Studies on the Utilization of Nitrogen by Korean Native Coat II. Effect of Different Levels of Crude Protein on the Nitrogen Retention and Urea Content in Serum

한국(韓國) 재래산양(在來山羊)의 질소이용(窒素利用)에 관(關)한 연구(硏究) II. 단백질(蛋白質) 급여수준(給與水準)이 질소축적(窒素蓄積)과 혈청내(血淸內) 요소함량(尿素含量)에 미치는 영향(影響)

  • Kwon, Soon Ki (Dept. of Animal Science, Coll. of Agriculture, Chungnam Natl. Univ.) ;
  • Kim, Kyo Joon (Dept. of Animal Science, Coll. of Agriculture, Chungnam Natl. Univ.) ;
  • Oh, Hong Rock (Dept. of Animal Science, Coll. of Agriculture, Chungnam Natl. Univ.) ;
  • Kim, Sang Keun (Dept. of Animal Science, Coll. of Agriculture, Chungnam Natl. Univ.)
  • Published : 1981.06.30

Abstract

This experiments was carried out to evaluate the effect of nitrogen retention on different levels of crude protein intake according to live weight, and the crude protein and urea content in serum of the Korean native goat. The results obtained are as follows: 1. When the female goat at 8 months age (14kg) had taken nitrogen free diet, the content of endogenous urinary nitrogen was 1.29g and endogenous fecal nitrogen was 1.27g per day. Therefore, the goat needs minimum level of crude protein per day. 2. When the thermometer checked below-$10^{\circ}C$, the nitrogen retention rate showed minus reaction in spite of 20% crude protein level. This suggested that the low temperature was consumed higher energy to maintain the body. 3. The nitrogen retention rate of the pregnant female goat of 20kg live weight, however, decreased as compared with the growing goat and was 17~20%. 4. According to the levels of crude protein were lower, crude protein and urinary nitrogen contents in serum were greatly decreased.

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Acknowledgement

Supported by : 문교부