摘要
[目的]研究北京温榆河流域周边河岸带景观结构与土壤碳储量响应,为岸边带生态系统的恢复重建提供科学依据。[方法]以位于北京城郊区的温榆河昌平段为研究区,分别采集岸边带自然植被、半自然植被、人工植被3种植被类型0~20、20~40、40~60 cm的土层土样,研究土壤有机碳垂直分布特征。[结果]0~20 cm土壤有机碳密度为1.8420 kg/m2,20~40 cm为1.6912 kg/m2,40~60 cm为1.4602 kg/m2。自然植被0~20 cm土壤有机碳密度为2.3264 kg/m2,20~40 cm为2.4133 kg/m2,40~60 cm为1.3774 kg/m2；半自然植被0~20 cm土壤有机碳密度为1.6736 kg/m2,20~40 cm为1.5451 kg/m2,40~60 cm为1.3604 kg/m2；人工植被0~20 cm土壤有机碳密度为1.7515 kg/m2,20~40 cm为1.4306 kg/m2,40~60 cm为1.3947 kg/m2。[结论]温榆河河岸带土壤0~60 cm的碳含量随着土壤深度的增加呈垂直变化,各土层土壤碳含量从大到小依次为0~20、20~40、40~60 cm；各植被类型的土壤碳含量由大到小依次为自然植被、半自然植被、人工植被。
Abstract
[ Objective] To research the structure and soil carbon reserves response of riparian zone landscape surrounding Beijing Wenyu Riv-er Basin, and to provide scientific basis for the reconversion of shore zone ecosystem. [ Method] With Changping section of Wenyu River in Beijing suburb as the research region, soil samples at 0-20, 20-40 and 40-60 cm were collected from three vegetation types of natural veg-etation, seminatural vegetation and artificial vegetation. Vertical distribution characters of soil organic carbon were researched. [ Result] Or-ganic carbon densities at 0-20, 20-40 and 40-60 cm soils was 1. 842 0, 1. 691 2 and 1. 460 2 kg/m2 , respectively. Soil organic carbon densities of natural vegetation at 0-20, 20-40 and 40-60 cm were 2. 326 4, 2. 413 3 and 1. 377 4 kg/m2 , respectively. Soil organic car-bon densities of seminatural vegetation at 0-20, 20-40 and 40-60 cm were 1. 673 6, 1. 545 1 and 1. 360 4 kg/m2 , respectively. Soil or-ganic carbon densities of artificial vegetation at 0-20, 20-40 and 40-60 cm were 1. 751 5, 1. 430 6 and 1. 394 7 kg/m2 , respectively. [ Conclusion] Soil carbon content at 0-60 cm in riparian zone of Wenyu River Basin shows vertical change with the increase of soil depth. Carbon content in different soil layers from big to small is in the order of 0-20, 20-40 and 40-60 cm. Soil carbon content of different vege-tation types from big to small is in the order of natural vegetation, seminatural vegetation and artificial vegetation.
国家科技期刊平台
NSTL
维普
万方数据