제지슬러지의 시용이 (施用) 논 토양의 화학성과 수도생육에 미치는 영향 - Ⅲ. 슬러지시용이 (施用) 수도생육에 미치는 영향 - = Originals : Effects of Paper Sludge Application on the Chemical Properties of Paddy Soil and Growth of Paddy Rice - Ⅲ. Effects of Paper Sludge Application in the Growth oh Paddy Rice

다국어 초록 (Multilingual Abstract)

To investigate the effects of paper sludge on the growth response of paddy rice, paper sludge was applied to pots at the rate of either 300, 600, 900 or 1,200 ㎏/l0a which was either preadjusted at a C/N ratio of 30 : 1 or not adjusted. The effects were compared with those of the control. 1. Plant heights, number of tillers and dry weight were significantly reduced with the increasing application of paper sludge in the early stages of rice growth, whereas opposite results were observed after the heading stage when treated with C/N ratio preadjusted paper sludge. 2. The uptake of N, P₂O_5, K₂O and SiO₂ by rice plants grown in paper sludge treated soil was significantly reduced in the early stages of rice growth. Conversely, uptake was enhanced in the C/N ratio preadjusted plot in the young panicle formation stage. 3. Zn, Cu and Cd content in rice straw was in the range of 39∼101, 0∼0.11 and 0.03∼0.14ppm, respectively, and Pb and Cr in rice straw were not detected at all. However, there was no difference in the content of all these heavy metals in rice straw irrespective of treatment.