Acknowledgement
Supported by : 한국수자원공사
Effect of water treatment sludge(alum sludge) application on the growth of Korea local corn(Zeas Mays L.) was evaluated and phytotoxicity of alum sludge on the growth of corn roots and plant height was tested. Alum sludge itself and composted alum sludge compost were applicated by 1500kg/ha in the plot respectively. For the fertility test, yield, chlorophyll content, plant height of corn treated by alum sludge and composted alum sludge were better than that of control. No clear toxixity of alum sludge was found. At the food chemical analyses of seed corn, no obvious component variation were evaluated either. Test of pH effect on phytotoxicity of alum sludge on corns showed that plant height and root growth of corns were inhibited at low pH 4 solution. Phytotoxicity test of alum sludge extract which was extracted at various pH solutions, showed that growth and cations uptake inhibition were found the more serious the lower the pH. Plant height and root growth injury were serious at higher than 100ppm Al content solution.
본 실험은 옥수수에 대한 정수장 슬러지 (Alum 슬러지)의 시용효과와 다양한 pH별로 용출된 alum슬러지 추출물이 옥수수의 유식물 생육에 미치는 영향을 평가하기 위해서 수행되었다. Alum슬러지와 부숙된 Alum슬러지 퇴비를 각각 1500kg/ha를 시용하여 옥수수를 재배한 결과 수량, 엽록소함량, 초장 등의 평가에서 대조구에 비해서 비효가 인정되었으며, 뚜렷한 비해 현상은 나타나지 않았다. 처리구별 옥수수의 종실에 대한 식품화학적 분석에서도 뚜렷한 성분 변화는 발견되지 않았다. pH에 대한 옥수수 유식물의 생육은 pH4 미만에서 지상부와 지하부의 생육저해가 나타났으며 무기이온의 흡수는 pH4 이하에서 크게 장해를 받는것으로 나타났다. 반면 alum슬러지의 추출물에서는 pH가 낮아지면서 지속적인 생육저해와 양이온 흡수저해가 나타났다. 또한 Aluminum함량이 100ppm 이하에서 극심한 생육저해가 나타났다.
Supported by : 한국수자원공사