丝状真菌对不同底物的分解及种群数量的变化  

Decomposition of Mycelial Fungi for the Different Substrates and Its Change of Population Quantity

作　　者：宋福强[1] 田兴军[1] 李重奇[1] 杨昌林[1] 郝杰杰[1] 

机构地区：[1]南京大学,南京210093

出　　处：《东北林业大学学报》2004年第4期41-43,共3页Journal of Northeast Forestry University

基　　金：教育部博士点基金 (2 0 0 30 2 840 4 4 );教育部归国留学基金资助

摘　　要：通过把芽枝霉 (Cladosporiumberbarum)、木霉 (Trichodermasp2 )、黄曲霉 (Aspergillusfumigatus)、链格孢(Alternariasp)、青霉 (Penicilliumsp2 )、曲卷毛壳菌 (Chaetomiumbostrychodes) 6个菌株混合后 ,接种在 3种底物枫香(Lf)、马尾松 (Pm)和两者组合 (mLf+mPm)上 ,研究了真菌对底物的分解速率和真菌在底物上数量的变化。结果表明 :混合真菌对底物的分解速率快于单独菌株对底物的分解 ,混合底物快于相应的单一底物的分解 ,并且底物分解过程符合Olson指数降解模型 ,根据分解系数推导出混合真菌对底物的分解速率依次为mLf>Lf>mPm >Pm。 6种真菌中Cladosporiumberbarum、Chaetomiumbostrychodes在分解前期对底物的分解起作用 ,Trichodermasp2、Aspergillusfu migatus、Alternariasp、Penicillium在不同的底物上始终能以一定的种群数量存活下来 ,对底物的分解一直起着至关重要的作用。真菌的总体数量与质量损失率呈正相关。底物的多样性有利于真菌的定殖、繁殖 ,同时也有利于加速底物的分解。The decomposing rates of fungi for substrates and the quantity change of fungi on substrates were studied by inoculating the mixture of Cladosporium berbarum, Trichoderma sp2, Aspergillus fumigatus, Alternaria sp, Penicillium sp2,Chaetomium bostrychodes to the three kinds of substrates of Pinus massoniana (Pm), Liguidambarformasana (Lf), and the combination of Pm and Lf. The results showed that the decomposing rate of mixed fungi for substrates was faster than that of single fungus, and the decomposition of the mixed substrate was faster than that of single substrate, moreover, the decomposing processes of substrates were suitable for the model of Olson Index Decomposition. According to the decomposing coefficient, the decomposing rates of mixed fungi for substrates followed the order of mLf > Lf > mPm > Pm. Of six fungi, Cladosporium berbarum and Chaetomium bostrychodes in the prophase of decomposition had a decomposing action for the substrates, and Trichoderma sp2, Aspergillusfumigatus, Alternaria sp, and Penicillium on different substrates could always survive with a certain population quantity, and played a key role in decomposing substrates. The total quantity and gravity - free rate of fungi showed a positive correlation. The diversity of substrates is beneficial to the establishment, reproduction, and the accelerating decomposition of substrates.

关 键 词：真菌 落叶 分解速率 

分 类 号：S763.5[农业科学—森林保护学]