气候条件对典型草原牧草生长发育影响浅析

Effects of Climatic Conditions on the Growth and Development of Typical Prairie Grass

采用兴安盟扎赉特旗2004年～2011年气候生态环境监测站监测的典型草原牧草生长发育及地上生物量等基本资料。典型草原主要牧草种类有贝加尔针茅、野古草、羊草等禾草,伴生中旱生杂草、灌木及半灌木组成,草丛一般高30～50 cm。本文详细分析了当地气候条件对典型草原牧草生长发育及产量的影响。结果表明,典型草原牧草的高度、盖度及地上生物量受温度和降水量影响最明显,其中降水量的影响超过温度的影响。降水量多的年份地上生物量明显增加,而干旱年份地上生物量减少,其最大值一般出现在7月份,并滞后于降水量最大值。

The basic data of typical pasture grass growth and above-ground biomass collected by the climatic and ecological environment monitoring station of Jalaid banner in Hinggan League during 2004-2011 were adopted in this paper.The main forage species are typical grassland Stipa baicalensis,ancient wild grass,Leymus and other grasses,associated in the dry weeds,shrubs and semi-shrubs,Hige grass is generally 30 to 50 cm.This detailed analysis of the local climatic conditions typical of prairie grass on the growth and yield.The results show that,A typical prairie grass height,cover and aboveground biomass by the most obvious effect of temperature and precipitation,significantly increased aboveground biomass,and aboveground biomass dry years reduced its maximum generally occurs in July,and lags behind the precipitation maxmum.