The interactive effects of soil transplant into colder regions and cropping on soil microbiology and biogeochemistry.
The interactive effects of soil transplant into colder regions and cropping on soil microbiology and biogeochemistry.
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DOI：
10.1111/1462-2920.12398
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发表时间：
2015-03
影响因子：
5.1
通讯作者：
Shanshan Liu;Feng Wang;K. Xue;Bo Sun;Yuguang Zhang;Zhili He;J. V. Van Nostrand;Jizhong Zhou
中科院分区：
文献类型：
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作者：
Shanshan Liu;Feng Wang;K. Xue;Bo Sun;Yuguang Zhang;Zhili He;J. V. Van Nostrand;Jizhong Zhou
土壤移植到温暖地区已被证明会改变土壤微生物学。相比之下，人们对土壤移植到寒冷地区的影响知之甚少，尽管近年来气候变冷引起了人们的关注。为了解决这个问题，我们移植裸休闲土壤在大断面从中国南部（亚热带气候区）到中部（暖温带气候区）和北方中国（冷温带气候区）。经过4年的适应期，土壤氮素组分、微生物生物量和群落结构发生了变化。然而，土壤移植对微生物群落的影响被玉米种植所抑制，揭示了种植和移植之间的负相互作用。通过典范对应分析和Mantel检验进一步分析表明，年平均温度、相对湿度、地上生物量、土壤pH和NH 4（+）-N含量等环境属性与微生物功能结构密切相关。此外，氨氧化古菌（amoA-AOA）和氨氧化细菌（amoA-AOB）基因的平均丰度与土壤硝化能力显著相关（P <0. 05），氨氧化古菌和氨氧化细菌共同参与了土壤硝化功能过程。这些结果表明，土壤氮循环与微生物群落结构密切相关，两者都受到土壤移植到寒冷地区和植物种植的干扰。
Soil transplant into warmer regions has been shown to alter soil microbiology. In contrast, little is known about the effects of soil transplant into colder regions, albeit that climate cooling has solicited attention in recent years. To address this question, we transplanted bare fallow soil over large transects from southern China (subtropical climate zone) to central (warm temperate climate zone) and northern China (cold temperate climate zone). After an adaptation period of 4 years, soil nitrogen components, microbial biomass and community structures were altered. However, the effects of soil transplant on microbial communities were dampened by maize cropping, unveiling a negative interaction between cropping and transplant. Further statistical analyses with Canonical correspondence analysis and Mantel tests unveiled annual average temperature, relative humidity, aboveground biomass, soil pH and NH4 (+) -N content as environmental attributes closely correlated with microbial functional structures. In addition, average abundances of amoA-AOA (ammonia-oxidizing archaea) and amoA-AOB (ammonia-oxidizing bacteria) genes were significantly (P < 0.05) correlated with soil nitrification capacity, hence both AOA and AOB contributed to the soil functional process of nitrification. These results suggested that the soil nitrogen cycle was intimately linked with microbial community structure, and both were subjected to disturbance by soil transplant to colder regions and plant cropping.