Abstract

본 연구는 골분과 미강을 이용한 유기 액비 제조 시 건조효모와 당밀 첨가에 따른 액비의 무기성분 특성 변화를 구명하고 첨가 효과를 평가하고자 수행하였다. 액비 제조시 건조효모의 첨가 효과는 무첨가구에 비해 pH의 변화가 적고, EC의 증가폭이 컸으며 EC 값도 높게 나타났다. 또한 <TEX>$NH_4$</TEX>-N농도는 건조효모 첨가구가 <TEX>$2,936mg{\cdot}L^{-1}$</TEX>로 무첨가구의 <TEX>$1,782mg{\cdot}L^{-1}$</TEX>에 비해 높았다. 당밀 첨가 효과는 첨가구가 무첨가구에 비해 pH가 낮은 경향을 보였으며 EC는 당밀 무첨가구에서 다소 높은 것으로 나타났다.<TEX>$NH_4$</TEX>-N농도는 당밀 무첨가구가 <TEX>$2,936mg{\cdot}L^{-1}$</TEX>로 첨가구의 <TEX>$2,378mg{\cdot}L^{-1}$</TEX>에 비해 높았다. 따라서 액비 제조 시 건조효모 첨가는 유기물원의 분해를 촉진하여 식물이 이용할 수 있는 질소형태로 무기화를 촉진시키고, 당밀 첨가는 유기물의 분해를 억제하지만 발효 성상을 향상시키는 효과를 보였다. 또한 액비처리에 의한 부추생육을 조사한 결과, 양분공급에 의한 생육 증가 효과를 나타내었다. Objective of this study was to investigate characteristics of inorganic components contained in liquid fertilizer produced using bone powder and rice bran by adding dry yeast and molasses. Addition of dry yeast to liquid fertilizer resulted in little change in pH, considerable increase in EC, and it showed high EC value compared to the control which has no additives. Also, it was appeared that the dry yeast-added treatment had higher at <TEX>$2,936mg{\cdot}L^{-1}$</TEX> of <TEX>$NH_4$</TEX>-N concentration than the control which had <TEX>$1,782mg{\cdot}L^{-1}$</TEX>. In the other hand, addition of molasses resulted in low pH and slightly low EC, as compared to the control. <TEX>$NH_4$</TEX>-N concentration in the no added molasses treatment was <TEX>$2,936mg{\cdot}L^{-1}$</TEX> higher than its molasses added treatment which had <TEX>$2,378mg{\cdot}L^{-1}$</TEX>. In conclusion, it was shown that addition of dry yeast to liquid fertilizer increased ammonium nitrogen concentration by accelerating nitrogen mineralization, while molasses has an effect of inhibiting nitrogen mineralization and enhancing the characteristics of fermentation. With application of organic liquid fertilizer containing bone powder and rice bran increased the fresh weight of Allium tuberosum.

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