三江源区“黑土滩”次生植被形成的三阶段物种生态位与毒杂草繁殖特征

The Three-stage Species Niche and Reproductive Characteristics of Poisonous Weeds in the three-stages of the Secondary Vegetation's Formation of ‘bare land’ degraded grassland in the Three Rivers Source region, Qinghai-Tibetan plateau

XU Song-he, SHANG Zhang-huan

Acta Agrestia Sinica . 2019, (4): 949 -955 . DOI: 10.11733/j.issn.1007-0435.2019.04.020