The influence of drought intensity on soil respiration during and after multiple drying-rewetting cycles

doi:10.1016/j.soilbio.2018.09.018

	The influence of drought intensity on soil respiration during and after multiple drying-rewetting cycles
	Li, Jin-Tao 1,2; Wang, Jun-Jian 2; Zeng, De-Hui 3; Zhao, Shan-Yu 3,4; Huang, Wan-Ling 2; Sun, Xue-Kai 3; Hu, Ya-Lin 1,3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2018-12-01
卷号	127 页码:82-89
关键词	Drought Drying-rewetting Soil respiration Legacy effect Semi-arid region
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2018.09.018
英文摘要	Global climate change is projected to intensify soil drying-rewetting (DRW) events with extended drought, especially in arid and semiarid ecosystems. However, the extent to which the soil DRW with intensified drought can alter soil respiration (R-s) in forests is still under debate, and subsequent legacy effects on R-s are not well understood. Here, we conducted a 180-d soil incubation experiment to investigate how soil DRW with different drought intensities alter the R-s in poplar (Populus simonii) and Mongolian pine (Pinus sylvestris var. mongolica) plantations. The incubation experiment included four 30-d cycles of 1) constant moisture treatment (control), 2) DRW with 10-d drying and 20-d rewetting (DRW10-20) or 3) DRW with 20-d drying and 10-d rewetting (DRW20-10), and then an extended 60-d incubation under constant moisture. During the four DRW cycles, the direct C release with respiration of Mongolian pine soils (27 g C.m(-2) in DRW10-20 and 140 g C.m(-2) in DRW20-10, respectively) decreased to a much lower extent than that of poplar soils (228 g C.m(-2) in DRW10-20 and 498 g C.m(-2) in DRW20-10, respectively). R-s did not significantly change during the extended 60-d incubation in the DRW10-20 treatment compared to control treatment. However, the respired CO2 were increased by 68 g C.m(-2) in the poplar soils and 19 g(-2) C.m(-2) in the Mongolian pine soils in the DRW20-10 treatment, which approximately compensated for 14% of the decreases of total respiration during four DRW cycles. This legacy effect induced by the DRW with intensified drought was attributed to the higher amount of remaining substrates and soil microbial biomass. Our study highlights that DRW can cause both direct and legacy effects on R-s, but the effects vary with drought intensity and forest type.
资助项目	National Natural Science Foundation of China (NSFC)[41271318] ; National Natural Science Foundation of China (NSFC)[41401262] ; National Natural Science Foundation of China (NSFC)[41807360] ; Southern University of Science and Technology[G01296001]
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000449895600010
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123710]
专题	中国科学院沈阳应用生态研究所
通讯作者	Hu, Ya-Lin
作者单位	1.Fujian Agr & Forestry Univ, Coll Forestry, Fuzhou 350002, Fujian, Peoples R China 2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, Daqinggou Ecol Stn, Shenyang 110016, Liaoning, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Jin-Tao,Wang, Jun-Jian,Zeng, De-Hui,et al. The influence of drought intensity on soil respiration during and after multiple drying-rewetting cycles[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,127:82-89.
APA	Li, Jin-Tao.,Wang, Jun-Jian.,Zeng, De-Hui.,Zhao, Shan-Yu.,Huang, Wan-Ling.,...&Hu, Ya-Lin.(2018).The influence of drought intensity on soil respiration during and after multiple drying-rewetting cycles.SOIL BIOLOGY & BIOCHEMISTRY,127,82-89.
MLA	Li, Jin-Tao,et al."The influence of drought intensity on soil respiration during and after multiple drying-rewetting cycles".SOIL BIOLOGY & BIOCHEMISTRY 127(2018):82-89.