干旱区生态环境知识资源中心(Arid): Grazing regulates soil N cycling of annual pastures by enhancing soil N turnover in arid climate condition

Arid

DOI	10.1002/ldr.4873
	Grazing regulates soil N cycling of annual pastures by enhancing soil N turnover in arid climate condition
	Guo, Yarong; Ning, Jiao; Lou, Shanning; Zhang, Cheng; Zhu, Wanhe; Hou, Fujiang
通讯作者	Hou, FJ
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2023
卷号	34 期号:18 页码:5733-5743
英文摘要	Nitrogen is the second limited factor in arid regions. Little information is available on soil N cycling and availability under grazing in arid regions, which is required to evaluate land-use management with respect to soil N availability and dynamics. In 2011, we established a rotational grazing field experiment in arid grassland. We conducted experiments to explore the effects of herbivores grazing on soil net N mineralization and N processes via changes in soil temperature, moisture, pH, and microbial biomass nitrogen (MBN) in 2016 and 2017. Our results showed that grazing did not alter soil N mineralization because higher soil moisture and soil MBN under grazing had positive and negative effects on soil N mineralization, thereby balancing soil N mineralization. Plant N uptake at the grazing plots was, nevertheless, 23% higher than that at the non-grazing plots. These demonstrated that grazing potentially improved soil inorganic N availability and alleviated soil N limitation in arid regions. Soil nitrification was main pathway of N transformation in arid regions. Grazing improved soil accumulation of NO3- content, resulting in environmental problems (such as N2O emission and N leaching); however, grazing had a little effect (similar to 15% increase) on soil N leaching and (similar to 7% decrease) on N2O emission. These N processes reflect important mechanisms of resilience and ecosystem stability under grazing in an N-limited environment. Our results provide an important perspective for grassland management, aiming to maintain soil N supplying capacity in annual pasture sustainably. Overall, our study suggests that grazing is an effective management practice for the sustainable usage of local grasslands, as it improves soil physicochemical and biological properties, which, in turn, increases N supply.
英文关键词	annual pasture arid region N cycling N mineralization rotational grazing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001052103300001
WOS关键词	EMISSIONS ; MINERALIZATION ; AVAILABILITY ; BIOMASS ; STEPPE ; CARBON
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397767
推荐引用方式 GB/T 7714	Guo, Yarong,Ning, Jiao,Lou, Shanning,et al. Grazing regulates soil N cycling of annual pastures by enhancing soil N turnover in arid climate condition[J],2023,34(18):5733-5743.
APA	Guo, Yarong,Ning, Jiao,Lou, Shanning,Zhang, Cheng,Zhu, Wanhe,&Hou, Fujiang.(2023).Grazing regulates soil N cycling of annual pastures by enhancing soil N turnover in arid climate condition.LAND DEGRADATION & DEVELOPMENT,34(18),5733-5743.
MLA	Guo, Yarong,et al."Grazing regulates soil N cycling of annual pastures by enhancing soil N turnover in arid climate condition".LAND DEGRADATION & DEVELOPMENT 34.18(2023):5733-5743.