EKO AMIADJI, JULIANTO (2004) SIFAT KIMIA BAHAN ORGANIK YANG BERPENGARUH PADA PELEPASAN NITROGEN DALAM REGOSOL. JURNAL TANAH DAN AIR (SOIL AND WATER JOURNAL), 5 (2). pp. 105-116. ISSN 1411-5719
Abstract
Organic material is known to be very important nitrogen source for crop plants. Agricultural technology based on the used in organic material slowly tends to change to a more rational organic technology, which involve local resource. Nitrogen release from organic material is governed by three factor i.e. : lignin content, C/Natio and polyphenol content. The objectives were to find out the effect of kinds of organic material on the release of nitrogen and to find out chemical caracteritics of organic material influencing the release of nitrogen. The Study was carried in the green house, and in the Laboratory of Soil Chemostry and Fertility Departmnt of Soil Science, Faculty of Agriculture Gadjah Mada University.The experiment was conducted as as a pot trial with consisting variable of organic material application. There were seven levels. Each treatment consisted of tree replication. The result of this study showed that addition of the glucose to organic material tends to decrease the soil C/N ratio. The C/N ratio of the organic material had a distinct pattern in suppressing nitrogen release; however it was not in the polyphenol content of the organic material. It was suggested that the suppression of the nitrogen release to be related to the kind of polyphenol in the material Key words : organic material, polyphenol, C/N ratio
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