Comparison of Characteristics of a Paddy Soil and Growth and Production of Rice as Affected by Organic Nutrient Sources
2011
Kim, H.W., Jeollanam-do Agricultural Research and Extension Service, Naju, Republic of Korea | Choi, H.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, B.H., Jeollanam-do Agricultural Research and Extension Service, Naju, Republic of Korea | Kim, H.J., Jeollanam-do Agricultural Research and Extension Service, Naju, Republic of Korea | Choi, K.J., Jeollanam-do Agricultural Research and Extension Service, Naju, Republic of Korea | Chung, D.Y., Chungnam National University, Daejeon, Republic of Korea | Lee, Y., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Park, K.L., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
The study was conducted to evaluate the effects of organic materials commonly used for rice culture on the soil chemical properties and yield and quality of rice. Treatments were applied on the surface layer after rice planting and included: A) Kumsugangsangold, commonly used as a nutrient source for organic rice culture in Chonnam province (compost Ⅰ), B) Rice bran, containing large quantities of vegetable ingredient (compost Ⅱ), C) Chamdalkom, manufacturing by-product fish (compost Ⅲ), and D) Hangawi, mixing anmimal and vegetable ingredients (compost Ⅳ). Seasonal N-mineralization rate was faster on the compost Ⅰ and Ⅲ with lower C:N ratio than those of the compost Ⅱ and Ⅳ. Soil chemiceal properties were not significantly affected by treatments. Seasonal organic matter was higher on the compost Ⅱ and Ⅳ with high input of the organic materials than those of compost Ⅰ and Ⅲ, which would affect the level of biomass C. Higher rice yield treated by compost Ⅰ was observed in year 1, but no significant difference was observed in years 2 and 3.
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