ISHS Acta Horticulturae 150: International Symposium on Substrates in Horticulture other than Soils In Situ
SUBSTRATES WITH SLOW RELEASE NITROGEN AND POTASSIUM ORGANIC FERTILIZERS |
| Authors: | O. Nowosielski, H. Struszczyk, A. Beresniewicz |
| Abstract:
In the approach to the problem of correlation between fertilizer action and nutrients requirment are observed several trends /Dankiewicz J., Dudek K. 1978; Krysztalkiewicz A., Maik M. 1981/ among others the modification of fertilizers, applications of the nitrification inhibitors, encapsulation of fertilizers by water resistant or water non-disolving materials as well as the elaboration of the new fertilizers types with controlled, slowly released components. A new tendency for the slow release fertilizers is concerned with application of the organic substrates as carriers for N,K components /Polish Patent, 1980; Appl. Polish Patent, 1983/. A base of these fertilizers is the use as carriers the natural polymeric materials containing especially cellulose and lignins for example peat, bark, brown coal or cellulosic pulp. The properties and structure of above polymers/Kydonieus A.F. ed.1980; Stone J.E., Scallan A.M; 1968/ are adequate for inclusion of nutrient components and their slow release from carriers later. The natural polymers form adequate physico-chemical and/or chemical bonds for intercalated components and also additionally used controlling polymeric films are responsible for the controlled slow release action of these fertilizers /Polish Patent, 1980/. This report is a part of studies concerned with the development of slow release N, K fertilizers on organic carriers base and with their application in horticulture. | |
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