Quality of fresh organic matter affects priming of soil organic matter and substrate utilization patterns of microbes.
Quality of fresh organic matter affects priming of soil organic matter and substrate utilization patterns of microbes.
复制标题
新鲜有机质的质量影响土壤有机质的启动和微生物的基质利用模式
DOI：
10.1038/srep10102
复制
发表时间：
2015-05-11
影响因子：
4.6
通讯作者：
Bai E
中科院分区：
文献类型：
--
作者：
Wang H;Boutton TW;Xu W;Hu G;Jiang P;Bai E
人类活动引起的生物地球化学循环和气候系统的变化预计会改变植物凋落物输入土壤的数量和质量。新鲜有机质（FOM）品质的变化如何影响土壤有机质（SOM）矿化的启动效应（PE），目前仍存在争议。本研究测定了两种营养品质不同的13c标记玉米（玉米叶片和玉米茎）诱导的PE。来自两种不同森林类型的土壤得出了一致的结果：与秸秆处理的土壤相比，叶片组织处理的土壤从负PE到正PE的转换速度更快，因为微生物生长更快。但16 d后，秸秆处理土壤PE高于叶片处理土壤PE。磷脂脂肪酸（PLFA）结果表明，微生物对碳和其他营养物质的需求是观察到的PE的主要决定因素之一。因此，同时考虑微生物对营养物质的需求和FOM的供应对于理解PE的潜在机制至关重要。我们的研究表明，有机质质量的变化会影响微生物对基质和有机质矿化的利用，可能会加剧未来气候变化下的全球变暖问题。
Changes in biogeochemical cycles and the climate system due to human activities are expected to change the quantity and quality of plant litter inputs to soils. How changing quality of fresh organic matter (FOM) might influence the priming effect (PE) on soil organic matter (SOM) mineralization is still under debate. Here we determined the PE induced by two 13C-labeled FOMs with contrasting nutritional quality (leaf vs. stalk of Zea mays L.). Soils from two different forest types yielded consistent results: soils amended with leaf tissue switched faster from negative PE to positive PE due to greater microbial growth compared to soils amended with stalks. However, after 16 d of incubation, soils amended with stalks had a higher PE than those amended with leaf. Phospholipid fatty acid (PLFA) results suggested that microbial demand for carbon and other nutrients was one of the major determinants of the PE observed. Therefore, consideration of both microbial demands for nutrients and FOM supply simultaneously is essential to understand the underlying mechanisms of PE. Our study provided evidence that changes in FOM quality could affect microbial utilization of substrate and PE on SOM mineralization, which may exacerbate global warming problems under future climate change.
登录
查看更多内容
影响因子：
9.7
作者：
Potthast, Karin;Hamer, Ute;Makeschin, Franz
通讯作者：
Makeschin, Franz
DOI：
10.1111/j.1365-2745.2012.02014.x
发表时间：
2012-11-01
期刊：
The Journal of ecology
影响因子：
--
作者：
García-Palacios P;Maestre FT;Bardgett RD;de Kroon H
通讯作者：
de Kroon H
影响因子：
9.7
作者：
Fontaine, S;Mariotti, A;Abbadie, L
通讯作者：
Abbadie, L
影响因子：
9.7
作者：
Kuzyakov, Y;Bol, R
通讯作者：
Bol, R
影响因子：
4.9
作者：
Liu, Lingli;King, John S.;Giardina, Christian P.
通讯作者：
Giardina, Christian P.