Passive and active ecological restoration strategies for abandoned farmland leads to shifts in potential soil nitrogen loss by denitrification and soil denitrifying microbes

doi:10.1002/ldr.3523

	Passive and active ecological restoration strategies for abandoned farmland leads to shifts in potential soil nitrogen loss by denitrification and soil denitrifying microbes
	Wang, Honglei 1; Shu, Duntao 2; Liu, Dong 3; Liu, Shuang 2; Den, Na 1; An, Shaoshan 1
通讯作者	An, Shaoshan(shan@ms.iswc.ac.cn)
	2020-01-23
发表期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
页码	13
摘要	Ecological restorations of abandoned farmland have been performed in degraded ecosystems with the goal of increasing ecosystem sustainability. The environmental benefits of ecological restoration can at least be partially neutralized by enhanced nitrogen (N) loss and potential nitrous oxide (N2O) emissions via denitrification. However, few studies have focussed on comparative analysis of the contributions of ecological restoration strategies to soil denitrifying microbes, particularly in arid and semiarid degraded ecosystems, where N is often the limiting nutrient. In this study, artificial afforestation (artificial forest sites) and natural revegetation (grassland sites) of abandoned farmland have an enhanced effect on reducing potential denitrification rates (PDR) compared with farmland sites and orchard sites, leading to lower N losses and potential N2O emissions. Combined analyses indicated that the greatest differences in microbial abundance, species richness, and diversity were observed among different ecological restoration strategies. The abundance, richness, and diversities of denitrifying microbes (nirS, nirK, and nosZ genes) were decreased by natural revegetation and artificial afforestation, leading to attenuated denitrifying activity responsible for the reduced PDR. Notably, the abundance and diversity of denitrifying microbes were dominant variables that explained the changes in PDR (up to 0.96). Overall, our results contribute to a better understanding of the feedback of denitrifying microorganisms to ecological restoration strategies and how these microorganisms collaboratively contribute to N loss and potential N2O emissions in arid and semiarid degraded ecosystems.
关键词	abandoned farmland degraded ecosystem denitrification rate denitrifying microbes ecological restoration
DOI	10.1002/ldr.3523
收录类别	SCI ; SCI
语种	英语
WOS记录号	WOS:000508901800001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/70501
专题	中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者	An, Shaoshan
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dry Land Farming Loess, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 2.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Shaanxi Key Lab Agr & Environm Microbiol, Coll Life Sci, Yangling, Shaanxi, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Honglei,Shu, Duntao,Liu, Dong,et al. Passive and active ecological restoration strategies for abandoned farmland leads to shifts in potential soil nitrogen loss by denitrification and soil denitrifying microbes[J]. LAND DEGRADATION & DEVELOPMENT,2020:13.
APA	Wang, Honglei,Shu, Duntao,Liu, Dong,Liu, Shuang,Den, Na,&An, Shaoshan.(2020).Passive and active ecological restoration strategies for abandoned farmland leads to shifts in potential soil nitrogen loss by denitrification and soil denitrifying microbes.LAND DEGRADATION & DEVELOPMENT,13.
MLA	Wang, Honglei,et al."Passive and active ecological restoration strategies for abandoned farmland leads to shifts in potential soil nitrogen loss by denitrification and soil denitrifying microbes".LAND DEGRADATION & DEVELOPMENT (2020):13.