consistent with other soil layers. The soil water content of 3 vegetation types showed first decreasing and then increasing trend with soil depth on the whole. Soil water profile contents of Cartagena korshinskii and Pinus tabuliformis showed a decreasing trend in the depth of 300 cm and 400 cm, respectively. In addition, the soil water content of abandoned land was higher than that of other artificial forestlands, and presented increasing type. ② The effective moisture storage capacity range showed the same trend for 3 vegetation types, with abandoned land〉Cartagena korshinskii〉 Pinus tabuliformis, and the deficit soil water storage presented Pinus tabuliformis〉Cartagena korshinskii〉abandoned land. ③ There was a significant deficit phenomenon of Cartagena korshinskii and Pinus tabuliformis. The plot compared soil water deficit index of Cartagena korshinskii land and Pinus tabuliformis land was 0 24, 0 69, respectively. Nevertheless, the plot compared soil water deficit index of abandoned land was only -0 19. Therefore, the water deficiency of Pinus tabuliformis land was worse than that of other soil types as a whole.

关 键 词：土壤水分亏缺 人工林地 植被类型 晋西北 

分 类 号：S152.7[农业科学—土壤学]