关键词: 植物阻沙能力, 柔韧性, 粗糙元密集度, 配置模式

Abstract: Above-ground parts of the plant are key components that alter the wind flow and affect the movement of blown sand. The volume of dune body and sediment transport rate may be used to measure the capacity of plant for trapping blown sand, which is influenced by some factors such as plant morphology and structure, roughness concentration, community collocation and so on. Under the same circumstance, different plants may have different capacities for trapping blown sand due to differential crown morphology, flexibility of branch and leaf area. In different phonological phases of the same plant, the factors like crown morphology, flexibility of branch, leaf area and the resulting distribution pattern of aboveground biomass change significantly. There are several future research directions of capacity of plant for trapping blown sand. (1) How to determine and divide the flexibility levels of plant branch, and to develop evaluation indexes and system of capacity of plant for trapping blown sand; (2) how to make certain the critical roughness concentration of plant community for trapping blown sand; (3) how to enhance the diversity of configuration models when community roughness concentration reaches critical roughness concentration, and find the effectiveness and coordination among roughness concentration, community collocation (when distance between rows and hills changes) and utility maximization to contribute to the current practice of ecological construction.

Key words: capacity of plant for trapping blown sand, flexibility, roughness concentration, community collocation