内蒙古奈曼地区沙地植物多样性及其季节变化研究

Plant Diversity of Desert Vegetation in Naiman Region,Inner Mongolia

本文对内蒙古奈曼旗3种不同类型植被进行了植物多样性调查.结果表明:半固定沙地、退耕地和退牧地的植物多样性随季节发生变化,植物多样性夏季最高.半固定沙地植物多样性随季节变化由大到小依次为:夏季>秋季>春季;退牧地和退耕地植物多样性变化为:夏季>春季>秋季.本区植被的生活型以一年生草本植物为主,其次为地面芽和地上芽植物,高位芽和地下芽植物较少.

The plant diversities of three kinds of desert vegetation were investigated in the field.The results showed plant diversity of desert vegetation changed with the growth season and the index of plant diversity in summer was highest.The plant diversity in semi-fixed desert vegetation changed from high to low in the order of summer,automum and spring.And plant diversities in forbidden grassland and forbidden farmland changed in the order of summer,spring and automum.The dominant type in life-form spectrum of desert vegetation in Naiman region was annual plant,and the second was hemicryptophyte and chamaephyte,the less types were phaenerophyte and geophyte.