本文選題：磷脂脂肪酸 + 寒溫帶��； 參考：《東北林業(yè)大學(xué)學(xué)報》2017年09期

【摘要】：為了研究不同林型興安落葉松林土壤微生物生物量和群落結(jié)構(gòu)特征,探討土壤微生物生物量、群落結(jié)構(gòu)的分布規(guī)律以及影響因子,選擇了4個典型興安落葉松林,即蘚類興安落葉松林、杜香興安落葉松林、草類興安落葉松林和杜鵑興安落葉松林,采用磷脂脂肪酸生物標(biāo)記法分析4個林型的土壤微生物量和群落組成。結(jié)果表明:4個林型中共檢測出10種類型51種不完全分布的磷脂脂肪酸(PLFAs)生物標(biāo)記,微生物量由多到少的排序為細(xì)菌、真菌、放線菌。4個林型中微生物總生物量、細(xì)菌生物量是蘚類興安落葉松林最高,草類興安落葉松林最低;真菌生物量為杜香興安落葉松林最高,草類興安落葉松林最低;放線菌生物量為杜鵑興安落葉松林最高,草類興安落葉松林最低。冗余分析顯示,土壤含水率對細(xì)菌影響最大,全鉀、速效鉀質(zhì)量分?jǐn)?shù)對真菌影響最大,土壤有機碳和堿解氮質(zhì)量分?jǐn)?shù)對放線菌影響最大。從而表明,寒溫帶興安落葉松林不同林型的土壤微生物生物量和群落存在差異,土壤微生物群落與土壤性質(zhì)之間具有相關(guān)性。
[Abstract]:In order to study the characteristics of soil microbial biomass and community structure in different forest types of Larix gmelini, and to discuss the distribution of soil microbial biomass, community structure and influencing factors, four typical Larix gmelinii forests were selected. The soil microbial biomass and community composition of four forest types were analyzed by means of phospholipid fatty acid biomarker method, I. e., Larix gmelini forest, Larix gmelinii forest, grass larch forest and rhododendron Larix gmelini forest. The results showed that 10 types and 51 incomplete distribution of phospholipid fatty acids (PLFAs) biomarkers were detected in 4 forest types. The order of microbial biomass was bacteria, fungi and actinomycetes. The biomass of bacteria was the highest in the mossy larch forest, the lowest in the grass larch forest, the highest in the Larix gmelinii forest and the lowest in the grass larch forest, while the actinomycetes biomass was the highest in the Rhododendron gmelini larch forest. Grass Larix gmelinii forest is the lowest. Redundancy analysis showed that soil moisture content had the greatest effect on bacteria, total potassium and available potassium had the greatest effect on fungi, and soil organic carbon and alkali-hydrolyzed nitrogen content had the greatest influence on actinomycetes. The results showed that there were differences in soil microbial biomass and community among different forest types of Larix gmelini forest in the cold temperate zone, and there was a correlation between soil microbial community and soil properties.
【作者單位】： 東北林業(yè)大學(xué);黑龍江省科學(xué)院自然與生態(tài)研究所;
【基金】：國家自然科學(xué)基金項目(31600396/31570486) 國家重點研發(fā)計劃重點專項(2016YFC0500405)
【分類號】：S714.3

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