关键词: 东北地区, 生态资本效率, Tobit回归, 超效率DEA模型

Abstract: To understand the characteristics of fungal communities of bamboo infected with witches’ broom disease and explore the correlation between witches’ broom pathogen and other bambusicolous fungi, species composition and diversity in fungal communities associated with witches’ broom diseased twigs of three bamboo species (Phyllostachys bambusoides f.lacrimadeae, Ph. edulis and Ph. praecox) were analyzed using highthroughput sequencing technology, DNA barcode technology, and bioinformatics technology. The results showed that: (1) A total of 706 OTUs were obtained, with 48 OTUs being shared by all samples. Aciculosporium, Shiraia, Myrothecium, Pyrenochaeta, Colletotrichum, Fusarium, CamptophoraandPseudozyma were the dominant genera of bambusicolous fungal communities. (2) Chao1 index and Shannon index were not significantly different among fungal communities (P>0.05). (3) The causal agent of witches’ broom disease of the three bamboo species was Aciculosporium take, which was negatively correlated with other 13 species of bambusicolous fungi, and nine of them were significantly correlated (P<0.05). This pathogen showed a weak positive correlation with other two species of bambusicolous fungi. (4) Trichoderma virens, Cladosporiumsp.,Shiraiasp.,Curvulariasp., Penicilliumsp. and Acremoniumsp. were important components of the fungal communities, which were the potential biocontrol agents of bamboo diseases.

Key words: ecological capital efficiency, super-efficiency DEA model, Tobit regression, Northeast China