干旱区生态环境知识资源中心(Arid): Tef (Eragrostis tef Trotter) Responses to Nitrogen Fertigation under Semi-Arid Mediterranean Climate

Arid

DOI	10.3390/agronomy10121870
	Tef (Eragrostis tef Trotter) Responses to Nitrogen Fertigation under Semi-Arid Mediterranean Climate
	Gashu, Kelem; Halpern, Moshe; Zipori, Isaac; Bustan, Amnon; Saranga, Yehoshua; Yermiyahu, Uri
通讯作者	Yermiyahu, U (corresponding author), Agr Res Org, Gilat Res Ctr, IL-85280 Gilat, Israel.
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2020
卷号	10 期号:12
英文摘要	Eragrostis tef (Zucc.) Trotter (tef) is a small annual grain, panicle-bearing, C-4 cereal crop native to Ethiopia, where it is a major staple food. The objectives of the present study were to characterize the responses of two tef genotypes to escalating nitrogen (N) levels in terms of shoot, root, and grain biomass production, N concentration and uptake, and to determine an optimum N range at which tef performance is maximized. The N was applied in the irrigation water (Fertigation) in order to provide a consistent concentration of N in the root zone. A second goal was to test the feasibility of growing tef in the hot, arid conditions of the Northern Negev Desert. Two experiments were carried out in the Gilat Research Station (Negev region, Israel), each testing two different genotypes of tef (405B and 406W), and each including five replicates for each treatment. In the winter of 2015-2016, tef plants were grown in perlite filled pots in a walk-in plastic-covered tunnel. Five different N treatments were applied through fertigation, meaning the fertilizer was applied with the irrigation water (10, 20, 40, 80, 120 mg L-1). All other nutrients were applied at the same sufficient rate. In the summer of 2016, tef plots were sown in open-field and applied with four different rates of N fertilization (0, 30, 60, 120 mg L-1). Biomass of the different plant parts, SPAD values, N, P and K concentration, and the lodging index were recorded in each experiment. The harvest index was also calculated. Optimum N fertigation concentration in both experiments was between 40 and 80 mg L-1, under which the time to flowering was decreased, and yield and grain protein concentration were optimized. Underfertilization caused a decrease in overall plant growth, whereas overfertilization caused an increase in vegetative growth at the expense of grain yield. Potassium uptake increased along with increased N availability, whereas P uptake did not. The fertilization rate will always need to take into account local soil and climate conditions. The field experiment also pointed to low harvest index as a major limitation on tef cultivation in the Northern Negev.
英文关键词	tef fertigation nitrogen growth parameters yield harvest index
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:000601713300001
WOS关键词	GRAIN-YIELD ; CHEMICAL-COMPOSITION ; DILUTION CURVE ; USE EFFICIENCY ; ZUCC. TROTTER ; BARLEY ; WHEAT ; GROWTH ; FREQUENCY ; CULTIVAR
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348704
作者单位	[Gashu, Kelem; Halpern, Moshe; Zipori, Isaac; Yermiyahu, Uri] Agr Res Org, Gilat Res Ctr, IL-85280 Gilat, Israel; [Gashu, Kelem; Saranga, Yehoshua] Hebrew Univ Jerusalem, Robert H Smith Fac Agr Food & Environm, IL-76100 Rehovot, Israel; [Bustan, Amnon] Ramat NegevWorks Ltd, Desert Agrores Ctr DARC, Ramat Negev R&D, IL-8551500 Halutza, Israel
推荐引用方式 GB/T 7714	Gashu, Kelem,Halpern, Moshe,Zipori, Isaac,et al. Tef (Eragrostis tef Trotter) Responses to Nitrogen Fertigation under Semi-Arid Mediterranean Climate[J]. Hebrew University of Jerusalem,2020,10(12).
APA	Gashu, Kelem,Halpern, Moshe,Zipori, Isaac,Bustan, Amnon,Saranga, Yehoshua,&Yermiyahu, Uri.(2020).Tef (Eragrostis tef Trotter) Responses to Nitrogen Fertigation under Semi-Arid Mediterranean Climate.AGRONOMY-BASEL,10(12).
MLA	Gashu, Kelem,et al."Tef (Eragrostis tef Trotter) Responses to Nitrogen Fertigation under Semi-Arid Mediterranean Climate".AGRONOMY-BASEL 10.12(2020).