北京林业大学学报2017，Vol.39Issue(12)：44-51,8.DOI:10.13332/j.1000-1522.20170219
长武塬边坡不同植被下土壤团聚体及入渗特征
Soil aggregates and infiltration characteristics under different vegetations in Changwu tableland slope of northwestern China
摘要
Abstract
Soil and water loss in loess tableland slope had been widely concerned as a hot issue. In this paper, sites with three vegetation types ( Robinia pseudoacacia, Platycladus orientalis and grassland) located in Changwu tableland slope of northwestern China were chosen as research objects. Our aim is to explore the effects of different vegetation types on soil aggregates and infiltration capacity, the mean weight diameter ( MWD) and fractal dimension ( D) of soil water-stable aggregates in layer of 0--30 cm, the soil organic carbon content (SOC) and the steady infiltration rate (SIR) were measured on May 2016. The results showed that:the MWD and D of soil water-stable aggregates in layer of 0--30 cm, SOC and SIR in the site of R. pseudoacacia land were 2. 63 mm, 2. 60, 5. 62 g/kg and 10. 40 mm/min, respectively;in P. orientalis land, they were 3. 67 mm, 2. 60, 4. 87 g/kg and 5. 41 mm/min; in the grassland, they were 2. 44 mm, 2. 58, 6. 07 g/kg and 12. 45 mm/min. Results showed that soil structure, organic carbon content and infiltration capacity of grassland and R. pseudoacacia land performed better than that of P. orientalis land, and were beneficial to the conservation of soil and water in Changwu tableland slope. P. orientalis land showed the advantage of shaping large aggregates, while its soil organic carbon content and water infiltration capacity were relatively low and not advantaged for rainfall infiltration. So it is recommended to plant evergreen tree ( Platycladus orientalis) moderately, and design rational distribution of different vegetation types in this area.关键词
长武塬边坡/植被类型/土壤团聚体/土壤入渗率Key words
Changwu tableland slope/vegetation type/soil aggregates/soil infiltration rate分类
农业科技引用本文复制引用
丁康,徐学选,陈文媛,Shahmir Ali Kalhoro..长武塬边坡不同植被下土壤团聚体及入渗特征[J].北京林业大学学报,2017,39(12):44-51,8.基金项目
国家自然科学基金项目(41471439、41171421). （41471439、41171421）
