アミノ酸添加低蛋白質飼料の給与による肉豚における窒素排泄量の低減  [in Japanese] Reduction of Nitrogen Excretion of Growing-finishing Pigs by Feeding Reduced Protein, Amino acid-supplemented Diets  [in Japanese]

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Abstract

子豚64頭を供試して, 育成期 (体重30-70kg) および肥育期 (体重70-105kg) におけるアミノ酸添加低蛋白質飼料の給与が窒素排泄量に及ぼす効果を調べた。供試飼料は標準的な粗蛋白質 (CP) 含量の飼料, 声れよりCPを4%単位低下させ, リジンおよびトレオニンを添加した飼料ならびにアミノ酸無添加の低CP飼料であった。体内への窒素の蓄積量は日本飼養標準・豚 (1993年版) に示された数式により推定し, 糞および尿への窒素排泄量は, 窒素の摂取量, 吸収量および蓄積量から算出した。<br>育成期においてはアミノ酸添加低CP飼料を給与した豚の1日増体量および飼料要求率は標準CP飼料給与の場合と変わらなかったが, 肥育期の発育成績は標準CP飼料に及ばなかった。アミノ酸無添加の低CP飼料の発育成績は育成期および肥育期とも著しく劣った。<br>尿中への窒素排泄量は, 低CP飼料を給与した場合に, アミノ酸添加の有無にかかわらず, 標準CP飼料に比較して少なくなった。アミノ酸添加CP飼料の平均尿中窒素排泄量は, 標準CP飼料に比較して, 育成期および肥育期でそれぞれ, 63%および68%と著しく低減された。糞中への窒素排泄量は尿中排泄量の場合ほどの差異はなかったが, 同様の傾向が認あられた。

Sixty-four pigs were used to determine the effect of feeding reduced crude protein (CP), amino acid (AA)-supplemented diets on nitrogen excretion during growing (30 to 70kg BW) and finishing (70 to 105kg BW) period. Pigs were fed either diets containing standard CP, or diets reduced in CP by 4% units with or without lysine and threonine supplementation. The amounts of nitrogen retention were estimated by the equations shown in Japanese Feeding Standard for Swine (1993), and fecal and urinary nitrogen excretions were calculated on the intake, absorption and retention of nitrogen.<br>During the growing period, daily gain and feed conversion were similar between pigs fed the AA-supplemented low-CP diets and those fed the standard-CP diets, but during the finishing period AA supplementation of the low-CP diet failed to improve growth performance to the levels attained by pigs fed the standard-CP diets. Reduction of dietary CP without AA supplementation dramatically reduced pig growth performance in the both periods.<br>Feeding reduced dietary CP, regardless of AA supplementation, resulted in reduced urinary nitrogen excretion compared with feeding the standard-CP diets. The average amount of urinary nitrogen excretion for pigs fed the AA-supplemented low-CP diets was 63% and 68% of that for pigs fed the standard-CP diets in growing period and finishinig period, respectively. Fecal nitrogen excretion showed to be similar in pattern to that of urinary one except that the differences were less pronounced.

Journal

  • Nihon Yoton Gakkaishi

    Nihon Yoton Gakkaishi 34(1), 15-21, 1997-04-10

    The Japanese Society of Swine Science

References:  14

Cited by:  25

Codes

  • NII Article ID (NAID)
    10008284627
  • NII NACSIS-CAT ID (NCID)
    AN10202971
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0913882X
  • NDL Article ID
    4185519
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-1082
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
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