Reconsidering the phosphorus limitation of soil microbial activity in tropical forests
Reconsidering the phosphorus limitation of soil microbial activity in tropical forests
复制标题
重新考虑热带森林土壤微生物活动的磷限制
DOI：
10.1111/1365-2435.13043
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发表时间：
2018-05
影响因子：
5.2
通讯作者：
Jiangming Mo
中科院分区：
文献类型：
--
作者：
Taiki Mori;Xiangkai Lu;Ryota Aoyagi;Jiangming Mo
产品中心1.长期以来，人们一直认为热带森林生态系统中土壤微生物活性受磷（P）而不是氮（N）的限制。在这项研究中，我们回顾了用于确定限制养分的方法，并评估了热带森林土壤中广泛存在的磷限制假说的有效性。2.最常用的分析方法需要测试施肥是否增加了微生物生物量或土壤呼吸。以微生物生物量为指标的施肥方法并不令人满意，因为现存微生物生物量并不总是微生物活性的信号。施肥后土壤呼吸的增加也是一个不足的指标，因为有机质分解对养分添加的负面反应也可能是由养分短缺（养分开采）造成的。营养物质的补充也可以使微生物群落向更共生的生物转变，这可能会表现出较低的微生物呼吸速率。3.与施氮相比，施磷可加速土壤有机质的分解，这与土壤微生物活性的养分限制无关。通过养分开采有机质分解对N添加的负响应是由N短缺驱动的，这是不太可能发生的与P. N添加通过化学反应抑制微生物活性，而P添加可以通过与土壤中的吸附位点结合的C的替换来刺激活性，提高C的可用性。因此，必须重新考虑磷限制假说，因为外源氮和磷添加对土壤微生物活性的对比效应，这可能导致对热带森林生态系统土壤微生物活性的磷限制的误判。4.我们建议在应用热带森林生态系统中土壤微生物活性受磷限制的说法时要谨慎，直到建立一种新的方法来准确地确定生态系统水平上限制土壤微生物活性的养分。我们提出了替代方法来描述土壤微生物的养分短缺。
Abstract..1.It has long been believed that soil microbial activity in tropical forest ecosystems is limited by phosphorus (P) rather than nitrogen (N) availability. In this study, we reviewed the methods used to determine the limiting nutrients and evaluated the validity of the widespread P-limitation hypothesis in tropical forest soils...2.The most commonly used analysis method entails testing whether fertilization increased microbial biomass or soil respiration. Fertilization using microbial biomass as an indicator was not a satisfactory method because standing microbial biomass does not always signal microbial activity. An increase in soil respiration after fertilization was also an insufficient indicator because the negative response shown by organic matter decomposition to nutrient addition can also be driven by nutrient shortage (nutrient mining). Nutrient amendment can also shift microbial communities toward more copiotrophic organisms, which may exhibit lower microbial respiration rates...3.We suggest that P addition may accelerate soil organic matter decomposition compared with N, which is independent of the nutrient limitation of soil microbial activity. The negative response of organic matter decomposition to N addition through nutrient mining is driven by N shortage, which is less likely to occur with P. N addition inhibits microbial activity via chemical reactions, whereas P addition may stimulate activity through replacement by C bound to sorption sites in the soil, improving C availability. Thus, the P-limitation hypothesis must be reconsidered because of the contrasting effects of exogenous N and P addition on soil microbial activity, which could lead to misdetection of P limitation on soil microbial activity in tropical forest ecosystems...4.We recommend caution in applying the statement that soil microbial activity in tropical forest ecosystems is limited by P until a novel method is established to accurately determine the nutrients limiting soil microbial activity at the ecosystem level. We propose alternative ways to describe nutrient shortage for soil microbes.
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DOI：
10.1038/ismej.2011.159
发表时间：
2012-05
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
--
作者：
Taiki Mori;C. Wachrinrat;D. Staporn;Ponthep Meunpong;Warawich Suebsai;K. Matsubara;Khitja Boonsri;Warisa Lumban;Manassawee Kuawong;Thanida Phukdee;Juruwan Srifai;K. Boonman
通讯作者：
Taiki Mori;C. Wachrinrat;D. Staporn;Ponthep Meunpong;Warawich Suebsai;K. Matsubara;Khitja Boonsri;Warisa Lumban;Manassawee Kuawong;Thanida Phukdee;Juruwan Srifai;K. Boonman
影响因子：
4
作者：
Benjamin L Turner;S. Joseph Wright
通讯作者：
Benjamin L Turner;S. Joseph Wright
影响因子：
4
作者：
P. Vitousek;R. Howarth
通讯作者：
P. Vitousek;R. Howarth
DOI：
10.1146/annurev.es.17.110186.001033
发表时间：
1986
期刊：
Annual Review of Ecology, Evolution, and Systematics
影响因子：
--
作者：
P. Vitousek;R. Sanford
通讯作者：
P. Vitousek;R. Sanford