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Sustratos para cultivos hortícolas y flores de corte

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DOI: 10.13140/2.1.2284.1280 · Available from: Maria Fernanda Quintero, Jun 02, 2015
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    ABSTRACT: Replacement of rockwool as growing media by more readily renewable materials or by waste product is now a worldwide target. One purpose of this study was to identify a suitable waste based growing media for greenhouse tomato and to test how their physical properties, affected by their particle shape, were related to yield. The performance of seven substrates made of rockwool, sawdust, wood shaving, composted bark and peat pure or in mixture were compared based on water retention characteristics, hydraulic conductivity, pore tortuosity, and gas diffusivity. Peat and bark pure and in mixtures gave similar yield as rockwool while sawdust and shaving lead to lower yield only during the second year of production. Yield was not related to physical properties although they greatly vary between substrates. The results indicated that if irrigation was adjusted for the physical properties of substrates, then different recycling organic materials with various particle sizes and shapes can be used for tomato production in greenhouses.
    Acta horticulturae 02/2004; 644:307-311.
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    ABSTRACT: An inventory of materials suitable for use as growing media for ornamental potted plant production in Spain has been prepared. Special attention has been paid to solid organic wastes generated by production, industrial and consumer activities. Information obtained from this study has been organised into two data bases. Data base 1 contains the “General Characteristics” file of more than 105 materials. In this file, data are available regarding generation points, material availability, uses, cost, disposal expenses, etc. Data base 2 is comprised of the “Specific Properties” file of 63 materials selected from data base 1. The main physical, chemical and biological properties of these materials as container media have been characterised, and the results obtained have been compiled. Finally, a computerised data bank has been created which can be found in the home page of the Spanish Ministry of Agriculture, Fisheries and Food (http://agritel2.mapya.es/sustratos/).
    Bioresource Technology 05/2001; 77(2-77):197-200. DOI:10.1016/S0960-8524(00)00152-8 · 5.04 Impact Factor
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    ABSTRACT: Several experiments were conducted with the objective to find suitable alternatives for peat substrates. Physical properties of wood fiber substrates in comparison to other organic substrates were examined. Volume weight, total pore space, pore size distribution, available water, container and air capacity, saturated hydraulic conductivity and volume loss of these substrates were determined. Wood fiber substrates showed a similar volume weight and total pore space as peat substrates, but lower water retention. Particularly the drainage performance of wood substrates results in a quick drainage of surplus water. An increase of volume weight caused a decrease of total pore space, air content and saturated hydraulic conductivity and an increase in water retention. Evaluation of these parameters under container conditions is critical since they are directly related to irrigation and therefore to plant growth. A compression of wood fiber substrates in the pots is recommended to minimize substrate loss. An increase of compression levels reduced the volume loss to almost 0 vol.%. The effect of wood fiber substrates and their volume weight on plant growth will be reported in a second paper.
    Scientia Horticulturae 03/2004; DOI:10.1016/j.scienta.2003.10.001 · 1.50 Impact Factor