贵州人工草地-农田界面土壤温度影响域研究

Edge Influence of Soil Temperature on Cultivated Pasture-Farmland Boundary in Guizhou Province

以贵州人工草地-农田景观界面为研究对象,采用移动窗口法研究了人工草地-农田界面表层土壤（0～20 cm）温度影响域.结果表明：研究区人工草地-农田界面土壤温度在空间上是变化的,人工草地和农田系统之间存在着复合功能区（即界面影响域）;土壤温度在界面影响域变化剧烈,而在农田和草地区域基本上呈线性形状分布,农田生态系统土壤平均温度比草地高1.08℃.研究区土壤温度界面影响域为农田8 m,草地22 rn,总宽度30 m,属渐变型界面.该研究结果可为南方生态交错区的科学管理和生态系统间物质运移机理的研究提供参考.

The agricultural-pasturage ecotone of Guizhou Province containing linear cropland and grassland was chosen to investigate soil temperature. The depth of edge influence on the surface soil temperature （0-20 cm） of cultivated pasture-farmland landscape boundary was detected by moving split-window tech- nique. Results showed that the soil temperature was abruptly changed in the boundary, whereas presented linear distribution in both cultivated pasture and cropland ecosystem. The average temperature of cropland was 1.08℃ higher than that of cultivated pasture. The depth of edge influence was 30 m, from 22 m in cultivated pasture to 8 m in cropland. These results provided a reference for the management of south eco- tone and the mechanism study of matter migration between ecosystems.