干旱区生态环境知识资源中心(Arid): Response of soil inorganic nitrogen dynamics to planting age and vegetation type in artificial sand-fixing land

Arid

DOI	10.1002/ecs2.4869
	Response of soil inorganic nitrogen dynamics to planting age and vegetation type in artificial sand-fixing land
	Yang, Rong; Chen, Shiyang; Zhao, Wenzhi; Song, Shujun
通讯作者	Yang, R
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2024
卷号	15 期号:6
英文摘要	Vegetation restoration in dryland regions may be a powerful way to control desertification and promote local habitat recovery. In these artificial revegetation systems, ecosystem processes and functioning are strongly determined by nitrogen (N) availability, while soil inorganic N (SIN) is the major available N form and is absorbed as a main N source for plants. However, SIN dynamics, their influencing factors, and their relative importance to the ecosystem of these N-limited systems are not well understood. A field investigation was conducted to examine the monthly variations in SIN and its response to planting age and vegetation type in a typical artificial sand-fixing system in northwestern China. The SIN content in topsoil (0-20 cm) during the growing season ranged from 7.10 to 95.65 mg kg(-1), with a mean value of 27.14 mg kg(-1). Soil nitrate N had a dominant role in determining SIN monthly dynamics, which showed a fluctuating trend with two peak values in early July and late August. SIN showed a significant increasing trend with the planting age of sand-fixing vegetation, and it was highest for Nitraria sphaerocarpa (55.66 +/- 5.76 mg kg(-1)), followed by Haloxylon ammodendron (29.81 +/- 3.47 mg kg(-1)) and interspace (11.39 +/- 1.13 mg kg(-1)). SIN displayed a hump-shaped relationship with air temperature (R-2 = 0.96, p < 0.01) and had a maximum at 19.88 degrees C. The change rate of SIN was positively correlated with accumulated precipitation (R-2 = 0.99, p < 0.05). SIN was correlated significantly with soil organic carbon (SOC), total nitrogen (TN), and soil clay content. Our results revealed that climatic (air temperature and precipitation), abiotic (soil texture), plant (planting age and vegetation type), and nutrient-related (SOC and TN) factors regulate SIN dynamics in artificial sand-fixing vegetation systems. Climate was the predominant factor affecting soil ammonium N, and soil nutrients (SOC and TN) were the predominant factor affecting soil nitrate N. Therefore, these factors should be integrated into optimizing regional vegetation establishment and improving ecosystem management practices in sand-fixing lands.
英文关键词	desertification Haloxylon ammodendron precipitation sand-fixing vegetation soil inorganic nitrogen vegetation restoration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001252906100001
WOS关键词	WATER PULSES ; DESERT ; MINERALIZATION ; TEMPERATURE ; RESTORATION ; MOISTURE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403470
推荐引用方式 GB/T 7714	Yang, Rong,Chen, Shiyang,Zhao, Wenzhi,et al. Response of soil inorganic nitrogen dynamics to planting age and vegetation type in artificial sand-fixing land[J],2024,15(6).
APA	Yang, Rong,Chen, Shiyang,Zhao, Wenzhi,&Song, Shujun.(2024).Response of soil inorganic nitrogen dynamics to planting age and vegetation type in artificial sand-fixing land.ECOSPHERE,15(6).
MLA	Yang, Rong,et al."Response of soil inorganic nitrogen dynamics to planting age and vegetation type in artificial sand-fixing land".ECOSPHERE 15.6(2024).