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底物添加对森林2个不同演替阶段土壤氨基糖动态的影响

王辛辛 何红波 胡国庆 邵鹏帅 张威 解宏图 张旭东

王辛辛, 何红波, 胡国庆, 邵鹏帅, 张威, 解宏图, 张旭东. 底物添加对森林2个不同演替阶段土壤氨基糖动态的影响[J]. 北京林业大学学报, 2016, 38(4): 86-93. doi: 10.13332/j.1000-1522.20150396
引用本文: 王辛辛, 何红波, 胡国庆, 邵鹏帅, 张威, 解宏图, 张旭东. 底物添加对森林2个不同演替阶段土壤氨基糖动态的影响[J]. 北京林业大学学报, 2016, 38(4): 86-93. doi: 10.13332/j.1000-1522.20150396
WANG Xin-xin, HE Hong-bo, HU Guo-qing, SHAO Peng-shuai, ZHANG Wei, XIE Hong-tu, ZHANG Xu-dong. Effects of substrates on dynamics of amino sugars in two different stages of succession in forest soil[J]. Journal of Beijing Forestry University, 2016, 38(4): 86-93. doi: 10.13332/j.1000-1522.20150396
Citation: WANG Xin-xin, HE Hong-bo, HU Guo-qing, SHAO Peng-shuai, ZHANG Wei, XIE Hong-tu, ZHANG Xu-dong. Effects of substrates on dynamics of amino sugars in two different stages of succession in forest soil[J]. Journal of Beijing Forestry University, 2016, 38(4): 86-93. doi: 10.13332/j.1000-1522.20150396

底物添加对森林2个不同演替阶段土壤氨基糖动态的影响

doi: 10.13332/j.1000-1522.20150396
基金项目: 

“973”国家重点基础研究发展计划项目(2011CB403202)、国家自然科学基金项目(41571237)

详细信息
    作者简介:

    王辛辛。主要研究方向:土壤氮素转化。Email: wangxinxin891218@163.com 地址:110016 辽宁省沈阳市沈河区文化路72号中国科学院沈阳应用生态研究所南楼203。
    责任作者: 何红波,研究员。主要研究方向:土壤氮素转化。 Email:hehongbo@ iae.ac.cn 地址:同上。

    王辛辛。主要研究方向:土壤氮素转化。Email: wangxinxin891218@163.com 地址:110016 辽宁省沈阳市沈河区文化路72号中国科学院沈阳应用生态研究所南楼203。
    责任作者: 何红波,研究员。主要研究方向:土壤氮素转化。 Email:hehongbo@ iae.ac.cn 地址:同上。

Effects of substrates on dynamics of amino sugars in two different stages of succession in forest soil

  • 摘要: 以鼎湖山马尾松林和季风林2个演替阶段的土壤为研究对象,采用室内恒温(25 ℃)培养,研究了葡萄糖和不同数量无机氮施入对土壤氨基糖(氨基葡萄糖、氨基半乳糖和胞壁酸)动态的影响,并利用氨基葡萄糖和胞壁酸的比值探讨了真菌和细菌残留物在碳氮固持过程中的相对贡献。结果表明:在整个培养期间,季风林土壤氨基糖总量显著高于马尾松林,尤其在培养初期,增幅远高于马尾松林, 在培养后期,马尾松林土壤氨基糖含量下降幅度高于季风林。底物添加对不同微生物来源的氨基糖单体含量的影响也有所差异,以胞壁酸为代表的细菌细胞壁残留物比真菌更易受到外源物质的影响,但真菌细胞壁残留物对土壤有机质的截获和稳定作用大于细菌。真菌、细菌残留物的积累和转化过程可以通过氨基葡萄糖和胞壁酸的比值反映,细菌在培养前期更容易利用外源物质,但随着培养时间的进行,真菌占据了主导地位。不同碳氮比的外源底物对氨基糖总量和各氨基糖单体含量的动态影响不显著。与马尾松林相比,处在演替顶级的季风林土壤易于利用活性底物,显著促进了碳氮的微生物固持和微生物残留物在土壤中的保留,这说明土壤氨基糖作为微生物残留物可以探讨土壤碳氮的耦合机制,对调节土壤碳氮的养分平衡具有重要意义。

     

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  • 收稿日期:  2015-11-06
  • 刊出日期:  2016-04-30

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