干旱区生态环境知识资源中心(Arid): Seasonal variation in yield, nutritive value, and antioxidant capacity of leaves of alfalfa plants grown in arid climate of Saudi Arabia

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DOI	10.4067/S0718-58392021000200182
	Seasonal variation in yield, nutritive value, and antioxidant capacity of leaves of alfalfa plants grown in arid climate of Saudi Arabia
	Soufan, Walid; Okla, Mohammad K.; Salamatullah, Ahmad; Hayat, Khizar; Abdel-Maksoud, Mostafa A.; Al-Amri, Saud S.
通讯作者	Soufan, W (corresponding author), King Saud Univ, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia.
来源期刊	CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
ISSN	0718-5839
出版年	2021
卷号	81 期号:2 页码:182-190
英文摘要	In addition to its high nutritional value, alfalfa (Medicago sativa L.) has several health benefits including antioxidant, neuroprotective, antimicrobial, antiulcer, hypocholesterolemic, hypolipidemic, and estrogenic effects. We aimed to assess the nutritional value and antioxidant capacity of alfalfa leaves at different times of the year in arid regions. Alfalfa was harvested in autumn, winter, spring, and summer and fresh yield and leaf:stem ratio were measured. Leaves were collected to determine their nutritional value and antioxidant capacity using two different extracts viz.: absolute ethanol or distilled water. Fresh yield and leaf:stem ratio were highest in spring (20 t ha(-1) and 57.6%, respectively), followed equally by winter and autumn, and were lowest in summer (10.75 t ha(-1) and 51.6%, respectively). The autumn cut had the highest crude protein (33.52%) and crude fat content (3.79%) and the lowest content of crude fiber (13.95%) and acid detergent fiber (16.55%), which are good indicators of suitability for human nourishment. However, leaves collected in autumn were characterized by lower digestibility values (86.2%) compared to the other cuts. Antioxidant capacity of leaves harvested in autumns and extracted with either ethanol or distilled water was examined in terms of total polyphenols, total flavonoids, DPPH scavenging capacity, and reducing power. Ethanol extract showed higher antioxidant capacity in terms of total phenol and total flavonoid contents (6.41 and 4.88 mg gallic acid equivalents g(-1) DW, respectively). These results suggest that autumn is the most appropriate season to cut alfalfa leaves for human nutritional purposes.
英文关键词	Antioxidants DPPH flavonoids food additives nutrition polyphenols
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:000643557900006
WOS关键词	DRY-MATTER PRODUCTION ; MEDICAGO-SATIVA L. ; PHENOLIC-COMPOUNDS ; IN-VITRO ; OPTIMIZATION ; EXTRACTION ; FLAVONOIDS ; PROTEINS ; IMPROVE ; VIVO
WOS类目	Agriculture, Multidisciplinary ; Agronomy
WOS研究方向	Agriculture
来源机构	King Saud University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349846
作者单位	[Soufan, Walid; Salamatullah, Ahmad; Hayat, Khizar] King Saud Univ, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia; [Okla, Mohammad K.; Abdel-Maksoud, Mostafa A.; Al-Amri, Saud S.] King Saud Univ, Coll Sci, POB 2455, Riyadh 11451, Saudi Arabia
推荐引用方式 GB/T 7714	Soufan, Walid,Okla, Mohammad K.,Salamatullah, Ahmad,et al. Seasonal variation in yield, nutritive value, and antioxidant capacity of leaves of alfalfa plants grown in arid climate of Saudi Arabia[J]. King Saud University,2021,81(2):182-190.
APA	Soufan, Walid,Okla, Mohammad K.,Salamatullah, Ahmad,Hayat, Khizar,Abdel-Maksoud, Mostafa A.,&Al-Amri, Saud S..(2021).Seasonal variation in yield, nutritive value, and antioxidant capacity of leaves of alfalfa plants grown in arid climate of Saudi Arabia.CHILEAN JOURNAL OF AGRICULTURAL RESEARCH,81(2),182-190.
MLA	Soufan, Walid,et al."Seasonal variation in yield, nutritive value, and antioxidant capacity of leaves of alfalfa plants grown in arid climate of Saudi Arabia".CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 81.2(2021):182-190.