ISHS Acta Horticulturae 450: International Symposium Growing Media and Plant Nutrition in Horticulture
THE PROBLEM OF THE BIOSTABILITY IN ORGANIC SUBSTRATES |
| Author: | F. Lemaire |
| Keywords: | organic substrate, biostability index, raw coir, pine bark compost, sphagnum peat, ligno-cellulosic fiber, yard compost, flax waste |
| Abstract:
Actually, many organic products coming from industrial, agricultural and human activities are produced in large quantities. They could be used as components of substrates if their physical and chemical properties are good at the start of growing and if they keep them during the culture. Consequences of a lack of biostability may be important for the plants because of the change of the properties. A technique for biostability evaluation : decomposition rate according to the time is proposed and has been used for different organic products : agricultural waste, yard compost, pine bark compost, sphagnum peat and ligno-cellulosic fibers. Other predicting methods : C/N ratio, biochemical stability index (ISB) and respirometric have been used. The obtained biostability index is only compared with data given by the two first methods. | |
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