干旱区生态环境知识资源中心(Arid): Effects of nitrogen fertilization combined with subsurface irrigation on alfalfa yield, water and nitrogen use efficiency, quality, and economic benefits

Arid

DOI	10.3389/fpls.2024.1339417
	Effects of nitrogen fertilization combined with subsurface irrigation on alfalfa yield, water and nitrogen use efficiency, quality, and economic benefits
	Ma, Hongxiu; Jiang, Peng; Zhang, Xiaojuan; Ma, Wenli; Cai, Zhanhong; Sun, Quan
通讯作者	Sun, Q
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2024
卷号	15
英文摘要	Proper water and fertilizer management strategies are essential for alfalfa cultivation in arid areas. However, at present, the optimal amounts of subsurface irrigation and nitrogen (N) supply for alfalfa (Medicago sativa L.) cultivation are still unclear. Therefore, a field experiment was conducted in 2022 in Yinchuan, Ningxia, China, to explore the effects of different subsurface irrigation levels (W-1, 50% of ETC (crop evapotranspiration); W-2, 75% of ETC; W-3, 100% of ETC) and N application rates (N-0, 0 kg/ha; N-1, 75 kg/ha; N-2, 150 kg/ha; N-3, 225 kg/ha; N-4, 300 kg/ha) on alfalfa yield, crop water productivity (CWP), N use efficiency (NUE), quality, and economic benefits. Besides, the least squares method and multiple regression analysis were used to explore the optimal water and N combination for alfalfa cultivation under subsurface irrigation. The results showed that the alfalfa yield, crude ash content, and partial factor productivity from applied N (PFPN) were the highest under W-2 level, but there was no difference in PFPN compared with that under W-3 level. The branch number (BN), leaf area index (LAI), yield, CWP, irrigation water productivity (IWP), crude protein content (CPC), and economic benefits increased and then decreased with the increase of N application rate, reaching a maximum at the N-2 or N-3 level, while the NUE and PFPN decreased with the increase of N application rate. Considering the yield, CWP, NUE, quality, and economic benefits, W2N2 treatment was the optimal for alfalfa cultivation under subsurface irrigation. Besides, when the irrigation volume and N application rate were 69.8 similar to 88.7% of ETC and 145 similar to 190 kg/ha, respectively (confidence interval: 85%), the yield, CPC, and economic benefits reached more than 85% of the maximum. This study will provide technique reference for the water and N management in alfalfa cultivation in Northwest China.
英文关键词	multiple regression analysis Medicago sativa L. fertilizer management water productivity crude protein content
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:001160941700001
WOS关键词	DRIP IRRIGATION ; PRODUCTIVITY ; GRASSLAND ; DEFICIT
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403877
推荐引用方式 GB/T 7714	Ma, Hongxiu,Jiang, Peng,Zhang, Xiaojuan,et al. Effects of nitrogen fertilization combined with subsurface irrigation on alfalfa yield, water and nitrogen use efficiency, quality, and economic benefits[J],2024,15.
APA	Ma, Hongxiu,Jiang, Peng,Zhang, Xiaojuan,Ma, Wenli,Cai, Zhanhong,&Sun, Quan.(2024).Effects of nitrogen fertilization combined with subsurface irrigation on alfalfa yield, water and nitrogen use efficiency, quality, and economic benefits.FRONTIERS IN PLANT SCIENCE,15.
MLA	Ma, Hongxiu,et al."Effects of nitrogen fertilization combined with subsurface irrigation on alfalfa yield, water and nitrogen use efficiency, quality, and economic benefits".FRONTIERS IN PLANT SCIENCE 15(2024).