Abstract

본 연구는 몇 가지 조사료원을 유 산양에 급여하였을 때 조사료의 중류에 따른 채식습성을 구명하고자 2007년 3월부터 10월까지 충남대학교 부속사육장에서 수행하였다. 공시시료는 화본과목초 (grasses)는 Lolium perenne, Festuca arundinacea, Poa pratensis, Agrostis alba 및 mixed grass (혼합목초)의 5종과, 두과목초(legumes)는 Trifolium pratense, Medicago sativa, Trifolium repens, Melilotus officinalis 및 Vicia villosa의 5종, 수엽(browse)으로 Quercus serrata Thunb., Prunus jamasakura Sieb., Quercus aliena Blume, Robinia pseudoaccacia 및 Pinus densiflora의 5종과 잡초 (weeds)는 Artemisia princeps Pampanini, Erigeron canadensis, Alopecurus aegualis Sobolewski, Echinochloa crusgalli var. frumentacea (Roxb.) Wight 및 Rumex crispus의 5종을, 야초 (Weeds)는 Zoysia japonica Steudel, Agropyron tsuku- shiense var. transiens (Hack) Ohwi., Arundinella hirta (Thunb.) Tanaka, Miscanthus sinensis Anderss 및 Phragmites comunis Trin의 5종 등 총 25종을 공시하였다. 시험축은 Saanen종 유 산양(female) 10두를 공시하였으며, 평균체중은 31 kg이었다. 시료는 초종 당 건물기준으로 0.5 kg씩 급여하였고 오전 9시부터 오후 6시까지 시험하였으며 시험결과는 다음과 같다. 공시시료의 조사료원별로 분석한 화학적성분과 건물소화율은 대체적으로 채취장소, 초종, 생육단계 및 예취시기에 따라 차이를 보였다. 채식량, 채식비율 및 채식순위는 초종 및 수종에 따라 차이를 보였으며, 섬유소물질의 함량이 낮고 건물소화율이 높은 조사료를 더 즐겨 채식하는 양상을 나타내었다. 공시된 25 초종 중 perennial ryegrass, tall fescue, red clover 순으로 즐겨 채식하였으며, 소리쟁이가 가장 기호성이 낮았다. 유 산양 (Saanen)은 화본과목초 (33.3%) 및 두과목초 (25.7%)를 총 59.0% 채식하였던 반면에 수엽은 19.6%, 잡초는 15.9%, 야초는 5.5%를 채식하였던 것으로 보아 채식습성은 초류채식형 (grazer type)에 더 가까운 것으로 판단된다. The object of this experiment was to investigate the food habits of dairy goats fed with various roughage sources. The experimental trials were conducted at Chungnam National University in 2007. The experimental roughages include five sources and 25 species in all; grass sources: 5 species (Lolium perenne, Festuca arundinacea, Poa pratensis, Agrostis alba and mixed grass, legume sources: 5 species (Trifolium pratense, Medicago sativa, Trifolium repens, Melilotus officinalis and Vicia villosa), browse sources : 5 species (Quercus serrata Thunb., Prunus jamasakura Sieb., Quercus aliena Blume, Robinia pseudoaccacia and Pinus densiflora), weed sources: 5 species (Artemisia princeps Pampanini, Erigeron canadensis, Alopecurus aegualis Sobolewski, Echinochloa crusgalli var. frumentacea (Roxb.) Wight and Rumex crispus), and native grass sources: 5 species (Zoysia japonica Steudel, Agropyron tsukushiense var. transiens (Hack) Ohwi., Arundinella hirta (Thunb.) Tanaka, Miscanthus sinensis Anderss and Phragmites comunis Trin). Ten dairy goats(Saanen) were selected which had nearly the same body weight(average 31kg). Experimental roughages were prepared by 0.5kg per 1 species fed to dairy goats, and the experiment was carried out from 09:00 to 18:00. The chemical composition and dry matter digestibility of each roughage source and species were significantly different at the sampling area, plant species, growth stages and cutting period. The dairy goats ate more roughages which had low fibrous contents, but high dry matter digestibility. Among all the 25 species of roughages, the favorite intake species order by dairy goat was observed like this: perennial ryegrass, tall fescue and red clover, respectively, and the lower intake species order was Rumex crispus. On the other hand, compared to each roughage source, total intake amount by dairy goats was showed as forage grasses (59.0%) which contained grasses(33.3%) and legumes (25.7%), browse (19.6%), weeds (15.9%) and native grasses (5.5%). Based on the result, the food intake type of dairy goats seems to be closer to grazer type.

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