The priming effect of organic matter: a question of microbial competition?
The priming effect of organic matter: a question of microbial competition?
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DOI：
10.1016/s0038-0717(03)00123-8
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发表时间：
2003-06-01
影响因子：
9.7
通讯作者：
Abbadie, L
中科院分区：
文献类型：
--
作者：
Fontaine, S;Mariotti, A;Abbadie, L
一般认为，低质量的土壤碳限制了土壤微生物可利用的能量，进而限制了土壤碳矿化的速率。引发效应，即新鲜有机物输入土壤后土壤有机物（SOM）分解速率的增加，通常被认为是由于新鲜有机物分解释放的能量的可用性更高而导致微生物活性的全球增加。然而，迄今为止的工作表明，供应的可用能量诱导SOM矿化没有影响。启动效应的机制比通常认为的要复杂得多。本综述的目的是建立一个概念模型的启动效应的基础上矛盾的结果，在文献中采用营养竞争的概念。当新鲜有机物进入土壤后，许多专门的微生物迅速生长，只分解新鲜有机物。我们推测，引发效应的结果从竞争的能量和营养物质的收购之间的微生物专门在新鲜的有机物的分解和那些喂养聚合的SOM。(C)2003爱思唯尔科技有限公司版权所有。
It is generally accepted that the low quality of soil carbon limits the amount of energy available for soil microorganisms, and in turn the rate of soil carbon mineralization. The priming effect, i.e. the increase in soil organic matter (SOM) decomposition rate after fresh organic matter input to soil, is often supposed to result from a global increase in microbial activity due to the higher availability of energy released from the decomposition of fresh organic matter. Work to date, however, suggests that supply of available energy induces no effect on SOM mineralization. The mechanisms of the priming effect are much more complex than commonly believed. The objective of this review was to build a conceptual model of the priming effect based on the contradictory results available in the literature adopting the concept of nutritional competition. After fresh organic matter input to soils, many specialized microorganisms grow quickly and only decompose the fresh organic matter. We postulated that the priming effect results from the competition for energy and nutrient acquisition between the microorganisms specialized in the decomposition of fresh organic matter and those feeding on polymerised SOM. (C) 2003 Elsevier Science Ltd. All rights reserved.