Studies on the Utilization of Nitrogen by Korean Native Goat I Effect of Different Levels of Crude Protein Intake on the Nitrogen Retention

한국재래산양(韓國在來山羊)의 질소이용(窒素利用)의 관한 연구(硏究) I. 단백질(蛋白質) 급여수준(給與水準)이 질소축적(窒素蓄積)에 미치는 영향(影響)

This experiment was carried out to evaluate the effect on different levels of crude protein intake according to sex and body weight on the nitrogen retention, and the protein requirement for feeding standard of the Korean Native Goat. The results obtained from the study were as follows. 1. The nitrogen retention rate when the female goat at 6 months age (13kg) had taken native grass hay 40%(126g) and flaking barley 60%(186g) was 36 percent, and when the intake matter was native grass hay 55%(226g) and flaking barley 45%(186g) was 25.6 percent. 2. The nitrogen retention rate when the meal goat at 5 months age (11kg) had taken native grass hay 47%(245g), flaking barley 29%(153g) and soybean meal 24%(126g) was 52.4 percent and when the intake was native grass hay 42%(206g) and flaking barley 58%(279g) was 40.7 percent. But if the in take matter was only (328g) native grass hay (crude protein 8%) it was -23.9 percent. 3. Maintenance nitrogen requirement of Korean native goat were estimated about 5g per day to 11 or 13kg live weight.

한국재래산양(韓國在來山羊)의 사양표준(飼養標準)을 설정(設定)하는데 필요(必要)한 항목중(項目中)의 하나인 단백질(蛋白質)의 요구량(要求量)을 구명(究明)하기 위하여 성별(性別)과 월령(月令)에 따르는 체중별(體重別)로 단백질(蛋白質) 급여수준(給與水準)에 차이(差異)를 두고 질소(窒素)의 축적률(縮積率)을 측정(測定)한 결과(結果)는 다음과 같다. 1. 생후(生後) 6개월령(個月令)의 생체중(生體重) 13kg의 빈산양(牝山羊)은 야건초(野乾草) 40%(126g)와 압맥(壓麥) 60%(186g)를 급여(給與)하였을때 질소(窒素)의 축적률(縮積率)은 36%였고, 야건초(野乾草) 55%(226g)와 압맥(壓麥) 45%(186g)를 급여(給與)하였을 때는 질소축적률(窒素縮積率)이 25.6%였다. 2. 생후(生後) 5개월령(個月令)의 체중(體重) 11kg의 모산양(牡山羊)에게 야건초(野乾草) 47%(245g), 압맥(壓麥) 29%(153g) 및 대두분(大豆粉) 24%(126g)를 급여(給與)하여 단백질(蛋白質) 함량(含量)을 20%로 하였을때 질소축적률(窒素縮積率)은 54.2%였고, 야건초(野乾草) 42%(206g)와 압맥(壓麥) 58%(279g)를 급여(給與)하였을때는 질소축적률(窒素縮積率)이 40.7%였다. 그러나 야건초(野乾草)(조단백함량(粗蛋白含量 8%)만을 100%(328g) 급여(給與)하였을 때 질소축적률(窒素縮積率)은 -23.9%이었다. 3. 생체중(生體重) 11~13kg의 재래산양(在來山羊)은 1일(日) 5g 정도(程度)의 질소(窒素)가 유지(維持)에 필요(必要)하다고 인정(認定)되었다.