贵州岩溶山区土壤含水量时空分布与植物生长关系研究

The Space-time Distribution of Water Content of Desertifi-cation Soil and Their Relationship with Plant Growth in Karst Rocky Guizhou

本文研究喀斯特山区不同厚度土壤含水量在雨后和雨后数日的垂向分布特征、不同厚度土壤对应植物叶片的含水量以及其内在联系。结果表明在喀斯特石漠化山区的同一山体中,不同厚度土壤的同一深度的土壤含水量雨后远大于雨后连续数日的含水量;雨后不同厚度土壤的含水量垂向分布从地表向下呈递减趋势,而雨后数日则呈递增趋势;相对应的山区植物(花椒)叶片含水量也与降雨有很大关系,其叶片含水量与表层土壤含水量没有明显的关系,但与土壤的厚度呈正相关。对喀斯特山区石漠化治理有着重要的意义。

In this paper, we investigated characters of vertical distribution in water content in different soil thickness after rain a few days and after rain, water content of corresponding plant leaves and their intrinsic link. Results showed that the soil moisture in the same depth of different soil thickness after rain was much greater than the water content a few days after rain in karst rocky mountains of Guizhou. After rain, soil moisture of different thickness was vertical distribution which showed a decreasing trend from the surface downward, but vertical distribution had an increasing trend a few days after rain. The water content of corresponding plant leaves （Zanthoxylum bungeanura Maxim） had arelationship with rainfall. The water content of leaves did not have an obvious relationship with moisture of surface soil, but the water content of leaves was positively correlated with the thickness of soil. The results were important to control karst rocky desertification in Guizhou Province.