关键词: 伊犁绢蒿, 构件, 生物量, 动态监测

Abstract: Excessive grazing and irrational grazing system had resulted in the severe degradation of sagebrush desert in Xinjiang and restricted the development of seasonal stock raising in Xinjiang. In order to understand the growth law of individual module of dominant species and guide the reasonable utilization and reversion of sagebrush desert grassland in Xinjiang, the amount and yield dynamics of individual modules of Seriphidium transiliense in sagebrush desert grassland was investigated in field and laboratory in 2005 and 2006. Results show: height and tiller weight of S.transiliense were linearly increased during entire growing season, and emerged in a ‘rapid-slow-rapid’ shape on rate of growth; the tiller quantity and leaf biomass had "increase-reduce-increase" and "double growth peaks" in curve shapes, respectively; the root biomass had no significant difference and averaged 6.1 g per individual plant; both the whole yield and aboveground biomass of S. transiliense emerged in S shape; the fluctuations of modules between 2005 and 2006 was probable related to the local conditions of moisture and temperature. Desert grassland of S. transiliense was suitable for grazing from April to June in spring and from September to October in fall during the whole growing season.

Key words: Seriphidium transiliense, Modules, Biomass, Dynamical measuring