Onion yield under agroecological farming system using distinct irrigation depths and soil covers
subject: Agricultura orgânica, Allium cepa L, eficiência do uso da água
description: ABSTRACT: 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.
creator: José Guilherme Marinho Guerra, Eduardo Castro Ribeiro, Daniel Fonseca de Carvalho, Lucas Antonio de Freitas Santos
source: Ciência Rural
publisher: Universidade Federal de Santa Maria
date: 2016
relation: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500783&lng=en&tlng=en
coverage: Agriculture (General), Agriculture