高寒地区不同海拔梯度西北小檗生境土壤微生物群落结构及多样性分析
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青海省重大科技专项(2018NKA3);


Analysis of Soil Microbial Community Structure and Diversity in Berberis vernae Habitat at Different Altitudes in Alpine Region
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    摘要:

    以青海高原2 300~4 000 m海拔范围的6处西北小檗(Berberis vernae)生境土壤为试材,采用高通量测序方法,分析不同海拔梯度西北小檗生境土壤微生物群落结构及多样性。研究结果表明:(1)在西北小檗生境土壤中,细菌群落组成主要包括10个细菌门21个细菌属,真菌群落由子囊菌门、担子菌门等8个真菌门59个真菌属组成。(2)低海拔位置的海东乐都1号样点(hdld1) 0~20 cm土层的细菌群落丰富性及多样性均最高,黄南泽库样点(hnzk) 0~20 cm土层的真菌群落丰富度最高,西宁大通样点(xndt) 0~20 cm土层的真菌群落多样性最高;随着海拔的升高,0~20 cm、40~60 cm土层的细菌群落丰富度及多样性呈现出先降低再升高再降低的趋势,20~40 cm土层的细菌群落丰富度及多样性则呈现出先升高后降低的趋势,0~20 cm、20~40 cm土层土壤微生物真菌群落丰富度呈现出先升高再降低再升高的趋势,0~20 cm、40~60 cm土层真菌群落多样性呈现先升高再降低的趋势,40~60 cm土层的真菌丰富度及20~40 cm土层的真菌多样性的变化趋势不明显。(3)硝态氮、速效磷和速效钾对土壤微生物群落的影响较明显。综上可知,高寒地区不同海拔梯度西北小檗生境土壤微生物群落结构多样性呈现出一定的海拔差异趋势,其海拔差异主要受到环境条件、土壤理化性质和植被分布的影响。

    Abstract:

    Based on soil samples at six habitats of Berberis vernae in different altitudes range from 2 300 m to 4 000 m in eastern of QinghaiTibet Plateau, we analyzed soil microbial community structure and diversity by highthroughput sequencing method. The results showed that: (1) in the soil of B. vernae habitats, the bacterial community mainly included 21 bacterial genera of 10 bacterial phylum, and the fungal community was made of 59 fungal genera of 8 fungal phylum such as Ascomycota and Basidiomycota. (2) The richness and diversity of bacterial community in 0-20 cm soil layer of Haidong Ledu No.1 site (hdld1) at low altitude was the highest, the richness of fungal community in 0-20 cm soil layer of Huangnan Zeku site (hnzk) was the highest, and the diversity of fungal community in 0-20 cm soil layer of Xining Datong site (xndt) was the highest. With the increase of altitude, the richness and diversity of bacterial community in 0-20 cm and 40-60 cm soil layers decreased firstly, then increased and then decreased, the richness and diversity of bacterial community in 20-40 cm soil layer showed a trend of increased firstly and then decreased, while the richness of microbial fungi community in 0-20 cm and 20-40 cm soil layers increased first, then decreased and then increased. The diversity of fungal community in 0-20 cm and 40-60 cm soil layers increased firstly and then decreased with the elevation, but the change trend of fungal richness in 40-60 cm soil layer and fungal diversity in 20-40 cm soil layer was not obvious. (3) Nitrate nitrogen (N), available phosphorus (OP) and available potassium (AK) had obvious effects on soil microbial community. Above all, the diversity of soil microbial community in B. vernae habitats at different altitude gradients in alpine regions showed a different trend as altitude change, which was mainly affected by environmental conditions, soil physical and chemical properties and vegetation distribution.

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向前胜,张登山,孙 奎,等.高寒地区不同海拔梯度西北小檗生境土壤微生物群落结构及多样性分析[J].西北植物学报,2021,41(6):1036-1050

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  • 在线发布日期: 2021-07-20
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