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Closed Access item Compost as media constituents for vegetable crop transplant production

Authors:Sánchez-Monedero, Miguel Ángel
Roig, Asunción
Cegarra Rosique, Juan
Bernal Calderón, M. Pilar
Abad, A.
Keywords:High salt concentration, Vegetable Transplant Production
Issue Date:2004
Publisher:JG Press Inc
Citation:Compost Science and Utilization 12(2): 161-168 (2004)
Abstract:The use of compost with high salt concentration was evaluated, under commercial conditions, as a potential growing media constituent for vegetable transplant production. Two composts were prepared from sweet sorghum bagasse, pine bark, and either urea (compost A) or brewery sludge (compost B) as N source. Three vegetable species - broccoli (Brassica oleracea), tomato (Lycopersicum esculentum), and onion (Allium cepa) with different tolerance to salinity were used. Eleven substrates were formulated and tested: a control consisting of a moss peat-based commercial substrate; compost A; compost B; and, eight mixtures containing 33 or 67% by volume of each compost with either raw peat moss or commercial substrate as diluent. All the substrates prepared had suitable physical, physicochemical and chemical properties for use as growing media, except for the electrical conductivity (ranging from 3.20 to 13.21 dS m-1) which was above the reference levels for soilless cultivation. Broccoli was the least affected by substrate salinity whilst tomato was the most. Onion transplants had an intermediate response to saline conditions. Tomato seed germination was markedly reduced when compost A, with a higher salt concentration, was used at a rate higher than 67%. Media prepared with either of the composts, and mixed with either a commercial substrate or peat in a rate up to 67%, did not cause any detrimental effect on the growth and nutritional status of broccoli, tomato and onion transplants, despite the high initial salinity of the substrates. These composts appear to be acceptable substitutes for Sphagnum peat in seed sowing mixtures.
Publisher version (URL):http://www.jgpress.com/compostscience/archives/_free/000876.html#more
URI:http://hdl.handle.net/10261/16148
ISSN:1065-657X
Appears in Collections:(CEBAS) Artículos

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