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Studies on the Types and Rates of Application of Cattle Slurry and Swine Manure Fermented with Sawdust on Productivity of Silage Corn and Leaching of Nutrients

우분액비 및 톱밥발효돈분 시용이 사일리지용 옥수수 생산성 및 양분용탈에 미치는 영향

  • Published : 2006.12.30

Abstract

This study was conducted to investigate the effects of the types and rates of application of animal manure on productivity of silage corn and environmental pollution in silage corn cultivation soil. The experiment was confirmed in lysimeter which was constructed with 0.30m diameter, and 1 m depth. This study was arranged in split plot design. Main plots were the types of cattle slurry (CS), swine manure fermented with sawdust (SMFS) and chemical fertilizer (CF), Subplots were the application rates of animal manure, as urea, such as 100, 200 and 400 kg N $ha^{-1}$. Dry matter(DM) and nitrogen yields of silage corn enhanced as increased application rates of CS, SMFS and CF (p<0.05). DM yield reveals that there is an decrease in order of CF>CS>SMFS (p<0.05). Crude protein (CP) contents of the whole silage corn increased as increased application rates of CS, SMFS and CF. IN addition, $NO_{3^-}N$ content in leaching water by application of animal manure reveals that there is an decrease in order SMFS>CF>CS (p<0.05). However, $NH_{4^-}N$ content was hardly influenced by application of animal manure, and $NH_{4^-}N$ content increased with application rates increased. $PO_{4^-}P$ content in leaching water by application of animal manure reveals that there is an decrease in order of SMFS>CF>CS. $PO_{4^-}P$ increased as increasing application rates (p<0.05), whereas $PO_{4^-}P$ in leaching water maintained a low levels.

본 연구는 가축분뇨의 종류와 시용수준에 따른 사일리지용 옥수수의 생산성과 N과 P의 용탈량을 조사하여 친환경 조사료 생산을 위한 기초자료를 제공하기 위해 수행되었다. 본 시험은 건국대학교 초지 시험포장 내의 사양토로 충전된 Lysimeter(직경 30cm, 깊이 1m)를 이용하여 화학비료, 우분액비 및 톱밥발효돈분에 대하여, N 시용수준을 100kg/ha, 200kg/ha, 400kg/ha씩으로 시험구를 배치 수행하였다. 옥수수 건물 및 질소 생산성은 화학비료>우분액비>톱밥발효돈분 순이었고(p<0.05), 시용수준이 증가함에 따라 그 생산성도 증가하는 경향을 나타냈다(p<0.05). 옥수수의 조단백질 함량은 화학비료>톱밥발효돈분>우분액비 순이었으나 시용수준이 증가함에 따라 조단백질 함량은 증가하는 경향으로 나타났다. 분뇨시용 형태별 용탈수 중의 $NO_{3^-}N$ 함량은 톱밥발효돈분>화학비료>우분액비 순이었으며(p<0.05), $NH_{4^-}N$ 함량은 큰 차이를 보이지 않았고, 질소시용수준이 증가함에 따라 비례하여 증가하는 경향을 나타냈다. 그러나 결코 1 mg/L을 상회하지는 않았다. 가축분뇨의 시용형태별 평균 $PO_{4^-}P$ 농도는 톱밥발효돈분>화학비료>우분액비 순이었고 시용수준이 증가함에 따라 유의적으로 증가하였지만(p<0.05), 용탈량은 매우 적었다.

Keywords

References

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