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강미영,김주희,허규홍,조선식,Manuel Q. Esguerra,손태권,이상철 한국작물학회 2008 한국작물학회지 Vol.53 No.S
Effect of rice bran applied alone or in combination with chemical fertilizer on growth and edible quality of rice was investigated. The experiment consisted of 11 treatments: 3 levels of rice bran (RB) (500, 250 and 100 kg 10a-¹), 100 and 50% recommended fertilizer (RF) combined with above-mentioned 3 levels of RB, and 100 and 50% RF only. The rice brans were applied at 10 days before rice transplanting. Results showed that plant height 30 days after transplanting was significantly higher at 100% RF treatment than the RB treatments. However, plant height during heading stage was not significantly different between the 100% RF and the RB treatments. At higher RB treatments, ripened grain decreased, while panicle number and plant height increased. In the case of rice yield, 50% RF + RB treatments exhibited similar or slightly higher yield than 100% RF. These results suggested that the recommended fertilizer can be reduced by 50% in case of applying RB. In terms of nutritional quality, protein content on rice grain increased at higher RB treatment, while amylose content at 50% RF + RB treatments (17.3~17.8%) decreased compared to that of RF (17.9~18.1%). Results showed significant effects of RB application on rice growth and quality. Effect of rice bran applied alone or in combination with chemical fertilizer on growth and edible quality of rice was investigated. The experiment consisted of 11 treatments: 3 levels of rice bran (RB) (500, 250 and 100 kg 10a-¹), 100 and 50% recommended fertilizer (RF) combined with above-mentioned 3 levels of RB, and 100 and 50% RF only. The rice brans were applied at 10 days before rice transplanting. Results showed that plant height 30 days after transplanting was significantly higher at 100% RF treatment than the RB treatments. However, plant height during heading stage was not significantly different between the 100% RF and the RB treatments. At higher RB treatments, ripened grain decreased, while panicle number and plant height increased. In the case of rice yield, 50% RF + RB treatments exhibited similar or slightly higher yield than 100% RF. These results suggested that the recommended fertilizer can be reduced by 50% in case of applying RB. In terms of nutritional quality, protein content on rice grain increased at higher RB treatment, while amylose content at 50% RF + RB treatments (17.3~17.8%) decreased compared to that of RF (17.9~18.1%). Results showed significant effects of RB application on rice growth and quality.
강미영,Joo Hee Kim,Kyu Hong Heo,Sun Shik Cho,Manuel Q. Esguerra,Cyren M. Rico,Tae Kwon Son,이상철 한국작물학회 2008 한국작물학회지 Vol.53 No.S
The effect of rice bran (RB) applied alone or in combination with chemical fertilizer at different application rate on the phytochemical and antioxidant properties of rice was investigated. The treatments were 3 levels of RB namely: 200% RB (500 kg 10a-¹), 100% RB (250 kg 10a-¹), 50% RB (125 kg 10a-¹), Recommended fertilizer dose (RF: N-P₂O5-K₂O, 11-5.5-4.8 kg 10a-¹) combined with each RB, Half-recommended fertilizer dose (HRF: N-P₂O5-K₂O, 5.5-2.75-2.4 kg 10a-¹) combined with each RB, RF and HRF applied at 1, 5, 10 days before rice transplanting (DBT). The parameters investigated were antioxidant, phytosterol and fatty acid contents. Results showed that the antioxidant property and phytosterol contents were high at 10 DBT HRF plus RB, 5 DBT RF plus RB, and 1 DBT 100 and 200% RB. However, total polyphenols increased from 10 to 1 DBT. In the case of fatty acids, no general trend was observed between treatments at different application times. Linoleic acid was high at 10 DBT HRF plus RB while linolenic acid was not affected at different application times. Palmitoeic and oleic acids were not also affected at 5 and 10 DBT. Saturated fatty acids were not also affected by any treatment at different application times except for palmitic acid. Most parameters obtained higher values at 100 and 200% RB treatments in 1 DBT.