Effects of spring fire and slope on the aboveground biomass, and organic C and N dynamics in a semi-arid grassland of northern China

doi:10.1007/s40333-019-0052-3

	Effects of spring fire and slope on the aboveground biomass, and organic C and N dynamics in a semi-arid grassland of northern China
	Zhao, Xiang ; Hu, Shuya 1; Dong, Jie 2; Ren, Min ; Zhang, Xiaolin ; Dong, Kuanhu ; Wang, Changhui 1
	2019
发表期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
卷号	11 期号:2 页码:267-279
摘要	The aboveground primary production is a major source of carbon (C) and nitrogen (N) pool and plays an important role in regulating the response of ecosystem and nutrient cycling to natural and anthropogenic disturbances. To explore the mechanisms underlying the effect of spring fire and topography on the aboveground biomass (AGB) and the soil C and N pool, we conducted a field experiment between April 2014 and August 2016 in a semi-arid grassland of northern China to examine the effects of slope and spring fire, and their potential interactions on the AGB and organic C and total N contents in different plant functional groups (C-3 grasses, C-4 grasses, forbs, Artemisia frigida plants, total grasses and total plants). The dynamics of AGB and the contents of organic C and N in the plants were examined in the burned and unburned plots on different slope positions (upper and lower). There were differences in the total AGB of all plants between the two slope positions. The AGB of grasses was higher on the lower slope than on the upper slope in July. On the lower slope, spring fire marginally or significantly increased the AGB of C-3 grasses, forbs, total grasses and total plants in June and August, but decreased the AGB of C-4 grasses and A. frigida plants from June to August. On the upper slope, however, spring fire significantly increased the AGB of forbs in June, the AGB of C-3 grasses and total grasses in July, and the AGB of forbs and C-4 grasses in August. Spring fire exhibited no significant effect on the total AGB of all plants on the lower and upper slopes in 2014 and 2015. In 2016, the total AGB in the burned plots showed a decreasing trend after fire burning compared with the unburned plots. The different plant functional groups had different responses to slope positions in terms of organic C and N contents in the plants. The lower and upper slopes differed with respect to the organic C and N contents of C-3 grasses, C-4 grasses, total grasses, forbs, A. frigida plants and total plants in different growing months. Slope position and spring fire significantly interacted to affect the AGB and organic C and N contents of C-4 grasses and A. frigida plants. We observed the AGB and organic C and N contents in the plants in a temporal synchronized pattern. Spring fire affected the functional AGB on different slope positions, likely by altering the organic C and N contents and, therefore, it is an important process for C and N cycling in the semi-arid natural grasslands. The findings of this study would facilitate the simulation of ecosystem C and N cycling in the semi-arid grasslands in northern China.
关键词	aboveground biomass plant functional group spring fire slope position N content organic C content semi-arid grassland
学科领域	Environmental Sciences
DOI	10.1007/s40333-019-0052-3
收录类别	SCI
语种	英语
WOS关键词	SPECIES COMPOSITION ; POPULATION VIABILITY ; MICROBIAL BIOMASS ; PLANT DIVERSITY ; NITROGEN-FERTILIZATION ; SPATIAL HETEROGENEITY ; TOPOGRAPHIC POSITION ; TALLGRASS PRAIRIE ; CARBON STORAGE ; NATIONAL-PARK
WOS研究方向	Environmental Sciences & Ecology
WOS记录号	WOS:000465023800009
出版者	SPRINGER HEIDELBERG
文献子类	Article
出版地	HEIDELBERG
EISSN	2194-7783
资助机构	National Key Basic Research and Development Program of ChinaNational Basic Research Program of China [2016YFC0500703] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31572452, 41573063, 31870438]
作者邮箱	wangch@ibcas.ac.cn
作品OA属性	Bronze
引用统计	被引频次：4[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/2S10CLM1/19878
专题	植被与环境变化国家重点实验室
作者单位	1.Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Beijing Inst Sci & Technol Informat, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xiang,Hu, Shuya,Dong, Jie,et al. Effects of spring fire and slope on the aboveground biomass, and organic C and N dynamics in a semi-arid grassland of northern China[J]. JOURNAL OF ARID LAND,2019,11(2):267-279.
APA	Zhao, Xiang.,Hu, Shuya.,Dong, Jie.,Ren, Min.,Zhang, Xiaolin.,...&Wang, Changhui.(2019).Effects of spring fire and slope on the aboveground biomass, and organic C and N dynamics in a semi-arid grassland of northern China.JOURNAL OF ARID LAND,11(2),267-279.
MLA	Zhao, Xiang,et al."Effects of spring fire and slope on the aboveground biomass, and organic C and N dynamics in a semi-arid grassland of northern China".JOURNAL OF ARID LAND 11.2(2019):267-279.

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