Effects of continuous application of poultry manure compost on paddy rice [Oryza sativa] in wet paddy field
2008
Kanemoto, T.(Hiroshima-ken. Technology Research Inst., Higashihiroshima (Japan). Agricultural Technology Research Center) | Tanimoto, T. | Kimura, J.
Poultry manure composts have been applied to paddy rice for six years in the wet paddy field as basal dressing without rice straw application. We investigated changes in the chemical property of topsoil (0-15cm). The fertilizing efficiency rate of poultry manure composts was calculated with 76% in the wet paddy field. Used poultry manure compost 200kg/10a and topdressing at panicle formation stage (compound fertilizer) for paddy-rice, and cultivated it; when did it, was able to get an approximately equal yield, quality when used only compound fertilizer. In the wet paddy field, 200kg/10a used poultry manure compost every year for six years. As a result, total nitrogen (fertility of soil) of the topsoil did not increase. The available phosphoric acid of the topsoil, the exchangeable calcium slightly increased. The soil pH went up. However, the chemistry of the topsoil of every single year-related change does not influence inorganic ingredient content of the paddy-rice small. In addition, the heavy metal such as the zinc does not accumulate it to the topsoil.
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