이앙전작 청예작물 재배에 관한 연구 2 . 수도전 청예옥수수의 예취 시기가 초장 , 수량 , 일반조성분 및 토양의 pH , 유기질 함량에 미치는 영향 = Studies on the Cultivation of Soiling Crops before Transplanting Rice 2 . Effect of the cutting stage before transplanting rice on the grass height , yield , chemical composition of soiling corn and on the pH and organic matter content of soi

다국어 초록 (Multilingual Abstract)

To investigate the reasonable utilization method of paddy field in southern district ,this experiment was carried out to detect the effect of cutting stage on the grass height, yield and chemical composition of green crop cultivated in the paddy field which was idle and on the pH and organic matter of Soil. The results obtained were as follows. 1. Grass height of yellow corn cut on June 20 was 231.29㎝ on the green basis and highest among the treatments. Grass height of yellow corn cut on June 1 was 174.77㎝ on the green basis and shortest among the treatments. In the cutting stage, significant differences were found out between treatments (P$lt;0.05). However there were no difference between grass height of yellow corn cut on June 15 and June 20 on the green basis. 2. In the ratio of leaf to stem, leaf was generally higher than stem. However treatments cut on June 1 and June 20 have slightly less leaf than treatments cut on other cutting stage. 3. In the green yield, treatment cut on June 20 produced the highest yield (8969.33㎏ per l0a) among treatments. Treatment cut on June 1 produced the lowest yield(7296.67㎏ per l0a)among treatments. There were significant, differences (P$lt;0.05) between cutting stages in the green yield. Yield was increased as the cutting stage was late. 4. In the dry matter yield, treatment cut on June 1 produced the lowest yield(796.08㎏) and treatment cut on June 20 produced the highest yield among treatments. Dry matter yield was generally increased as the growth stage progressed. 5. In the chemical composition, treatment cut early was high in crude protein content and low in crude fiber content of soiling corn. However crude fiber content of soiling corn was increased as the growth stage progressed.. 6. pH of soil was higher in the field fertilized after than in the field fertilized before. pH of soil was progressively decreased as the cutting stage was prolonged and was lower than that of soil fertilized before. 7. In the organic matter content of soil, treatments cut on June 5 and June 10 were lower in organic matter content than before fertilization. Other treatments were similar to organic content of soil fertilized before. Therefore according to this experiment, it may be concluded that there were no influences on the cultivation of rice when soiling crop (corn) was cultivated in the paddy field before transplanting rice.