河西走廊荒漠区一年生植物组成及其分布特征

Composition and distribution characteristics of annual plant in desert area in Hexi Corridor

一年生植物是一类物种多样性比较丰富的独特植物类群,是河西走廊荒漠植物区中重要的组成部分。经初步调查河西走廊荒漠区共有一年生植物142种,隶属于25科81属。由于地处严酷的干旱荒漠环境,这些一年生植物大体集中于藜科、十字花科和禾本科等有限的少数科。在分布特征上具有明显的地域性分布特征、季节性分布特征、不同基质上的分布特征和不同地质地貌上的分布特征。研究一年生植物的组成及其分布特征对研究河西走廊荒漠区植物种群结构特征具有重要的科研价值。

Annual plant is an important and special eremophyte component with rich species diversity in Hexi Corridor. Based on the survey, there are 142 annual plant species belonging to 81 genera and 25 families in Hexi Corridor. Because of the harsh arid desert environment, the annual plant concentrates in a few families, such as Chenopodiaceae, Cruciferae and Gramineae etc. The distribution features obvious geographical, seasonal characters, and the distribution characters varies in different ground substances and different geological features.