Changes in Carbon Amount of Soil and Rice Plant as Influenced by the Cultivation of Different Green Manure Crops
2012
Cho, H.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Seong, K.Y., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Park, T.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Seo, M.C., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Jeon, W.T., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Yang, W.H., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kang, H.W., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Lee, H.J., National Institute of Crop Science, RDA, Suwon, Republic of Korea
A green manure crop were used in many ways, such as for reducing chemical fertilizer, improving physical and chemical properties of soils, protecting soil loss, and creating landscape when it's grown in agricultural land. Experiments were conducted to find out carbon emitted with applying green manure crops in paddy field. Amounts of carbon absorbed in the green manure crops during the winter were 1.22 ton ha-¹ in hairy vetch, 1,24 ton ha-¹ in barley, and 1.54 ton ha-¹ in hairy vetch/barley. The soil carbon content was the highest at days before transplanting of rice and decreased after days after harvesting the plant. Soil carbon contents were higher with hairy vetch or barley treatment than with hairy vetch/barley treatment. The content of emitted methane (CH₄) was the highest at 7 days after transplanting rice plant, and was 17 ~ 25 times higher with green manure treatments than with chemical fertilizer application. The CH₄ emission was the highest with hairy vetch treatment and than followed by hairy vetch/barley and barley treatments. The content of carbon absorbed in rice plant increased during the cultivation period but was not different with the applications of different green manure crops. The yield amounts of rough rice and rice strow were 5 ~ 13% higher with the green manure treatments than the chemical fertilizer application. In particular, they were the highest with hairy vetch/barley treatment as 14.07 ton ha-¹.
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