气候变化领域集成服务门户(CCPortal): Nitrogen losses in desert oasis agroecosystem in China estimated using a nitrogen balance approach N losses in desert oasis agroecosystem

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DOI	10.1080/00380768.2021.1878472
	Nitrogen losses in desert oasis agroecosystem in China estimated using a nitrogen balance approach N losses in desert oasis agroecosystem
	Yang, Rong; Chen, Shiyang
通讯作者	Yang, R (通讯作者)，Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0038-0768
EISSN	1747-0765
起始页码	197
结束页码	205
卷号	67 期号:2
英文摘要	Agriculture depends on nitrogen (N) fertilizer, but its continuous application also causes several serious ecological and environmental problems. In desert oasis farmlands, environmental issues caused by N loss from excessive chemical N application have been previously reported. However, assessed N loss from desert oasis farmland ecosystems in northwestern China is lacking. Here, we assess the effects of cropping system and fertilizer rates on N loss rate in a desert oasis farmland, based on the 5-year monitoring data of N input and output. Maize/wheat yield and biomass N showed strong interannual variations and strongly related to N fertilizer rate. Soil total N and available N in the surface soil (0-20 cm) increased slightly, and N stock in 0-100 cm exhibited an increasing trend during the experiment period in all four cropping systems. 20.1-55.1% of input N were estimated to be lost to the environment, and sandy texture in new farmlands tends to promote N loss. New reclaimed farmland with sandy texture tends to increase N loss, but maize/wheat intercropping with alfalfa can alleviate it. We concluded that the maize/wheat intercropping with alfalfa could be an effective management practice to reduce N loss and improve N fertilizer use effectivity. However, avoided land transition from desert to farmland, and thus reduced the area of new oasis farmland could be the most essential strategy to reduce N loss in the desert oasis farmland ecosystems in northwestern China.
英文关键词	Crop biomass nitrogen; cropping systems; desert oasis; nitrogen balance; soil nitrogen stock
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Agriculture
WOS类目	Plant Sciences ; Environmental Sciences ; Soil Science
WOS记录号	WOS:000611105000001
来源期刊	SOIL SCIENCE AND PLANT NUTRITION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254290
作者单位	[Yang, Rong; Chen, Shiyang] Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yang, Rong,Chen, Shiyang. Nitrogen losses in desert oasis agroecosystem in China estimated using a nitrogen balance approach N losses in desert oasis agroecosystem[J]. 中国科学院西北生态环境资源研究院,2021,67(2).
APA	Yang, Rong,&Chen, Shiyang.(2021).Nitrogen losses in desert oasis agroecosystem in China estimated using a nitrogen balance approach N losses in desert oasis agroecosystem.SOIL SCIENCE AND PLANT NUTRITION,67(2).
MLA	Yang, Rong,et al."Nitrogen losses in desert oasis agroecosystem in China estimated using a nitrogen balance approach N losses in desert oasis agroecosystem".SOIL SCIENCE AND PLANT NUTRITION 67.2(2021).