干旱区生态环境知识资源中心(Arid): Nutrient and salinity management for spinach production under sprinkler irrigation in the low desert region of California

Arid

DOI	10.1007/s00271-021-00740-4
	Nutrient and salinity management for spinach production under sprinkler irrigation in the low desert region of California
	Bali, Khaled M.; Eltarabily, Mohamed G.; Berndtsson, Ronny; Selim, Tarek
通讯作者	Eltarabily, MG (corresponding author), Univ Calif, Kearney Agr Res & Extens Ctr, Parlier, CA 93648 USA. ; Eltarabily, MG (corresponding author), Port Said Univ, Civil Engn Dept, Fac Engn, Port Said 42523, Egypt.
来源期刊	IRRIGATION SCIENCE
ISSN	0342-7188
EISSN	1432-1319
出版年	2021
英文摘要	The efficiency of irrigation, as well as optimization of nutrients, affect spinach yield in all growth stages. In this study, the sensitivity of spinach (early and mature yields) to shallow saline groundwater and the effect of fertigation treatments on mature yield were experimentally investigated. The sprinkler irrigation experiments were conducted on 0.47 ha of silty clay soil at the University of California Desert Research and Extension Center (DREC) in Imperial Valley, California. Twelve beds in the experimental field were chosen randomly to investigate the effect of three fertigation treatments on spinach yield. Three rates of urea ammonium nitrate (UAN-32) fertilizer; T-1: 200 kg ha(-1) (150%), T-2: 133.3 kg ha(-1) (100%), and T-3: 66.7 kg ha(-1) (50%) in four replicates were applied. Soil samples to depths of up to 120 cm were collected at baby leaves and mature harvesting dates (17th October and 19th November 2019, respectively) for salinity measurements. Additionally, soil matric potential through the 120 cm soil depth was measured and groundwater levels in five observation wells were recorded during the growing season. Results showed that average soil salinity at baby leaves harvesting stage through the top 60 cm active root zone depth ranged from 0.61 to 1.48 dS m(-1), which is lower than the spinach salinity threshold limit (2 dS m(-1)), while the average groundwater depth was 1.90 m with salinity ranging from 6.35 to 10.60 dS m(-1). Correlation analysis showed that the baby spinach leaves yield was weakly correlated (r = 0.40) to the average soil salinity in the top 60 cm soil depth. Although groundwater and top 60 cm soil salinity showed an increase at the mature yield harvesting stage, the mature yield was weakly correlated to soil salinity (p = 0.116). As the UAN-32 rate increased, the mature spinach yield increased. The mature spinach yields were 17.31, 14.00, and 12.54 ton ha(-1) for T-1, T-2, and T-3 fertigation treatments, respectively. However, only a 10% reduction in yield occurred in T-3 treatment corresponding to a 50% reduction in UAN-32 rate by 66.7 kg ha(-1). Based on the results of this study, shallow saline groundwater has little impact on spinach yield. In addition, the 50% increase in UAN-32 rate had a significant impact on mature spinach yield. The 150% UAN-32 rate resulted in an increase in spinach yield and could be used in arid and semiarid regions with similar conditions to the Imperial Valley but additional measures to minimize the leaching of nitrate from the root zone and to reduce the load of nitrogen in drainage water are needed to minimize the potential negative impact of over-fertigation on the environment.
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000658107400001
WOS关键词	DEFICIT IRRIGATION ; OLERACEA L. ; SUNFLOWER
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352292
作者单位	[Bali, Khaled M.; Eltarabily, Mohamed G.] Univ Calif, Kearney Agr Res & Extens Ctr, Parlier, CA 93648 USA; [Eltarabily, Mohamed G.; Selim, Tarek] Port Said Univ, Civil Engn Dept, Fac Engn, Port Said 42523, Egypt; [Berndtsson, Ronny] Lund Univ, Div Water Resources Engn, Box 118, S-22100 Lund, Sweden; [Berndtsson, Ronny] Lund Univ, Ctr Adv Middle Eastern Studies, Box 201, S-22100 Lund, Sweden
推荐引用方式 GB/T 7714	Bali, Khaled M.,Eltarabily, Mohamed G.,Berndtsson, Ronny,et al. Nutrient and salinity management for spinach production under sprinkler irrigation in the low desert region of California[J]. University of California, Berkeley,2021.
APA	Bali, Khaled M.,Eltarabily, Mohamed G.,Berndtsson, Ronny,&Selim, Tarek.(2021).Nutrient and salinity management for spinach production under sprinkler irrigation in the low desert region of California.IRRIGATION SCIENCE.
MLA	Bali, Khaled M.,et al."Nutrient and salinity management for spinach production under sprinkler irrigation in the low desert region of California".IRRIGATION SCIENCE (2021).