干旱区生态环境知识资源中心(Arid): Effects of vegetation presence on soil net N mineralization are independent of landscape position and vegetation type in an eroding watershed

Arid

DOI	10.1016/j.agee.2021.107743
	Effects of vegetation presence on soil net N mineralization are independent of landscape position and vegetation type in an eroding watershed
	Kong, Weibo; Yao, Yufei; Hou, Lingcao; Bao, Kaiqiang; Zhang, Liqiong; Wei, Xiaorong
通讯作者	Wei, XR (corresponding author), Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, State Key Lab Soil Eros & Dryland Farming Loess P, Minist Educ, Yangling 712100, Shaanxi, Peoples R China.
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2022
卷号	325
英文摘要	Soil erosion can dramatically alter soil nitrogen (N) cycling, but it has rarely been examined under in-situ conditions due to the complicated interaction between erosion and vegetation. Comparing the effects of vegetation presence at eroding and depositional sites would provide a direct understanding of such effects. Herein, we investigated how soil N dynamics (mineral N pools and net N mineralization rates) responded to vegetation presence (plot with vs. without vegetation), landscape position (eroding vs. depositional sites) and vegetation type (grassland vs. woodland) during a two-year manipulation experiment using an in-situ incubation method in the hilly-gully region of China's Loess Plateau. The results showed that soils on eroding site had higher concentrations of nitrate (3.820 +/- 0.302 vs. 2.642 +/- 0.280 mg kg-1) and mineral N (5.853 +/- 0.320 vs. 4.308 +/- 0.287 mg kg-1) but similar rates of net nitrification (0.057 +/- 0.013 vs. 0.051 +/- 0.011 mg kg-1 d-1) and mineralization (0.056 +/- 0.014 vs. 0.056 +/- 0.013 mg kg-1 d-1) in comparison to depositional site in all grassland plots. The concentrations of soil nitrate and mineral N and rates of net nitrification and mineralization in legume woodland were 26%, 19%, 88% and 64% higher than that in grassland in all slope plots, respectively. Although vegetation presence significantly decreased soil nitrate (-57%) and total mineral N (-27%) concentrations, it did not affect the rates of net nitrification and mineralization. The effects of vegetation presence on soil net N mineralization occurred irrespective of landscape position and vegetation type(P > 0.05), but varied with season or year, with greater effects in 2017 growing season than in the non-growing season and 2018 growing season. Redundancy analysis and hierarchical partitioning indicated that the above- and blow-ground biomass accounted for most of the variation in soil N mineralization. These results suggested that the variations in soil mineral N and net N mineralization in relation to vegetation presence in this eroding watershed were consistent across different landscape positions and vegetation types, but showed intra- and inter-annual variability.
英文关键词	Nitrogen mineralization Vegetation presence Landscape position Vegetation type Eroding environment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000719266400002
WOS关键词	GROSS NITROGEN MINERALIZATION ; LOESS PLATEAU ; TENGGER DESERT ; GROWING-SEASON ; SLOPE ASPECT ; LAND-USE ; CARBON ; TEMPERATURE ; EROSION ; NITRIFICATION
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374558
作者单位	[Kong, Weibo; Yao, Yufei; Wei, Xiaorong] Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, State Key Lab Soil Eros & Dryland Farming Loess P, Minist Educ, Yangling 712100, Shaanxi, Peoples R China; [Wei, Xiaorong] CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China; [Hou, Lingcao; Bao, Kaiqiang; Wei, Xiaorong] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China; [Zhang, Liqiong] Ankang Univ, Sch Modern Agr & Biotechnol, Ankang 725000, Peoples R China; [Kong, Weibo; Yao, Yufei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Kong, Weibo,Yao, Yufei,Hou, Lingcao,et al. Effects of vegetation presence on soil net N mineralization are independent of landscape position and vegetation type in an eroding watershed[J],2022,325.
APA	Kong, Weibo,Yao, Yufei,Hou, Lingcao,Bao, Kaiqiang,Zhang, Liqiong,&Wei, Xiaorong.(2022).Effects of vegetation presence on soil net N mineralization are independent of landscape position and vegetation type in an eroding watershed.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,325.
MLA	Kong, Weibo,et al."Effects of vegetation presence on soil net N mineralization are independent of landscape position and vegetation type in an eroding watershed".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 325(2022).