Studies on Feed Values of Oak(Quercus serrata Thunb.) and Pine (Pinus densiflora) Browses

Chemical composition, mineral compounds, cellular constituents, digestibility for dry matter, total digestible nutrients, and tannin constituents were investigated to evaluate feed value for oak and pine browses to use effectively browses as forest by products. The results of this study were as follows : Crude protein was 6.00∼7.89% for oak browse and 5.15∼6.06% for pine browse sampled through July to October, It gradually decreased in oak browse but not in pine browse as the growth of tree was progressed stages. Crude fat content of oak and pine browse were 1.90∼2.68% and 6.30∼6.33%. Crude fiber content was 33.3∼35.2% for oak browse and 33.7∼34.8% for pine browse and they tended to increase according to the growth stage of trees. Crude ash was 3.13∼2.78% for oak browse and 2.11 ∼1.93% for pine browse, respectively. Ca, Mg, Mn and Cu content were higher in oak browse than those in pine browse, but P, K, Na, Fe, and Zn content were similar each other. Mineral contents were decreased as the growth of tree was progressed(P<.05). Acid detergent fiber content of pine and oak browse were 47.7∼52.0% and 46.1∼48.1%, and they increased as the tree grew. Neutral detergent fiber content of pine and oak browse were 64.1∼67.9% and 65.0∼66.5%. NDF content was increased according to the tree growth in pine browse but it was the same in oak browse(P<.05). in vitro digestibility of dry matter was 51.7∼48.4% for pine browse that decreased according to the tree growth(p<.05) and 53.0∼5l.4% for oak browse. Total digestible nutrients of oak browse was 50.9∼52.4% and that of pine browse was 47.7∼51.1% which decreased as the tree grew. Oak browse showed the same relative feeding value(RFV) as pine browse, and it decreased as the growth of tree was progressed(P<.05). Tannin contents was 2.96% for oak browse, 6.27% for pine browse. Tannin contents decreased when browses were dried.

졸참나무지엽과 소나무지엽의 사료가치에 관한 연구

본 연구는 산림부산물인 지엽류를 보다 효율적으로 활용할 수 있는 방안을 모색하고자 졸참나무지엽과 소나무지엽에 대한 사료가치를 구명하였으며 그 결과를 요약하면 다음과 같다. 일반조성분인 조단백질 함량은 참나무지엽과 소나무지엽이 각각 6.00∼7.89%, 5.15∼6.06%로 참나무지엽이 다소 높았으며 생육이 진행됨에 따라 참나무지엽은 감소하였으나 소나무지엽은 생육시기에 크게 영향을 받지 않았다. 조지방 함량은 각각 1.90∼2.68%, 6.30∼6.33%로 소나무지엽이 현저하게 높은 수준이었고, 조섬유 7 함량은 각각 33.3∼35.2%, 33.7∼34.8%로 비슷하였으며 생육이 진행됨에 따라 증가하는 경향이었다. 그리고 조회분 함량은 각각 3.13∼2.78%, 2.11∼l.93%로 참나무지엽이 약간 높았다. 무기물 함량은 Ca, Mg, Mn, Cu가 소나무 지엽보다 참나무지엽이 높은 수준이었고 P, K, Na, Fe, Zn은 비슷한 수준이었으며 생육이 진행됨에 따라 대부분 감소하는 경향이었다. 소나무지엽과 참나무지엽의 ABF 함량은 각각 47.7∼52.0%, 46.1∼48.1%로 비슷하였으며 생육이 진행됨에 따라 증가하였고(P<.05), NDF 함량은 각각 64.1∼67.9%, 65.0∼66.5%로 비슷하였으며 생육이 진행됨에 따라 소나무지엽은 증가하였으나(P<.05) 참나무지엽은 비슷하였다. 건물소화율은 소나무지엽이 51.7∼48.4%로 생육이 진행됨에 따란 감소하였고, 참나무지엽은 53.0%∼51.4%로 비슷하였다. 가소화양분층량은 참나무지엽이 50.9∼52.4% 이었고, 소나무지엽은 47.7∼51.1%로 생육이 진행됨에 따라 감소하였으며(P<.05), 상대적 사료가치는 참나무지엽과 소나무지엽이 비슷하였고 생육이 진행됨에 따라 낮아지는 경향이었다. 탄닌 함량은 참나무지엽과 소나무지엽이 각각 2.96%, 6.27%로 소나무지엽이 높았으며 지엽을 건조하였을 때 각각 2.46%, 4.79%로 탄닌 함량이 낮아지는 경향이었다.