黄土高原土壤水分与植被生产力的关系

土壤水分生态条件的恶化愈来愈成为黄土高原植被建设和生态环境建设的限制因素，我们在对黄土高原土壤水分生态因素分析的基础上，探讨了黄土高原土壤水分的季节性变化、土壤剖面水分变化、区域水分变异规律，分析了土壤水分与植被生产力间的相互关系，并提出了改善黄土高原土壤水分生态环境、提高植被生产力的调控技术。

Relationship between the Soil Moisture and the Vegetation Productivity in the Loess Plateau

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.