벼 생육, 수량과 품질에 대한 돈분액비와 화학비료 시용 효과
Effect of Liquid Pig Manure and Synthetic Fertilizer on Rice Growth, Yield, and Quality
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가축분뇨 돈분액비를 벼 재배에 이용하는 방안을 모색하기 위해서 돈분 액비에 대하여 발효단계별로 완숙된 액비를이용하여 벼 재배 시험을 2007년과 2008년에 전라북도농업기술원 시험답(전북통)에서 실시하였다. 돈분액비는 계단식발효조내에서 약 6개월 정도 발효시키면서 일반성분과 중금속함량의 변화를 조사하였고, 벼 재배시험은 남평벼를 육묘하여 5월 22일에 재식거리 30 x 14 cm로 기계 이앙하였다. 분시비율은 기비 70%, 수비 30%로 하여 화학비료와 비교시험 하였다. 돈분액비의 부숙단계별 성분함량 변화를 보면 총질소는0.549%～0.122%로 부숙이 진행될수록 낮아졌으며, 인산, 나트륨 및 중금속 함량도 발효가 진행될 수록 낮아졌다. 농가에서 일반적으로 사용되고 있는 돈분액비 233종을 채취하여 조사한 결과 질소농도는 0.558%이고, C/N율은 3.116을 나타냈다. 질소농도의 최저값은 0.13%, 최고값은 0.99%로 큰 차이를 나타냈다. 벼의 질소흡수량은 액비와 화학비료 시용에따른 생육시기별 벼의 질소흡수량 변화는 액비시용은 최고분얼기에 20.3, 화학비료시용구는 22.2로 화학비료구에서 액비시용구보다 높은 흡수량을 나타냈다. 출수기의 질소농도는화학비료 처리구에서 1.5% 돈분액비 처리구에서 1.8%를 보여 차이가 크지 않았다. 수확기에 조사한 간장은 돈분액비 처리구에서 73.8 cm로화학비료 처리구에 비해 4.2 cm 짧았으며, 수장은 차이가 없었다. 수량은 돈분액비 처리구에서 507 kg/10a으로 화학비료 처리구에 비해 1.2% 낮은 수준을 보였다. 화학비료 처리구에서는 단백질 함량이 6.3%였으나, 돈분액비 시용구에서는 6.4% 로써 처리구 간에 차이를 나타내지 않았다. 그러나도복벼에서는 6.8%로 화학비료 처리구와 돈분액비 처리구중의 정상 벼보다 높게 나타냈다. 현미품위 중 완전미율은 화학비료 처리구에 비해서 돈분액비 처리구에서 낮은 경향이었으며, 백미품위, 식미값도 유사한 경향이었다. 이상의 결과에 의하면 돈분액비 시용은 숙성된 액비를 균일 살포 할 경우 관행적인 화학비료 시용에 상응하는 효과가있다고 생각된다.
Abstract
We have researched the changes in nutrient content in each phase of fermentation in crops treated with liquefied pig fertilizer, and have determined the best method for applying livestock excrement to cultured crops. In the execution of this experiment, rice was cultivated to full maturity at a paddy field in Jeollabuk-Do Agriculture Research and Extension Services(Jeon-buk series) from 2007 to 2008. The rice plant nitrogen absorption quantity change, according to the growth stages of the cultivated rice, was 20.3% in the rice treated with the liquid pig manure and 22.2% the chemical fertilizer at highest congelation. The chemical fertilizer showed a higher absorption quantity than the liquid manure compost. The nitrogen density at highest congelation was 1.5% in the chemical fertilizer, and 1.8% in the pig manure liquid compost not a significant difference. The stem height at harvest time was 73.8 cm in the crops treated with the liquid pig manure compost. Those treated with the chemical fertilizer, yielded a height of 4.2 cm less than the crops treated with the liquid pig manure compost. The yield was 507 kg/10a in the liquid pig manure compost treated rice, compared with the chemical fertilizer, which showed a value of 1.2% lower. The protein content was 6.3% in the rice treated with the chemical fertilizer, but 6.4% in the rice treated with the liquid pig manure compost. This is not a significant difference. However, the lodging rice plant treated with the chemical fertilizer control showed a protein content of 6.8%, which was even higher than the normal rice. The head rice ratio in the brown rice and the polished rice ended up to be lower in the crop treated with the liquid pig manure than that treated with the chemical fertilizer, Quality, the palatability value, was similar in both groups. The above result indicate that, the effect of liquid pig manure compost corresponds to the effect of chemical fertilizer, when each are scattered uniformly.
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