木麻黄Frankia菌优良菌株的筛选和应用

本文报导了从木麻黄根瘤菌中筛选优良菌株并进行回接试验的结果。筛选出Ｕ４和Ｃｃ３８Ａ优良菌株，接种后使苗木早期生物量提高９０．７％～２７５．６％，苗高增长２０．０％～３１．６％。造林７年后，粗枝木麻黄树高比对照增加１２．４５％～１５．１４％，胸径增大１０．２８％～２２．１３％；细枝木麻黄胸径增大６．３４％～９．４４％，树高增加６．０５％或生长与对照差不多。结瘤侵染力主要由菌株特性决定，但与菌体培养时间、接种菌体量和浸泡时间密切相关。

Screening and Application of Superior Frankia Strains of Casuarina Species

Two superior Frankia strains of Casuarina species were screened and inoculated back to the seedlings which were transplanted afterwards.During the early stage the seedling biomass increased by 90 7～275 6% and the seedling height increased by 20.0～31 6% Seven years later,as compared with the control trees ,the height and dbh of C.glauca increased by 12 45～15 14% and 10 28～22 13%,respectively and the dbh and height of C.cunninghamiana increased by 6 34～9 44% and 6 05%,respectively.The nodulation infecting potential was mainly determined by the strain characteristics,but it was closely correlated with the mycelium cultural time,inoculative mycelium quantity and seedling soaked time.