Mr Yang-yeol Oh1, Dr Jin-Hee RYU1, Mr Su-Hwan Lee1, Mr Jae-Won Jeong1, Dr Jung-Tae Lee1
1National Institute Of Crop Science,rda, Wanju-gun, South Korea
Reclaimed land requires organic matter management because there is only one-tenth organic matter content compared with conventional soil. Common reed (Phragmites communis Trin.) is widespread at reclaimed land in Korea. Because common reed has high biomass, it has potential as a source of organic matter in reclaimed land.
The objective of this study was to evaluate characteristics of common reed decay by incorporation in reclaimed land soil. Common reed was exposed in mesh bags (25 x 30cm) at five sites (low salinity topsoil, subsoil, high salinity topsoil, subsoil, paddy topsoil) during 70 days. After 70 days, common reed has lost 11~30% of original dry weight, depending on salinity level and soil depth. Nutrient concentrations (C, N, P, K, Ca, Mg, Na) increased subsequently until the end of the study period. Low salinity topsoi treatments the lowest C/N ratio during 70 days. Our results suggest that it is necessary to observe the correlation common reed decay rate and soil organic matter content
I am a member of the National Institute of Crop Science , RDA in Korea. I am studying on improving the soil and cultivating crops in reclaimed land in Korea.