Nutritional Evaluation of Three Local Barley Varieties and the Impact of Dietary Enzyme on their Apparent Metabolizable Energy

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Two experiments were conducted to determine the true metabolizable energy corrected to zero nitrogen balance (TME<SUB>n</SUB>) and true amino acid availability (TAAA) of three local barley varieties, two-row Litani (L<SUB>2</SUB>), two-row Pamir-35 (P<SUB>2</SUB>), and six-row Rihan-03 (R<SUB>6</SUB>) and to study the effect of enzyme supplementation on their apparent metabolizable energy corrected to zero nitrogen balance (AME<SUB>n</SUB>). Forty grams of glucose, corn, or barley variety grains was precision intubated to eight individually caged Babcock B 380 roosters. The TME<SUB>n</SUB> of L<SUB>2</SUB>, P<SUB>2</SUB>, and R<SUB>6</SUB> (3224, 3419, and 3253kcal/kg, on dry matter basis (DM), respectively) was lower than that of corn (P<0.05). All the TAAA values in P<SUB>2</SUB> and that of methionine, cystine, lysine, threonine, proline, and valine in L<SUB>2</SUB> and R<SUB>6</SUB> were comparable with that of corn. Again, compared to corn, all other TAAA values in L<SUB>2</SUB> and R<SUB>6</SUB> were significantly lower, except for serine, glutamic acid, and isoleucine in R<SUB>6</SUB>. In the AME<SUB>n</SUB> experiment, a reference diet containing 55% glucose and diets containing 50% corn or L<SUB>2</SUB>, P<SUB>2</SUB>, and R<SUB>6</SUB> at the expense of glucose, supplemented with either 0 or 0.1% enzyme, were each fed in 4 replicates (cages) to 4 birds/cage for 4 d, during which total excreta were collected at 48 and 96 h. Enzyme supplementation resulted in an AME<SUB>n</SUB> improvement of 4.33, 11.5, and 17.2% for L<SUB>2</SUB>, P<SUB>2</SUB>, and R<SUB>6</SUB>, respectively with an average AME<SUB>n</SUB> of 3243kcal/kg DM. In conclusion, TAAA in P<SUB>2</SUB> was similar to corn whereas that of some amino acids such as arginine and leucine were lower in L<SUB>2</SUB> and R<SUB>6</SUB>. Enzyme supplementation to barley diets resulted in an average AME<SUB>n</SUB> improvement of 11%. The current findings can assist and encourage poultry producers in formulating least cost rations containing local barley varieties.

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  • The journal of poultry science  

    The journal of poultry science 43(3), 228-234, 2006-07-25 

    日本家禽学会

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各種コード

  • NII論文ID(NAID)
    10018180120
  • NII書誌ID(NCID)
    AA11564513
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13467395
  • NDL 記事登録ID
    7990608
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-J694
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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