九州大学大学院農学研究院植物資源科学部門植物生産科学講座植物栄養学研究室
Laboratory of Plant Nutrition, Department of Plant Resource Science, Graguate School of Bioresource and Bioenvironmental Science, Kyushu University
九州大学大学院農学研究院植物資源科学部門植物生産科学講座植物栄養学研究室
Laboratory of Plant Nutrition, Department of Plant Resource Science, Graguate School of Bioresource and Bioenvironmental Science, Kyushu University
九州大学大学院農学研究院植物資源科学部門植物生産科学講座植物栄養学研究室
Laboratory of Plant Nutrition, Department of Plant Resource Science, Graguate School of Bioresource and Bioenvironmental Science, Kyushu University
The nutritive effect on rice （Oryza satiua，L）growth of two different application of liquid phase of digested organic waste （LPD）was investigated.This study was carried out with a pot experiment in 2005.This LPD was applied on the surface or incorporated into the upper layer of soil.Surface application of LPD decreased tiller number and shoot dry weight.However，there was no significant difference in ear dry weight.The gross recovery rate of applied nitrogen from surface application of LPD was less than that from incorporation of LPD and chemical fertilizer.So the dry matter production efficiency per applied nitrogen was low by surface application of LPD.This suggests that ammonium nitrogen in LPD might be lost through volatilization by the surface application， because LPD was alkaline.From the results， it is concluded that the nutritive effect of LPD is equal to chemical fertilizer when it is incorporated into the soil.
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