豫南茶园VA菌根真菌种类研究

Species of VAM Fungi Around Tea Roots in the Southern Area of Henan Province

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(Acaulospora laevis)、聚丛球囊霉(Glomus aggregatum)、幼套球囊霉(Glomus etunicatum)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。

The morphology,species frequency,spore density and natural infection rate of the VAM fungi in tea gardens were studied in the southern parts of Henan province.As a result,the VAM fungi were divided into three parts,outer,inner and the surface fungus configuration.Twelve species in four genus of VAM fungi were reported in this study.Among them,Acaulospora laevis,Glomus aggregatum,Glomus etunicatum were considered as the dominancy species.The results also showed that the VAM fungi infection rate to the tea roots was higher in these areas than others,but the difference at the VAM fungi spore density in soils in different tea gardens was very great.