铁卜加地区主要植物种群密度及其与气象条件关系的研究

A STUDY ON THE DENSITICS OF PLANTS COMMUNITY AND THE RETAIONWITH ITS METEOROLOGICAL CONDITION IN TICBUJIA REGION

利用铁卜加地区自1987年以来的主要植物种群密度和有关的气象因素资料，研究了植物密度变化及其与气象因素之间的关系。结果表明：五种主要牧草种群密度的排序是猪毛蒿（300株／m2）＞干生苔草（200～300株／m2）＞天山赖草（100～200株／m2）＞冷地早熟禾（50～100株／m2）＞紫花针茅（10～20株／m2）；其中天山赖草种群密度变异系数最小（50％左右），紫花针茅变异系数最大（75％～200％）。该地区降水与温度年际变化基本趋向一致。分析得出天山赖草、冷地早熟禾、干生苔草具有较强的气候适应性，紫花针茅、猪毛蒿、具有较差的气候适应性。

Base on the density of sevcral plant community and relatinal meteorological factors from 1987 in Tiebujia,region the densities of plants community and the relation with its me teorological condition were studied,The results showed that the sort order of the five plant densities wereArtemisia scoparia,ria (300 plants /m2) >Carex condilapis (200~ 300 plants/ m2 ) >Leymus tianischanicus (100~ 200plants/m2) >Poa crymophila . (50~ 100 plants/m2 ) > Stipa purpurea (10~20 plantsIm2),and the minimal one among them wasLeymus tianschan icus with above 50%, the maximal onc was Stipa purpurea with 75%~ 200%. TheLeymus tianschanicus, Poa crymophila and Carex condilapis were strong adapt - ability for climate andStipa purpurea,Artemisia scoparia were lowcr adap-ability for climate,This region, the changes by year for precipitation and temperature about trended same way.