纳帕海沼泽化草甸不同季节土壤真菌群落结构与理化性质的关系

doi:10.11924/j.issn.1000-6850.casb17080110

中国农学通报 ›› 2018, Vol. 34 ›› Issue (29): 69-75.doi: 10.11924/j.issn.1000-6850.casb17080110

• 资源环境生态土壤气象 • 上一篇下一篇

纳帕海沼泽化草甸不同季节土壤真菌群落结构与理化性质的关系

任玉连,范方喜,彭淑娴,陆梅

西南林业大学,西南林业大学,西南林业大学,西南林业大学环境科学与工程学院

收稿日期:2017-08-25 修回日期:2018-09-18 接受日期:2017-10-25 出版日期:2018-10-15 发布日期:2018-10-15
通讯作者: 陆梅
基金资助:
云南省应用基础研究面上项目“高原湿地纳帕海不同水位梯度土壤微生物特性研究”(2013FB053)；国家自然科学基金面上项目“滇西北典型高原湿地退化规律与机理研究”(40971285)。

Relationship Between Soil Fungal Community Structure and Physical and Chemical Properties of Different Seasons Swamp Meadow in Napahai Wetland

Received:2017-08-25 Revised:2018-09-18 Accepted:2017-10-25 Online:2018-10-15 Published:2018-10-15

摘要/Abstract

摘要： 为阐明纳帕海湿地沼泽化草甸土壤真菌群落结构的季节变化规律及其与理化性质的关系，采用稀释培养结合形态鉴定比较，分析旱季和雨季土壤真菌群落结构的季节变化，并探讨其与土壤理化性质的相互关系。结果表明：（1）土壤有机质、全氮、速效氮、速效钾和速效磷在0~20 cm土层为雨季>旱季；20~40 cm土层除全氮外，为旱季>雨季。土壤容重和自然含水率在0~20 cm土层和20~40 cm土层为雨季>旱季。（2）旱季和雨季土壤真菌多样性均具有明显季节变化，0~20 cm土层除均匀度指数JSW外，真菌数量、多样性指数H''和丰富度指数DMA为旱季>雨季。20~40 cm土层，多样性指数H''和丰富度指数DMA为旱季>雨季，真菌数量和均匀度指数JSW为雨季>旱季。（3）经形态鉴定，旱季和雨季分别分离到12 属和11 属真菌，群落结构组成相似性极高，但也表现出一定差异性。曲霉属和腐霉属同为旱季和雨季沼泽化草甸的优势类群；枝孢菌属和壳囊孢属是旱季特有属，链孢菌属是雨季特有属。（4）经Pearson 相关性分析：在旱季和雨季，土壤有机质、全氮、速效氮、速效钾、速效磷、容重和自然含水率与土壤真菌群落结构组成相关性大。不同季节土壤真菌多样性和群落组成有明显的季节变化特征，土壤理化性质与真菌群落结构组成密切相关，为研究真菌群落对纳帕海湿地生态系统的影响提供参考依据。

Abstract: To clarify the seasonal variation rule of soil fungal community structure and its relationship with physical and chemical properties in the swamp meadow of Napahai wetland, we took the method of diluted culture combined with morphological identification comparative analysis, to study the seasonal variation of soil fungal community structure in dry season and rainy season, and explored its relationship with physical andchemical properties. The results showed that (1) soil organic matter, total nitrogen, available nitrogen, available potassium and available phosphorus in 0-20 cm soil layer in rainy season were higher than those in dry season, but those in 20-40 cm soil layer in dry season were higher than those in rainy season, except total nitrogen; the soil bulk density and natural water content in 0-20 cm and 20-40 cm soil layer in rainy season were higher than that in dry season; (2) soil fungal diversity had significant seasonal variation, except Pielou index (JSW ), fungi number, diversity index (H '') and Margalef index (DMA ) in dry season were higher than those in rainy season of 0-20 cm soil layer, diversity index (H'' ) and Margalef index(DMA ) in dry season were higher than those in rainy season in 20-40 cm soil layer and fungi number and Pielou index (JSW ) in rainy season were higher than those in dry season; (3) morphological identification showed that: 12 genera and 11 genera of fungi were isolated in the dry season and rainy season respectively, and the community structure was similar in composition, but also had some differences,Aspergillus andPythium belonged to the dominant species in the dry season and the rainy season, Cladosporium and Cytospora Ehrenb were the genera of dry season, and Neurosporacrasa was endemic to rainy season; (4) Pearson correlation analysis showed that: soil organic matter, total nitrogen, available nitrogen, available potassium, available phosphorus, bulk density and natural water content were closely related to soil fungal community structure in dry season and rainy season. There were obvious seasonal variation characteristics of soil fungal diversity and community composition in different seasons, soil physical and chemical properties and fungal community structure were closely related, and the results provided references for studying the influence of fungal community on Napahai wetland ecosystem.

中图分类号:

X172
S153

任玉连,范方喜,彭淑娴,陆梅. 纳帕海沼泽化草甸不同季节土壤真菌群落结构与理化性质的关系[J]. 中国农学通报, 2018, 34(29): 69-75.

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纳帕海沼泽化草甸不同季节土壤真菌群落结构与理化性质的关系

Relationship Between Soil Fungal Community Structure and Physical and Chemical Properties of Different Seasons Swamp Meadow in Napahai Wetland

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