酵素分析を基礎とした飼料の可消化炭水化物含量の推定法とその市販輸入乾草評価への応用  [in Japanese] Prediction of Digestible Carbohydrate Contents of Feed and its Application to Nutritional Evaluation of Various Imported Hays  [in Japanese]

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Abstract

飼料の可消化炭水化物含量を酵素分析を基礎として推定した。可消化炭水化物含量は可消化非構造性炭水化物含量と可消化構造性炭水化物含量の和として求めた。可消化非構造性炭水化物はNCWFEの栄養的均一性から,可消化構造性炭水化物は総繊維を構成するOaとObの消化率データから推定した。その結果, in vivoの値と近似する可消化炭水化物の値が得られた。この値を乳牛の栄養管理指標に利用するために10例の乳牛飼養試験成績について可消化炭水化物摂取量と乳脂量,乳蛋白質量,乳糖量との関係をみたが,1kgの可消化炭水化物摂取量当り0.12kgの乳糖が生産されるという結果を得た。

Contents of digestible carbohydrate in three forages and four concentrates was estimated as an available energy in feeds by two methods, the National Research Council (NRC) method and an enzymatic analysis method. The NRC method was based on a model using contents of neutral detergent fiber, acid detergent fiber, lignin, crude protein, crude fat, acid detergent insoluble crude protein and neutral detergent insoluble crude protein. The enzyme analysis method was based on contents mainly of organic cell wall, Oa and Ob fraction in cell wall and non-structural carbohydrate fraction (NCWFE). Digestible carbohydrate is ketogenic, glucogenic and aminogenic precursors in the tissues of lactating cows and contributes to milk production. From ten feeding experiments using lactating cows, it was observed that 1 kg of digestible carbohydrate produced 0.12±0.01kg of lactose. This value (0.12) may be used as nutritional guideline of digestible carbohydrate. Lactose yield can be calculated as 0.12×digestible carbohydrate intake (kg). And also, milk yield was accurately predicted from lactose yield using the following equation obtained dairy farmers lactating data. Milk yield (kg/day)=0.019×Lactose (g/day)+5.2 (r=0.96, P<0.01). Using this prediction methods, digestible carbohydrate contents and milk yield were estimated for 46 imported grass hays used in Japanese dairy farms (i.e. timothy hay, sudangrass hay, oat hay, bermudagrass hay). It was shown that there are considerable variations in the feed values among the hays.

Journal

  • Japanese Journal of Grassland Science

    Japanese Journal of Grassland Science 52(3), 149-154, 2006

    Japanese Society of Grassland Science

References:  24

Codes

  • NII Article ID (NAID)
    110005519200
  • NII NACSIS-CAT ID (NCID)
    AA1202832X
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    0447-5933
  • NDL Article ID
    8573802
  • 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  NDL  NII-ELS  IR  J-STAGE 
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