Effect on rice [Oryza sativa] growth of the different application of liquid phase of digested organic waste
2009
Zenmyo, T.(Kyushu Univ., Fukuoka (Japan)) | Yamakawa, T. | Kikuchi, M.
The nutritive effect on rice (Oryza sativa. 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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