干旱区生态环境知识资源中心(Arid): Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China

Arid

DOI	10.1016/j.agwat.2021.106764
	Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China
	Liu, Minguo; Wang, Zikui; Mu, Le; Xu, Rui; Yang, Huimin
通讯作者	Yang, HM (corresponding author), Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	248
英文摘要	Irrigation plays a fundamental role in sustanining the productivity of agricultural systems in the inland arid area of midwestern China. Deficit irrigation can help to balance yield outcome and water input. Few studies have investigated the impact of deficit irrigation on alfalfa performance, which shows great differences from grain crops in water requirement and management strategy. The study aimed to evaluate the effect of regulated deficit irrigation on forage yield and quality of alfalfa (Medicago sativa). A three year trial was carried out with two irrigation systems (flood irrigation, FI and subsurface drip irrigation, SDI) and seven contrasting regulated irrigation treatments, and alfalfa growth, productivity and water use were measured. Under both irrigation systems, alfalfa forage yield decreased with decreasing irrigation amount under whole stage irrigation, while forage quality improved. However, the performance of alfalfa was different when deficit irrigation was applied at various growth stages. Compared with other deficit irrigation treatments, regulated deficit irrigation at single growth stage usually led to a higher yield. There was an exponential relationship between plant height and forage yield (R-2 = 0.62 for FI and R-2 = 0.57 for SDI) and a linear relationship between leaf area index and forage yield (R-2 = 0.56 for FI and R-2 = 0.64 for SDI). There was a negative correlation between forage yield and quality, which was closer to some quadratic relationships. Therefore, regulated deficit irrigation can help to achieve an ideal yield (up to 34.9 t/ha) and quality in this area. In the inland arid area of midwestern China, subsurface drip irrigation showed a higher irrigation water use efficiency (13.8-84.4 kg/(ha mm)) than flood irrigation (10.8-66.6 kg/(ha mm)) for alfalfa production. With limited water supply, deficit irrigation at single growth stage usually maintained a higher forage yield compared to slightly stressed irrigation during the whole growth. Deficit irrigation at the branching stage led to more negative effect on forage yield compared to other single stages.
英文关键词	Lucerne Dry matter yield Forage quality Irrigation water use efficiency Flood irrigation Subsurface drip irrigation Regulated deficit irrigation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632327800003
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349328
作者单位	[Liu, Minguo; Wang, Zikui; Mu, Le; Xu, Rui; Yang, Huimin] Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China
推荐引用方式 GB/T 7714	Liu, Minguo,Wang, Zikui,Mu, Le,et al. Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China[J]. 兰州大学,2021,248.
APA	Liu, Minguo,Wang, Zikui,Mu, Le,Xu, Rui,&Yang, Huimin.(2021).Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China.AGRICULTURAL WATER MANAGEMENT,248.
MLA	Liu, Minguo,et al."Effect of regulated deficit irrigation on alfalfa performance under two irrigation systems in the inland arid area of midwestern China".AGRICULTURAL WATER MANAGEMENT 248(2021).