干旱区生态环境知识资源中心(Arid): Effects of Planting Density and Nitrogen Application on Soil Greenhouse Gas Fluxes in the Jujube-Alfalfa Intercropping System in Arid Areas

Arid

DOI	10.3390/agronomy14020273
	Effects of Planting Density and Nitrogen Application on Soil Greenhouse Gas Fluxes in the Jujube-Alfalfa Intercropping System in Arid Areas
	Li, Tiantian; Wan, Sumei; Chen, Guodong; Cui, Zhengjun; Wang, Jinbin; Fan, Zhilong; Zhai, Yunlong
通讯作者	Chen, GD
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2024
卷号	14 期号:2
英文摘要	Increasing agricultural yields and reducing greenhouse gas (GHG) emissions are the main themes of agricultural development in the 21st century. This study investigated the yield and GHGs of a jujube-alfalfa intercropping crop, relying on a long-term field location experiment of intercropping in an arid region. The treatments included four planting densities (D1 (210 kg ha(-1) sowing rate; six rows), D2 (280 kg ha(-1) sowing rate; eight rows), D3 (350 kg ha(-1) sowing rate; ten rows)) and four nitrogen levels (N0 (0 kg ha(-1)), N1 (80 kg ha(-1)), N2 (160 kg ha(-1)), and N3 (240 kg ha(-1))) in the jujube-alfalfa intercropping system. The results showed that the jujube-alfalfa intercropping system is a the source of atmospheric CO2 and N2O, and the sink of CH4; the trend of CO2 fluxes was single peak, while the trend of N2O and CH4 fluxes was double peak, and there was a tendency for their valley peaks to become a mirror of each another. The magnitude of emissions under the nitrogen level was N3 > N2 > N1 > N0; the content of soil total nitrogen, quick-acting nitrogen, and the global warming potential (GWP) increased with an increase in the amount of nitrogen that was applied, but the pH showed the opposite tendency. The D2N2 treatment increased the total N, quick N, SOC, and SOM content to reduce the alfalfa GHG emission intensity (GHGI) by only 0.061 kg CO2-eq kg(-1) compared to the other treatments. D2N2 showed a good balance between yield benefits and environmental benefits. The total D2N2 yield was the most prominent among all treatments, with a 47.64% increase in yield in 2022 compared to the D1N0 treatment. The results showed that the optimization of planting density and N fertilization reduction strategies could effectively improve economic efficiency and reduce net greenhouse gas emissions. In the jujube-alfalfa intercropping system, D2N2 (eight rows planted in one film 160 N = 160 kg ha(-1)) realized the optimal synergistic effect between planting density and nitrogen application, and the results of this study provide theoretical support for the reduction in GHGs emissions in northwest China without decreasing the yield of alfalfa forage.
英文关键词	jujube-alfalfa intercropping nitrogen application planting density GHGs emission global warming potential
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:001172787300001
WOS关键词	USE EFFICIENCY ; CLIMATE-CHANGE ; EMISSIONS ; FERTILIZER ; YIELD ; PRODUCTIVITY ; IRRIGATION ; MITIGATION ; RETURNS ; MAIZE
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402747
推荐引用方式 GB/T 7714	Li, Tiantian,Wan, Sumei,Chen, Guodong,et al. Effects of Planting Density and Nitrogen Application on Soil Greenhouse Gas Fluxes in the Jujube-Alfalfa Intercropping System in Arid Areas[J],2024,14(2).
APA	Li, Tiantian.,Wan, Sumei.,Chen, Guodong.,Cui, Zhengjun.,Wang, Jinbin.,...&Zhai, Yunlong.(2024).Effects of Planting Density and Nitrogen Application on Soil Greenhouse Gas Fluxes in the Jujube-Alfalfa Intercropping System in Arid Areas.AGRONOMY-BASEL,14(2).
MLA	Li, Tiantian,et al."Effects of Planting Density and Nitrogen Application on Soil Greenhouse Gas Fluxes in the Jujube-Alfalfa Intercropping System in Arid Areas".AGRONOMY-BASEL 14.2(2024).