다공성규산칼슘계 화합물을 이용한 원예용 상토개발에 관한 연구

Study on Development of Horticultural Media Using Macroporous Calcium-Silicate Mineral

본 연구는 다공성규산칼숨계화합물(CellCaSi) 의 토양개량제 및 원예용상토 원료로서의 평가와 농업적 효용가능성에 대하여 검토되었다. 다양한 입자크기인 1~3.35mm 범위로 구성된 CellCaSi의 용적밀도는 약 $0.42g/cm^3$였다. 또한 최대공극은 81.4%로 나타났다. 원예용 상토에 CellCaSi의 적정혼합비를 구하기 위하여 배추, 상추의 발아율(Germination Index; G.I)을 조사하였으며, CellCaSi가 10% 첨가된 상토의 G.I.가 배추와 상추에서 각각 94.1%, 64.6%로 가장 높은 결과를 얻었다. 그리고 배추, 상추의 작물생육조사에서는 공시작물의 생중량을 비교할 때 CellCaSi의 첨가비율이 10%와 20%에서 가장 우위를 나타냈다. CellCaSi의 흡착능 실험에서는 화학비료를 N : P : K = 18 : 18 : 18의 비로 처리하였으며, N. P. K의 처리된 성분이 증가할수록 CellCaSi에 흡착된 양도 증가하는 경향이 나타났다. 배추와 상추의 작물생육조건에서 가장 적절한 처리는 Fer-1, 그리고 Fer-05였다.

The experiment was conducted to investigate the agricultural utility of macro-porous calcium-silicate rnineral(CellCaSi) as topsoil mixture, as well as to estimate as a soil conditioner. The bulk density of CellCaSi which is consisted of various particle sizes ranging from 1mm to 3.35mm was about $0.42g/cm^3$, and its maximum porosity was approximately 81.4%. We also investigate gerrnination rates for Cabbage and Lettuce to obtain the suitable mixing ratios of CellCaSi with topsoil. Among 4 different mixing ratios, the germination rates of ropsoil mixed with 10% of CellCaSi were 94.1% and 64.6% for Cabbage and Lettuce, respectively resulted in the mosr suitable for germination. The growth rates for Cabbage and Lettuce showed thar 10% and 20% of CellCaSi treatments signification influenced the fresh weight. To observe the adsorption capacity of CellCaSi, CellCaSi was treated with a chemical fertlizer(N:P:K=18:18:18). lncreasing the contents of N, P and K, the amounts of adsorption by CellCaSi for these element also increased. The most suitable types nutrient resources for growth condition of Cabbage, and Lettuce were Fer-1 and Fer-0.5.