폐지섬유를 이용한 완효성 요소비료 시용이 벼의 생육, 수량 및 토양에 미치는 영향

Effects of Application of Slow-Released Nitrogen Fertilizer Using Waste Paper Slurry on the Growth and Yield of Rice and Chemical Properties of Soil

폐지섬유를 이용한 완효성 요소비료(시제품)의 벼에 대한 실용화 가능성을 검토하기 위하여 pot시험으로 무질소구, 요소구(대조구), 시제품구 처리에 벼(일미벼)를 공시하여 생육, 엽록소 함량 및 광합성능력, 수량 및 수량구성요소, 식물체중 무기성분 함량, 질소이용율 토양의 이화학성 등을 조사하였다. 초장과 분얼수는 생육초기에 시제품구가 요소구보다 다소 증가하였으나, 생육후기에는 비슷한 경향을 보였다. 이앙 후 40일의 엽록소 함량은 시제품구에서 요소구보다 다소 높았으나, 광합성능력은 요소구보다 낮았다. 수량 및 수량구성요소는 시제품구보와 요소구간에 통계적인 유의성은 없었으나, 시제품구가 요소구보다 다소 높았다. 수확기에 식물체중 전질소함량은 시제품구가 요소구보다 정조에서는 높았으나, 짚에서는 낮았다. 수확기의 질소흡수량은 시제품구가 요소구보다 정조에서 4% 높았으나, 짚에서는 20% 낮았으며, 질소이용율은 시제품구가 요소구보다 약간 낮았다. 시험 후 토양중 전질소 함량은 시제품구가 요소구보다 낮았다.

The aim of this study was to investigate the effects of slow-released nitrogen fertilizer(SRNF) on the growth and yield of rice. SRNF produced from wasted paper was applied to a clay loam paddy field comparing to urea fertilized field and only P-and K-fertilized field. Some agronomic components like as growth development and yield component were observed and physico-chemical properties of the soils were analyzed. Plant height and tiller numbers per hill showed higher in rice plant treated with SRNF than in one treated with urea at the early grow stage whereas they appeared to be all much the same at the end of growth stage. While the chlorophyll content in SRNF-treated rice shoot was higher than in urea-treated one, the photosynthetic activity in urea-treated rice shoot was slightly higher than in SRNF-treated rice. In harvested grain, the nitrogen content was higher than in SRNF treated rice than in urea treated rice, but in straws the content was less. At the harvesting stage, nitrogen uptake in grains was about 4% higher in SRNF-treated rice than in urea treated rice whereas in straws rather 20% lower. The N efficiency in SRNF treated rice was lower than in urea treated rice. In the soils treated with SRNF, pH, organic matter and phosphorus were higher than in the soils treated with urea. Total N content in SRNF treated soil was lower after experiment than in urea treated soil.