Abstract
The study was carried out to develop nursery soil for rice seedling of phyllite. First of all, physico-chemical properties of used phyllite in the study through the analysis for agricultural utilization evaluation are as following. Bulk density(BD) of phyllite was $1.31g/cm^3$ each other and porosity had 65% of entire pore size. Also, the water holding capacity(WHC) was 43% at 1/3bar pressure, which phyllite has high WHC. According to, the results the experiments for nursery soil were conducted by mixing the materials such as phyllite, zeolite and hill soil. The mixing ratios were 30, 50, and 70% for zeolite and hill soil into phyllite. These mixed materials were packed in a box by adding 0, 1 and 2g of N-fertilizer. At seedling test, there were increases in the growth of shoot and root of rice for phyllite to zeolite and phyllite to hill soil, respectively. On the other hand, the length of leaf increased with increasing application rate of phyllite, while length and a number of root increased with increasing application rate of hill soil. The growth in the plots of phyllite to zeolite and phyllite to hill soil was better than in control plot. Finally, phyllite plot had efficient results when it compared with others and the study used with phyllite will have to more research and effort for agricultural useful material.
본 연구는 phyllite의 수도 육묘용 상토개발을 위해 수행되었다. 먼저 phyllite의 물리화학적인 조사를 통하여 phyllite의 농업적 이용성을 평가하기 위해 수행한 실험 결과, Phyllite 용적비중은 각각 $1.31g/cm^3$이며, 결정 입자들 사이에는 전체의 65% 공극을 가지며, 이러한 성질에 의해 수분을 흡수할 수 있는 표면적이 넓어지므로 수분보유력은 43%(1/3bar)이다. 수도 육묘 상토 개발을 위해 phyllite에 zeolite와 hill soil 각각을 100%, 70%, 50%와 30%로 혼합하고, 질소 시비량(0, 1, 2g/box)을 달리한 육묘 시험에서 벼의 육묘 초기에 phyllite를 zeolite와 혼합할 경우 phyllite 함량이 증가할수록 초장 및 묘 충실도의 증가에 영향을 주며 뿌리의 생육에는 영향을 주지 않았다. 그러나 hill soil과 혼합할 경우, phyllite 함량이 증가할수록 발근율을 증가시키며 초장의 생장에는 영향을 주지 않았다. 단, 벼의 생육에 있어서 육묘 일수가 길어질수록 질소질 비료의 시비는 벼의 생육을 촉진시켰다. 따라서 phyllite는 현재 육묘 상토자재들과 비교하여 양호한 결과를 나타내었으며 앞으로도 좀 더 다양한 농업적 자재로서의 활용연구가 이루어져야 할 것이다.