<正>对豫南茶园VA菌根真菌形态、种类、种群频度、孢子密度及自然侵染率进行观察与测定。结果表明,茶树VA菌根菌的结构可分为根外、根表和根内3部分。豫南茶园VA菌根真菌有4属12种。其中，光壁无梗囊霉（Acaulosporalaevis）、聚丛球囊霉（Glomusaggregatum）、幼套球囊霉（Glomusetunicatum）是该区茶园vA菌根菌优势种。豫南各茶园VA菌根真菌的自然侵染率普遍较高，孢子密度差异较大，孢子密度及自然侵染率一般随土层的加深而降低。

Based on the results of national forestry ecological construction zoning, this paper divided region of forestry eco-environmental construction into upper and middle Yellow River region,upper Yangtse Rive region, three Norths region, Northeast region, North region, South region, Southeast coast and Tropical region and Tibetan plateau region. And then, analysised and studied thoroughly the features of natural eco-environments and geographic position of the 8 regions. The ecological problems and the beneficial and unbeneficial factors to forestry conservation and construction were investigated in all of regions. Meanwhile, some suggestions were given to improve forestry eeo-envir0nment.