木麻黄根瘤内生菌纯培养接种效果试验

Experiment on Effect of Inoculation with Pure Culture of Frankia from Nodules of Casuarina

用Ｆｒａｎｋｉａ纯培养接种木麻黄苗木试验，获得了明显效果，苗高、地径、根瘤数、根瘤鲜重及生物量均比对照高。在４个供试菌株中，接种Ｂｒ的效果最好，苗高、地径分别为对照的３．５倍和２．７倍，其次是Ｐ１。接种效果随着苗龄增加越来越明显。苗木的高度、地径、生物量与根瘤数量、根瘤重呈极显著的直线正相关。

The result showed that effect of inoculation on casuarina seedling with pure culture of Frankia is obvious. Inoculated seedling`s height,basic diameter,number and fresh weight of nodule and biomass were higher than those of the uninoculated seedlings,A- mong four tested Frankia strains,Br behaves best.Height of seedling inoculated with Br were 3.45 times that of the control, and 2.73 times in basic diameter. Strain P1 was the bet- ter one. Effect of inoculation became more significant as time went on. Seedling`s height,basic diameter and biomass appeared to be extremely positively correlative with the number and fresh weight of its own nodule.