黄土高原半干旱区植被建设的土壤水分效应及其影响因素

Review and discuss on the effect and influence factors of vegetation construction on soil water in semi-arid area on Loess Plateau

水分是黄土高原半干旱地区植物生长与植被建设的主要限制因子,植被是影响土壤水分最活跃、最积极的因素。为了给黄土高原半干旱区植被的合理经营和今后植被的科学营造及开展植被建设的水文生态效应研究提供参考,从不同植被类型、生长状况与结构,不同植物的耗水特点及影响因素等方面,概述半干旱地区不同植被对土壤水分影响的研究进展。认为:为保证植被建设的可持续,需适度发展植被生产力,合理选择植物类型。在深入研究不同植物需耗水规律的基础上,加强植被生产力与水分利用的结合研究和从景观配置水平研究植被建设对土壤水分环境的影响。

Water is the primary limiting factor for plant growth and vegetation construction in semi-arid area on the Loess Plateau, and the vegetation is the most active factor that influences the soil moisture condition. The effects of vegetation types, structure and productivities on soil moisture were studied, the water consumption characteristics and affecting factors of different plants were summarized and discussed. It is proposed that for successful and sustainable vegetation constructions, the productivity of vegetation should be developed moderately and the plant or vegetation type should be chosen rationally according to the regional rainfall and soil moisture capacity. Based on the deeply research on the water requirement and consumption laws of different plants, plant productivity and its water consumption, namely water use efficiency should be strengthened, and the study on the effects of vegetation construction pattern on soil moisture should be developed.