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Changes of Nitrogen and Soluble Reactive Phosphorus Content in Hanwoo Manure Using Probiotics to Feed and Manure: A Field Study

사료와 축분에 생균제 첨가 시 한우분 내 질소와 수용성인의 함량 변화: 현장연구 중심으로

  • Choi, In-Hag (Department of Companion Animal & Animal Resources Sciences, Joongbu University)
  • 최인학 (중부대학교 애완동물자원학과)
  • Received : 2013.02.12
  • Accepted : 2013.03.20
  • Published : 2013.03.29

Abstract

This study was conducted to investigate the changes in nitrogen and soluble reactive phosphorus(SRP) contents from hanwoo manure using probiotics to feed and manure additives during 5 weeks. A total of 45 hanwoo(24 months old) with averaging $580{\pm}20$ kg in weight were randomly assigned to 3 dietary treatments with 3 replicates per treatment(5 hanwoo per pen, $5{\times}8m$). The treatment were supplemented, control, T1(10 kg roughage + 2 kg concentrate(2% probiotics as-fed basis)), and T2(10 kg roughage + 2 kg concentrate(2% probiotics as-fed basis) + 7 kg probiotics on the surface of hanwoo manure (top-dressing)). During the experimental period, there were statistically significant differences(P<0.05) in pH values at 3 and 5 weeks; TN contents at 5 weeks; and SRP contents at 5 weeks in all treatments. Adding probiotics to feed or feed and manure increased manure pH in comparison with controls. As time increased, changes in TN contents decreased in the order: T2 > Control > T1. Especially, the reduction in SRP contents in all treatments at 5 weeks was in following order: T1 > T2 > Control. This result suggests that it is possible to make efficient use of probiotics as feed and manure additives for reducing environmental pollution or to provide fundamental information on livestock managements to producers.

Acknowledgement

Supported by : 농촌진흥청

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