蓝桉和尾叶桉混合菌根研究 Ⅱ.混合菌根的接种效应  

Studies on Dual Mycorrhizas of Eucalyptus globulus and E.urophylla Ⅱ.Inoculant Efficacy on the Growth

作　　者：陈应龙[1] 弓明钦[1] M.Brundrett B.Dell 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]CSIROForestry&ForestProducts [3]MurdochUniversity

出　　处：《林业科学研究》1999年第6期591-598,共8页Forest Research

基　　金：中澳合作ACIAR项目!(9425)

摘　　要：接种苗木在生长量和生物量上均表现出极其显著的生长优势，ＥＣＭ 真菌蜡蘑菌单接种及其与４种ＶＡ菌根菌剂混合接种，对苗木生长的促进作用尤为显著。在接种后１６周时，与对照苗相比，蓝桉和尾叶桉接种苗木的高生长量最大增幅分别为２８．８６％ （ＬＳ）和８６．６５％ （ＬＧ）；两种桉树地上部分平均干质量最大增幅分别为１２９．９３％ （ＬＳ）和１３３．３４％ （Ｌ），地下部分分别为１１９．９３％ （ＬＦ）和１７４．８３％ （ＬＧ）。桉树对不同菌根菌及其组合的菌根依赖性表现出很大的差异，对混合接种的真菌组合有相对高的菌根依赖性，而对土壤菌剂依赖性很小。菌根感染与苗木生物量间有显著的相关性。试验结果还证实了Ｐ素对桉苗生长的促进作用，Ｐ素水平对菌根的接种效应有一定的影响。The second part of the results based on a glasshouse experiment.The inoculant effectiveness of 4 VA mycorrhizal fungi and 1 ectomycorrhizal fungus alone or in combination on the growth of Eucalyptus globulus and E.urophylla saplings was reported.There were substantial differences on the growth among treatments ( P <0.005).Large responses of height growth and biomass stimulated by fungal inoculation were observed for both plants during 16 week growing in a sterilized Karrakatta yellow sand.Average heights of inoculated E.globulus and E.urophylla seedlings were respectively increased by up to 28.86% ( Lacc aria +Scutellospora, LS) and 86.65% ( Laccaria+Glomus, LG),compared to those of uninoculated ones at 16 weeks after inoculation.Dry weights of sapling were up to 129.93% (tops) and 119.93% (roots) for E.globulus, 133.34% (tops) and 174.83% (roots) for E.urophylla respectively relative to controls.The growths of both plants were more significantly enhanced by dual inoculation with Laccaria and one of 4 VA mycorrhizal fungi than those inoculated individually.There were strong interactions between fungal colonization and plant growth,which reflected the inoculation efficacy.Ectomycorrhizal fungi had a major impact on root system form substantially reducing the proportion of fine roots (specific root length),but this did not occur when only VAM fungi were present.The results also revealed that phosphorus level in soils greatly affected the growth of plants and interacted fungal efficacy as well.

关 键 词：混合接种 外生菌根 VA菌根 桉树 接种效应 

分 类 号：S718.81[农业科学—林学]