Relationship between the Soil Moisture and the Vegetation Productivity in the Loess Plateau
ZHANG Leiming 1,2 SHANGGUAN Zhouping 1 (1.Institute of Water and Soil Conservation, Chinese Academy of Sciences, Yangling Shanxi, 712100, China) (2.Institute of Geography and Natural Resources Research, Chinese Academy of Sciences, Beijing 100100, China)
The Loess Plateau is one of the regions with the most serious soil erosion and the most vulnerable ecological environment in the world. It is the fundamental measure for controlling soil erosion and improving the ecological environment to implement the withdrawing from farming to afforesting, plant trees and grasses, and restore the vegetation. However, some problems demanding prompt solution exist in the current vegetation and ecological construction due to the peculiar natural resources and the ecological environment conditions. The shortage of water resources and the poor soil moisture ecological conditions are the main restricting factors for the vegetation construction and the ecological environment construction in the Loess Plateau. Based on the analysis on the soil moisture ecological factors of the Loess Plateau, this paper discusses the seasonal change of the soil moisture, change of the soil moisture along the soil sections, and the differentiation patterns of the regional soil moisture. The relationship between the soil moisture and the vegetation productivity is analyzed, and some measures are put forward for improving the soil moisture and the ecological environment and for increasing the vegetation productivity in the Loess Plateau.