关键词: 荒漠植物, 根系构型, 拓扑指数, 分形维数, 分支率, 连接长度

Abstract: The time budget and social behavior of David's Deer in post-rutting season were reported and contrasted with those in rutting season. In post-rutting season, the master and adult females spent more time on resting and less time on feeding than bachelor; the feeding behavior of both master and bachelor was defferent in time and space but may coincide with that of adult females; David's Deer herd spent more time on resting, feeding, and drinking and less time on standing and moving than those in rutting season; the herd is prefered hard soil and feeding zone in terms of habitat selection; the affiliative behavior existed among the master and adult females. Artificial selection decreased the frequency of fighting behavior and increased that of homing and territory behavior, which was closedly related to sexual behavior.

Key words: desert plant, root architecture, topological index,  fractal dimension, branching ratio, link length.