Larger Q(10) of carbon decomposition in finer soil particles does not bring long-lasting dependence of Q(10) on soil texture

doi:10.1111/ejss.12530

	Larger Q(10) of carbon decomposition in finer soil particles does not bring long-lasting dependence of Q(10) on soil texture
	Ding, F.; Sun, W.; Huang, Y.; Hu, X.
	2018
发表期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
卷号	69 期号:2 页码:336-347
摘要	Soil particle-size fractionation is a reliable approach for the separation of carbon (C) pools with different stabilities. Our previous study found that C decomposition in fine soil particles had greater temperature sensitivity (Q(10)) than in coarse particles in grassland and forest soils. However, it is not known whether this phenomenon occurs in cropland soil and whether it generally suggests a dependence of Q(10) on soil texture. We carried out a 107-day incubation of isolated soil particles from cropland soil, including paddy and upland, with contrasting fertilizer applications. The incubation was carried out over three short-term cycles of sequentially changing temperatures between 5 and 30 degrees C at 5 degrees C intervals. The results indicated that C decomposition was faster in the sand (>50 m) fraction than in the silt (2-50 m) and clay (<2 m) fractions. However, Q(10) was generally larger in the clay fractions than in the other two fractions for all types of cropland soil, which is in accordance with our previous study. This suggested that the passive C pool is more sensitive to climate warming than the labile C pool. Considering the aforementioned Q(10) pattern across soil particles, we hypothesized that fine-textured soil should have a larger Q(10) than coarse-textured soil. However, we observed this outcome in the first and second temperature cycles only, but not in the third. In conclusion, a larger Q(10) in finer soil particles is probably a widespread phenomenon, but it does not bring a long-lasting dependence of Q(10) on soil texture.
学科领域	Soil Science
DOI	10.1111/ejss.12530
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; TEMPERATURE SENSITIVITY ; SIZE FRACTIONS ; CLAY CONTENT ; SUBSTRATE AVAILABILITY ; RESPIRATION ; MINERALIZATION ; STABILIZATION ; MECHANISMS ; INCREASES
WOS记录号	WOS:000426727100011
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2389
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31370492, 41601307]
作者邮箱	sunwj@ibcas.ac.cn
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20562
专题	植被与环境变化国家重点实验室
作者单位	1.[Ding, F. 2.Sun, W. 3.Huang, Y. 4.Hu, X.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 5.[Ding, F.] Shenyang Agr Univ, Coll Land & Environm, Dongling Rd, Shenyang 110866, Liaoning, Peoples R China 6.Hu, X.] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ding, F.,Sun, W.,Huang, Y.,et al. Larger Q(10) of carbon decomposition in finer soil particles does not bring long-lasting dependence of Q(10) on soil texture[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2018,69(2):336-347.
APA	Ding, F.,Sun, W.,Huang, Y.,&Hu, X..(2018).Larger Q(10) of carbon decomposition in finer soil particles does not bring long-lasting dependence of Q(10) on soil texture.EUROPEAN JOURNAL OF SOIL SCIENCE,69(2),336-347.
MLA	Ding, F.,et al."Larger Q(10) of carbon decomposition in finer soil particles does not bring long-lasting dependence of Q(10) on soil texture".EUROPEAN JOURNAL OF SOIL SCIENCE 69.2(2018):336-347.

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