Effects of Organic Waste Substrates on the Growth of Impatiens
The use of peat and peat substitute organic wastes as substrates for container-grown flowers was studied. Peat, hazelnut husk, and maize straw were considered as support materials and MSWC (municipal solid waste compost) and poultry manure as fertilizer supplements. Eight substrates were prepared by combining each additive with peat, hazelnut husk, and maize straw. Hazelnut husk and maize straw substitution by 50% and compost and poultry manure addition by 25% in peat exhibited acceptable physical and chemical properties that are important for container substrates. Nitrogen provided by the compost and poultry manure influenced plant growth and flowering. The lowest rate of plant growth was obtained with commercial peat, while the highest was obtained with peat+maize straw+poultry manure. The presence of compost in the substrate produced fewer flowers per plant even though the plants had a similar vegetative frame, and fresh and dry mass. Higher electrical conductivity (EC) of the substrate and lower nitrogen content in peat+MSWC and peat+hazelnut husk+MSWC reduced the number of flowers per plant more than the control did. On the other hand, plants in commercial peat flowered abundantly at the beginning of season, while plants in the substrate with MSWC and poultry manure added flowered 1 or 2 weeks later and had a longer abundant flowering period. Our results suggest that it is possible to use organic materials, such as those we tested, as an alternative growing media component to peat.
Effects of Organic Waste Substrates on the Growth of Impatiens
The use of peat and peat substitute organic wastes as substrates for container-grown flowers was studied. Peat, hazelnut husk, and maize straw were considered as support materials and MSWC (municipal solid waste compost) and poultry manure as fertilizer supplements. Eight substrates were prepared by combining each additive with peat, hazelnut husk, and maize straw. Hazelnut husk and maize straw substitution by 50% and compost and poultry manure addition by 25% in peat exhibited acceptable physical and chemical properties that are important for container substrates. Nitrogen provided by the compost and poultry manure influenced plant growth and flowering. The lowest rate of plant growth was obtained with commercial peat, while the highest was obtained with peat+maize straw+poultry manure. The presence of compost in the substrate produced fewer flowers per plant even though the plants had a similar vegetative frame, and fresh and dry mass. Higher electrical conductivity (EC) of the substrate and lower nitrogen content in peat+MSWC and peat+hazelnut husk+MSWC reduced the number of flowers per plant more than the control did. On the other hand, plants in commercial peat flowered abundantly at the beginning of season, while plants in the substrate with MSWC and poultry manure added flowered 1 or 2 weeks later and had a longer abundant flowering period. Our results suggest that it is possible to use organic materials, such as those we tested, as an alternative growing media component to peat.
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- Abad, M., P. Noguear and S. Bures. 2001. National inventory of organic wastes for use as growing media for ornamental potted plant production: case study in Spain. Bioresource Tech. 77: 197-200.
- Adegbidi, H.G. and Briggs, R.D., 2003. Nitrogen mineralization of sewage sludge and composted poultry manure applied to willow in a greenhouse experiment. Biomass and Bioenergy. 25: 665- 673.
- Bernai, M.P., Paredes, C., Sanchez-Monedero, M.A. and Cegarra, J., 1998. Maturity and stability parameters of composts prepared with a wide range of organic wastes. Bioresource Tech. 63: 91- 99.
- Bunt, A.C. 1988. Media and mixes for container grown plants: A manual on the preparation and use of growing media for growing pot plants. (2nd Ed.), Unwin Hyman Ltd., London.
- Çaycı, G., I. Unver, Y. Ataman, and N. Munsuz. 1989. Distribution and horticultural values of the peats in Anatolia. Acta Hort. 238: 189- 196.
- Eklind, Y., L. Salomonsson, M. Wivstad and B. Ramert.1998. Use of herbace compost as horticultural substrate and source of plant nutrients. Biol. Agric. Hortic. 16: 269-290.
- Garcia-Gomez, A., M.P. Bernal, and A. Roig. 2002. Growth of ornamental plants in two composts prepared from agroindustrial wastes. Bioresource Tech. 83: 81-87.
- Guerrero, F., J.M. Gasco and L. Hernandez-Apaolaza. 2002. Use of pine bark and sewage sludge compost as components of substrates for Pinus pinea and Cupressus arizonica production. J. Plant Nutr. 25: 129-141.
- Ingelmo, F., R. Canet, M.A. Ibanez, F. Pomares and J. Garcia, J. 1998. Use of MSW compost, dried sewage sludge and other wastes as partial substitutes for peat and soil. Bioresource Tech. 63: 123- 129.
- Lang, H.J. and T.R. Pannkuk. 1998. Effects of fertilizer concentration and minimum-leach drip irrigation on the growth of New Guinea impatiens. HortScience. 33: 683-688.
- Kuehny, J.S. and B. Morales. 1998. Effects of salinity and alkalinity on pansy and impatiens in three different growing media. J. Plant Nutr. 21: 1011-1023.
- Marfa, O., F. Lemaire, R. Caceres, F. Giuffrida and V. Guerin. 2002. Relationship between growing media fertility, percolate composition and fertigation strategy in peat-substitute substrates used for growing ornamental shrubs. Scientia Hort. 94: 309- 321.
- Ozdemir, S., O.H. Dede and G. Koseoglu. 2004. Recycling of MSW compost and sewage sludge as growing substrate for ornamental potted plants. Fresenius Env. Bul. 13: 30-33.
- Riberio, H.M., E. Vasconcelos and J.Q. Santos. 2002. Fertilisation of potted geranium with a municipal solid waste compost. Bioresource Tech. 73: 247-249.
- Van Iersel, M.W., R.B. Beverly, P.A. Thomas, J.G. Latimer and H.A. Mills. 1998. Fertilizer effects on the growth of impatiens, petunia, salvia, and vinca plug seedlings. HortScience 33: 678- 682.
- Verdonck, O. and R. Gabriels. 1992. Reference method for the determination of physical and chemical properties of plant substrates. Acta Hort. 302: 169-179.
- Wilson, S.B., P.J. Stoffella and D.A. Graetz. 2002. Development of compost-based media for containerised perennials. Scientia Hort. 93: 311-320.