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Tuesday, 11 October 2016
Physico-chemical and chemical properties of some coconut coir dusts for use as a peat substitute for containerised ornamental plants
Published Date May 2002, Vol.82(3):241–245,doi:10.1016/S0960-8524(01)00189-4
Manuel Abad a,,
Patricia Noguera b
Rosa Puchades b
Angel Maquieira b
Vicente Noguera a
aDepartamento de Producción Vegetal, Universidad Politécnica de Valencia, P.O. Box 22012, E-46071 Valencia, Spain
bDepartamento de Quı́mica, Universidad Politécnica de Valencia, P.O. Box 22012, E-46071 Valencia, Spain
Received 28 March 2001. Revised 7 October 2001. Accepted 9 October 2001. Available online 6 November 2001.
Selected physico-chemical and chemical characteristics of 13 coconut coir dust (mesocarp pithy tissue plus short-length fibres) samples from Asia, America and Africa were evaluated as peat alternatives. All properties studied differed significantly between and within sources, and from the controlSphagnumpeat. pH of coir dust was slightly acidic, whereas salinity varied dramatically between 39 and 597 mS m−1in the saturated media extract. The cation exchange capacity and carbon/nitrogen (C/N) ratio ranged from 31.7 to 95.4and from 75 to 186, respectively. Most carbon was found as lignin and cellulose. The concentrations of available nitrogen, calcium, magnesium and micro-elements were low, while those of phosphorus and potassium were remarkably high (0.28–2.81 mol m−3and 2.97–52.66 mol m−3for P and K, respectively). Saline ion concentrations, especially chloride and sodium, were also high.