气候变化领域集成服务门户(CCPortal): Does soil organic carbon quality or quantity govern relative temperature sensitivity in soil aggregates?

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DOI	10.1007/s10533-020-00653-y
	Does soil organic carbon quality or quantity govern relative temperature sensitivity in soil aggregates?
	Wankhede M.; Ghosh A.; Manna M.C.; Misra S.; Sirothia P.; Rahman M.M.; Bhattacharyya P.; Singh M.; Bhattacharyya R.; Patra A.K.
发表日期	2020
ISSN	0168-2563
起始页码	191
结束页码	206
卷号	148 期号:2
英文摘要	Soil aggregates govern soil organic carbon (SOC) sequestration. But, sparse understanding about the process leads to inaccuracy in predicting potential of soil to stabilize C in warming world. We appraised effects of 43 years of fertilization on relative temperature sensitivity of SOC decomposition (Q10) in soil aggregates to know whether SOC quality or quantity governs Q10. Treatments were: fallow, control, 100% recommended dose of nitrogen (N), N and phosphorus (NP), N, P and potassium (NPK), and NPK + farmyard manure (FYM) (NPK + FYM). Macroaggregates, microaggregates and silt + clay (s + c) fractions were incubated for 16 weeks at 25, 35 and 45 °C, SOC quality (R0) and Q10 were computed. SOC mineralization from macro- and micro- aggregates were 34 and 28% higher than s + c across the treatments. The s + c fraction of NPK + FYM had ~ 41, 40 and 24% higher C decay rate than NPK plots at 25, 35 and 45 °C, respectively. For s + c fraction Q10 increased over other aggregates. Mean Q10 of s + c fraction was ~ 18.3 and 17.5% higher than macro and micro-aggregate-C, respectively. R0 was the lowest for NPK + FYM, suggesting long-term manuring with balanced NPK significantly enhance recalcitrance of C. We observed Q10 of macroaggregates and s + c fraction is controlled by C quality but C quantity governs Q10 of microaggregates in Vertisol. Specifically, microaggregates of NPK + FYM were more temperature sensitive, and could be vulnerable to C loss. Hence, practices facilitating microaggregate formation should be avoided. Thus, we recommend manure application for facilitating C sequestration. © 2020, Springer Nature Switzerland AG.
英文关键词	Carbon sequestration; Manure application; Soil organic carbon mineralization; Vertisol
语种	英语
scopus关键词	carbon sequestration; decomposition; manure; microaggregate; organic carbon; soil aggregate; soil carbon; Vertisol
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153160
作者单位	Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Chitrakoot, Madhya Pradesh 485334, India; ICAR- Indian Grassland and Fodder Research Institute, Jhansi, Uttar Pradesh 284 003, India; Soil Biology Division, ICAR- Indian Institute of Soil Science, Bhopal, Madhya Pradesh 462 038, India; Uttar Banga Krishi Viswavidyalaya, Pundibari, West Bengal 736 165, India; GCER, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia; ICAR - National Rice Research Institute, Cuttack, Odisha 753 006, India; ICAR- Indian Agricultural Research Institute, New Delhi, 110 012, India
推荐引用方式 GB/T 7714	Wankhede M.,Ghosh A.,Manna M.C.,et al. Does soil organic carbon quality or quantity govern relative temperature sensitivity in soil aggregates?[J],2020,148(2).
APA	Wankhede M..,Ghosh A..,Manna M.C..,Misra S..,Sirothia P..,...&Patra A.K..(2020).Does soil organic carbon quality or quantity govern relative temperature sensitivity in soil aggregates?.Biogeochemistry,148(2).
MLA	Wankhede M.,et al."Does soil organic carbon quality or quantity govern relative temperature sensitivity in soil aggregates?".Biogeochemistry 148.2(2020).