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茶树根际土壤细菌多样性及其主要环境影响因子研究 被引量:5
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作者 贺屹成 王梦姣 秦公伟 《茶叶通讯》 2021年第1期40-49,共10页
采用高通量扩增子测序法对秦巴山区镇巴、宁强和城固三地典型茶园茶树根际细菌多样性和茶树根际微环境进行分析。茶树根际细菌多样性研究结果表明,采样地样品中所有土壤茶树根际细菌分布在41个门(其中13个门相对丰度大于1%)、1288个属(... 采用高通量扩增子测序法对秦巴山区镇巴、宁强和城固三地典型茶园茶树根际细菌多样性和茶树根际微环境进行分析。茶树根际细菌多样性研究结果表明,采样地样品中所有土壤茶树根际细菌分布在41个门(其中13个门相对丰度大于1%)、1288个属(其中33个属相对丰度大于1%)。镇巴采样地2年生茶树根际细菌数量最少,多样性最差。茶树根际微环境研究结果表明,所有采样地土壤的营养成分均能满足茶树生长需求,但城固采样地需要进行少量有机碳的补充;三个采样地土壤pH值在4.5~5.5,含水量呈现出不同变化趋势。茶树根际细菌多样性和根际微环境相关性分析结果表明,影响茶树根际细菌多样性的主要环境因子分别为土壤有机碳、有机氮及水解性氮含量。 展开更多
关键词 茶树 秦巴山区 微生物 根际土壤元素含量 相关性
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Study on Model of Correlation Between Chemical Ele-ment Contents in Tree Rings and Soils near Tree Roots 被引量:3
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作者 KESHAN-ZHE QIANJUN-LONG 《Pedosphere》 SCIE CAS CSCD 1994年第1期19-26,共8页
The chemical element contents in tree rings are correlated with those in the soils near the tree roots. Theresults in the present study showed that the correlation between them could be described using the followinglo... The chemical element contents in tree rings are correlated with those in the soils near the tree roots. Theresults in the present study showed that the correlation between them could be described using the followinglogarithmic linear correlation model:lgC'(Z) = α(Z) + b(Z)lgC(Z).Therefore, by determining the chrono-sequence C(Z, t), where Z is the atomic number and t the year ofelemental contents in the annual growth rings of trees, we could get the chrono-sequence C'(Z, t) of elementalcontents in the soil, thus inferring the dynamic variations of relevant elemental contents in the soil. 展开更多
关键词 correlation model elemental contents SOILS tree rings
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