飼養試験を基礎とするチモシー乾草の品質評価  [in Japanese] Nutritive Estimation of Timothy Hay Based on Feeding Experiments with Dairy Cattle  [in Japanese]

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Abstract

刈り取時期を異にして調製した3種類のチモシー乾草(A,B,C)の飼養試験を4頭の乳牛を用いて実施した。乾草は自由採食とし,市販乳牛用配合飼料を1日1頭当たり乾物で4.9kgの制限給与とした。乾草のTDN含量は乾物中,59.5%(乾草A),55.8%(乾草B)および50.6%(乾草C)と評価され,乾物摂取量は乾草Cの8.5kgから,乾草Aの10.3kgと変動した。本報告では乾草の相対的な評価手法として,乾草Aに対する乾草B,Cの摂取TDN量の比率を採用したが,その値は乾草Bで85%,乾草Cでは69%であった。また,平均乳量は乾草Aが17.8kg,乾草Bが16.4kg,乾草Cが14.6kgであり,その差は有意(p<0.05)であった。乳糖と乳蛋白質の生産量では乾草Aが乾草Bに比して有意に高い値を示したが,その理由は乾草間の摂取可消化炭水化物の相違に由来すると考察した。

Three hays of different cutting stage made from timothy were offered ad libitum to four Holstein cows in a 12 days changeover feeding experiments. In addition, 4.9kg of commercial formula feed was supplmented to each cow as dry basis. Three hays had TDN value of 59.5%(hay A), 55.8%(hay B) and 50.6%(hay C), respectively. The daily dry matter intake of hay varied from 8.5kg (hay C) to 10.3 kg (hay A). In this report, the ratio of the amounts in intake TDN with hay A treatment to hay B and hay C treatment was used as index for relative feed value estimation. The value of these index ware 85%(hay B) and 69%(hay C), respectively. The mean daily milk yields were 17.8kg in hay A, 16.4kg in hay B and 14.6kg in hay C treatment respectively. The milk protein and milk sugar (lactose) yields was significant higher (p<0.05) with hay A treatment than with hay C treatment, and this results was discussed that it may due to difference in the amounts of intake digestible carbohydrates between two hays.

Journal

  • Japanese Journal of Grassland Science

    Japanese Journal of Grassland Science 49(6), 629-634, 2004

    Japanese Society of Grassland Science

References:  23

Cited by:  3

Codes

  • NII Article ID (NAID)
    110003849663
  • NII NACSIS-CAT ID (NCID)
    AN10559677
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0447-5933
  • NDL Article ID
    6885494
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産) // ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-344
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE 
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