Pt菌根菌剂对巨尾桉生长的持续效应

SUSTAINED EFFECTS OF MYCORRHIZAL FUNGUS PISOLITHUS TINCTORIUS ON THE GROWTH OF EUCALYPTUS GRANDIS×E. UROPHYLLA

摘要:

探讨了Rsolithustinctorius菌剂对巨尾桉（Eucaloptusgrandis×E．urophylla）林木生长的持续影响。结果表明：Pt菌剂对树高生长的持续影响显著，对立木单株材积的持续影响极显著，而对直径生长的影响在造林前期极显著，后期不显著；菌根林造林成活率比对照林提高15.76％，保存率两者相差无几；菌根林的蓄积量持续高于对照林；菌根的投入产出比为1：10.67，经济效益显著。

Abstract:

Five grains pure mycorrhizal inoculum of Pisolithus tinctorius (Pt) was injected toeach seeding of Eucalyptus grandis × E. urophylla before transplanting for one month inexperiment plots of Gaofeng Forest Farm near Nanning City, Guangxi. The sustainedeffect of Pt on the increments of plant growth height and tree volume were remarkable,being by 16.34% at the tree age of 3 months and 18.5% at tree age of 16 months,respectively, as compared to the control. The survival rate of seedings after transplanting for 3 months was increased by l5.76％ compared to the control，and the total increments of the tree volume were obvious eigther in young trees or in trees of harvest cutting．The economic profit from the forest would be ten times the cost of mycorrhizal investment.