Title:	Onion yield under agroecological farming system using distinct irrigation and soil covers
Authors:	RIBEIRO, E. C. CARVALHO, D. F. de SANTOS, L. A. de F. GUERRA, J. G. M.
Affiliation:	EDUARDO CASTRO RIBEIRO, SIAGRO, TO; DANIEL FONSECA DE CARVALHO, UFRRJ; LUCAS ANTONIO DE FREITAS SANTOS, UFRRJ; JOSE GUILHERME MARINHO GUERRA, CNPAB.
Date Issued:	2016
Citation:	Ciência Rural, Santa Maria, v. 46, n. 5, p. 783-789, mar. 2016
Description:	The present study was carried out in order to evaluate the effects of irrigation depths applied through drip and presence/absence of soil cover in onion yield, under agroecological farming. The experiment was conducted in Seropédica, RJ, Brazil, from May to September 2012. The experimental design was a randomized complete block with split-plot design with 10 treatments and 7 replications, characterized by the presence (+S) and absence (-S) of soil cover and five irrigation depths according to percentages of the crop evapotranspiration (ETc): 0, 22, 45, 75 and 100% (0, 155, 220.6, 320.5 and 372,7mm in +S condition and 0, 145.5, 207.6, 285, 351,4mm in -S condition). The irrigation influenced by second-order polynomial regression the total yield of bulbs, percentage distribution of bulbs in diameter classes and water use efficiency (WUE) in the -S condition, and in the linear regression the WUE in +S condition. The soil cover promoted an increase on the total bulb yield, WUE and the percentage of bulbs classified in classes of greater diameter.
NAL Thesaurus:	water use efficiency
Keywords:	Allium cepa L Organic agriculture
ISSN:	1678-4596
DOI:	http://dx.doi.org/10.1590/0103-8478cr20150342
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAB)