Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Changes in Soil Properties and Rice Production as Influenced by the Consecutive Application of Liquid Swine Manure in Paddy Field

돈분 액비의 연용이 벼의 수량과 토양에 미치는 영향

  • 류종원 (상지대학교 유기농생태학과)
  • Received : 2016.01.18
  • Accepted : 2016.02.26
  • Published : 2016.05.30
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Abstract

The application of animal manure on farm fields is one of the most economical ways. However, the continuous application of manure in paddy fields might change soil properties influencing the growth of rice plant. Thus, this study was conducted to investigate the changes in selected chemical and biological properties of soils and rice production as affected by the applications of two different fertilizer sources, which were the consecutive applications of liquid swine manure (LSM) and chemical fertilizer (CF), during the three experimental years, from 2012 to 2014. Application amount of LSM was based on 100% of nitrogen fertilizer recommendation rate for rice cultivation estimated by soil testing. Plant height and tiller number in rice at the first year of liquid swine manure manure plot were lower than those of chemical fertilizer plot. Height and tillers of rice in liquid swine manure plot were higher than those of rice in chemical fertilizer plot after consecutive application for 3 years. Rice yield In the first year of application was decreased by 7% than that of chemical fertilizer, but the yield of rice in the third year of application in LM 100% plot was increased by 8% compared to the chemical fertilizer. Toyo-taste value of milled rice in LM 100% was decreased by increasing of protein contents and decreasing rate of perfect grain. The K and Zn contents in the soil were increased in the plots of consecutive LSM application. The results implied that the liquid manure may neither decrease the yield of rice and nor increase soil properties except K and Zn in the soil, and decrease rice quality.

본 연구는 벼에 돈분액비와 화학비료를 연용하여 살포하였을 때 돈분액비가 벼의 수량과 미질 및 토양 화학성에 미치는 영향을 구명하고자 2012년부터 3년간 수행하였다. 시험은 강원도 철원군 농가 포장에서 오대벼를 공시하여 실시하였다. 시비는 돈분액비를 질소 검정시비량을 기준으로 하여 100%에 해당하는 양을 처리하였으며, 화학비료 처리구와 비교하였다. 돈분액비의 시용년수에 따른 벼의 분얼수 및 초장은 돈분액비 1년 시용구와 화학비료 사이에 유의한 차이를 나타내지 않았다. 돈분액비 3년 시용구의 분얼수는 화학비료 시용구보다 많았다. 쌀의 수량은 돈분액비 1년 시용구가 화학비료 대비 7% 감소하였다. 그러나 돈분액비 3년 연속 시용구에서 $495kg\;10a^{-1}$의 수량을 얻어 화학비료 대비 8% 증수하였다. 돈분액비로 벼를 3년 재배하였을 때 쌀의 단백질 함량은 7.01%로 대조구인 화학비료 시용구 보다 높은 수준이었다. 아밀로스 함량은 15.5~17.0%로 처리구별 유의성은 없었다. 식미치를 Toyo 식미계를 이용하여 조사한 결과 돈분액비 100% 처리구의 식미치가 65.3%로 화학비료 시용구보다 낮은 수준이었다. 쌀의 품위 특성에서 돈분액비 100% 처리구의 완전미 비율은 78.7%로 낮았으며, 불완전미의 비율을 높인 주 원인은 분상질립, 피해립의 비율이 높았기 때문이었다. 3년간 돈분 액비를 계속 사용한 결과, 화학비료 처리에 비해 토양 중 칼륨과 아연의 함량이 높았으나 다른 중금속 함량도 관행 화학비료 처리와 크게 다르지 않았다. 이상의 결과를 미루어 볼 때 돈분액비의 3년 시용시 돈분 액비의 연용이 쌀의 수량성에 나쁜 영향을 미치지는 않을 것으로 판단되지만 쌀의 단백질 함량이 증가하고 Toyo 식미치와 완전미 비율은 감소하는 결과를 얻었다. 돈분액비 3년 시용 후 토양의 칼륨 축적이 되므로 토양검정에 의한 액비 적량시용이 요구된다.

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References

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