철원지역에서 가축분뇨 발효액비 시용수준이 벼의 수량과 품질에 미치는 영향 = Effects of Application Rates with Swine Liquid Manure on Rice Yield and Quality in Cheorwon Region

국문 초록 (Abstract)

양돈분뇨 발효액비 시용량이 벼 생육과 수량에 미치는 영향을 구명하기 위하여 양돈분뇨 발효액비를 벼 재배 질소 추천시비량인 11kg N/10a를 기준으로 하여 100%, 120%, 150%, 180% 수준으로 처리 하여 전량 기비로 시용하였다. 1. 양돈분뇨 발효액비 100%, 120% 시용구는 생육초기 벼의 분얼수 및 초장에서 양호하였다. 양돈분뇨 발효액비 150%, 180% 시용구는 분얼수가 많고 초장이 큰 과번무 상태를 나타내었다. 벼의 수량은 양돈분뇨 발효액비 120% 시용구는 양돈분뇨 발효액비 100% 시용구 대비 11% 증수 되었다. 양돈분뇨 발효액비 150% 시용구는 100% 시용구 대비 10% 감수하였다. 양돈분뇨 발효액비 180% 시용구는 등숙률과 천립중이 낮아져 19% 감수되었다. 2. 양돈분뇨 발효액비 100% 시용구의 단백질 함량은 7.9%로서 가장 낮았다. 그러나 양돈분뇨 발효액비 150%, 180% 시용구에서는 단백질 함량이 각각 9.0, 13.3%로 높아졌다. 돈분뇨 발효액비 180% 시용구는 완전미 비율이 42%로 매우 낮았다. 양돈분뇨 발효액비 적량시용은 벼 수량 증수와 쌀 품질 향상이 가능하나 벼 추천질소시비량 120% 이상 시용시 과번무로 등숙률과 천립중이 낮아졌으므로 양돈분뇨 발효액비 시용시 적량시용이 매우 중요한 것으로 결론 내려진다. 3. 액비 시용수준이 높을수록 토양의 치환성 K 함량이 높아졌다. 양돈분뇨 발효액비 100% 시용구의 치한성 K함량이 $0.66\;cmol+kg^{-1}$이었으나 180% 시용구에서는 $0.89\;cmol+kg^{-1}$으로 높아졌다. 양돈분뇨 발효액비 시용에 따른 논토양의 중금속 함량은 높아지지 않았다. 시험 후 토양의 구리, 아연함량은 토양환경보전법 토양오염 기준치 이하이었다.

다국어 초록 (Multilingual Abstract)

This study was carried out to determine the effect of swine liquid manure on the rice growth and yield in 2006. Field experiment was conducted under variable application rates; 100%, 120%, 150%, 180% N level of slurry based on 11 kg N 10a recommended amount of nitrogen. The experimental sites were located at Cheorwon in Gangwondo area. The results were summerized as follows; In the plot treated with swine liquid manure of 150% and 180% N levels, the plant height and tillers were higher, and the color of leaf was darker than that of 100% N level of swine liquid manure. Rice yield in the plot applied with 120% N slurry level was increased at 11%, but those of 150%, 180% N-level application plots were reduced 10, 19% compared to 100% N level, respectively. Rice quality of the 100 and 120% application plots of swine liquid manure was significantly better than those of 150 and 180% levels of application plots. Total nitrogen content in rice plant after harvesting was increased with increasing levels of swine liquid manure. The content of K in the soil was accumulated in plot treated with 150%, 180% slurry compared to control plot. The heavy metal contents in soils were not increased treated with swine liquid manure. The density of bacteria was low in the application plot of 180%N of liquid swine manure. The bacteria/fungi ratio was highest in 120% N level of liquid manure treatment.

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