The potential for the improvement of the nutritive value of soya-bean mean by different proteases in broiler chicks and broiler cockerels

S. Ghazi, Hugh Galbraith, M. R. Bedford

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

1. The potential for improving the nutritive value of commercial solvent-extracted, heat-treated soya-bean meal (SBM) by protease treatment was measured using growing broiler chicks and tube-fed broiler cockerels.

2. SBM was pre-treated (50degreesC for 2 h) with water alone; at alkaline pH (initial pH 8.25) with and without protease P1 (isolated from a Bacillus species) or at acid pH (initial pH 4.5) with and without protease P2 (isolated from an Aspergillus species) and incorporated into diets (290 g SBM/kg diet) for broiler chicks (20 chicks/treatment). Only protease P2 treatment improved chick performance; from 7 to 28 d of age, chicks fed on treated SBM had greater feed intakes and gained more weight than chicks fed on untreated SBM. Both proteases P1 and P2 significantly reduced chick serum anti-soya antibodies while protease P2 treatment increased apparent ileal nitrogen (N) digestibility and apparent N retention across the whole digestive tract.

3. Two tube-feeding experiments established that, of the treated SBMs used in experiment 1, only protease P2 treatment improved apparent N digestibility and true metabolisable energy. Also it was shown that increasing the temperature at which treated SBM was dried to 60degreesC, compared with freeze-drying or drying at 50degreesC reduced apparent N digestibility and true metabolisable energy of SBM with no significant interactions between enzyme treatment and drying temperature for both apparent N digestibility and TME.

4. It is concluded that, overall, the nutritional value of SBM assayed in a growth trial and by tube feeding was improved by treatment with protease P2 and not by treatment with protease P1.

Original languageEnglish
Pages (from-to)70-78
Number of pages8
JournalBritish Poultry Science
Volume43
Issue number1
DOIs
Publication statusPublished - 2002

Keywords

  • TREATED SOYBEAN-MEAL
  • PIGS FED DIETS
  • ENZYME SUPPLEMENTATION
  • GROWTH-PERFORMANCE
  • ILEAL DIGESTIBILITIES
  • METABOLIZABLE ENERGY
  • LUPINUS-ALBUS
  • AMINO-ACIDS
  • TRUE

Cite this

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title = "The potential for the improvement of the nutritive value of soya-bean mean by different proteases in broiler chicks and broiler cockerels",
abstract = "1. The potential for improving the nutritive value of commercial solvent-extracted, heat-treated soya-bean meal (SBM) by protease treatment was measured using growing broiler chicks and tube-fed broiler cockerels.2. SBM was pre-treated (50degreesC for 2 h) with water alone; at alkaline pH (initial pH 8.25) with and without protease P1 (isolated from a Bacillus species) or at acid pH (initial pH 4.5) with and without protease P2 (isolated from an Aspergillus species) and incorporated into diets (290 g SBM/kg diet) for broiler chicks (20 chicks/treatment). Only protease P2 treatment improved chick performance; from 7 to 28 d of age, chicks fed on treated SBM had greater feed intakes and gained more weight than chicks fed on untreated SBM. Both proteases P1 and P2 significantly reduced chick serum anti-soya antibodies while protease P2 treatment increased apparent ileal nitrogen (N) digestibility and apparent N retention across the whole digestive tract.3. Two tube-feeding experiments established that, of the treated SBMs used in experiment 1, only protease P2 treatment improved apparent N digestibility and true metabolisable energy. Also it was shown that increasing the temperature at which treated SBM was dried to 60degreesC, compared with freeze-drying or drying at 50degreesC reduced apparent N digestibility and true metabolisable energy of SBM with no significant interactions between enzyme treatment and drying temperature for both apparent N digestibility and TME.4. It is concluded that, overall, the nutritional value of SBM assayed in a growth trial and by tube feeding was improved by treatment with protease P2 and not by treatment with protease P1.",
keywords = "TREATED SOYBEAN-MEAL, PIGS FED DIETS, ENZYME SUPPLEMENTATION, GROWTH-PERFORMANCE, ILEAL DIGESTIBILITIES, METABOLIZABLE ENERGY, LUPINUS-ALBUS, AMINO-ACIDS, TRUE",
author = "S. Ghazi and Hugh Galbraith and Bedford, {M. R.}",
year = "2002",
doi = "10.1080/00071660120109935",
language = "English",
volume = "43",
pages = "70--78",
journal = "British Poultry Science",
issn = "0007-1668",
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TY - JOUR

T1 - The potential for the improvement of the nutritive value of soya-bean mean by different proteases in broiler chicks and broiler cockerels

AU - Ghazi, S.

AU - Galbraith, Hugh

AU - Bedford, M. R.

PY - 2002

Y1 - 2002

N2 - 1. The potential for improving the nutritive value of commercial solvent-extracted, heat-treated soya-bean meal (SBM) by protease treatment was measured using growing broiler chicks and tube-fed broiler cockerels.2. SBM was pre-treated (50degreesC for 2 h) with water alone; at alkaline pH (initial pH 8.25) with and without protease P1 (isolated from a Bacillus species) or at acid pH (initial pH 4.5) with and without protease P2 (isolated from an Aspergillus species) and incorporated into diets (290 g SBM/kg diet) for broiler chicks (20 chicks/treatment). Only protease P2 treatment improved chick performance; from 7 to 28 d of age, chicks fed on treated SBM had greater feed intakes and gained more weight than chicks fed on untreated SBM. Both proteases P1 and P2 significantly reduced chick serum anti-soya antibodies while protease P2 treatment increased apparent ileal nitrogen (N) digestibility and apparent N retention across the whole digestive tract.3. Two tube-feeding experiments established that, of the treated SBMs used in experiment 1, only protease P2 treatment improved apparent N digestibility and true metabolisable energy. Also it was shown that increasing the temperature at which treated SBM was dried to 60degreesC, compared with freeze-drying or drying at 50degreesC reduced apparent N digestibility and true metabolisable energy of SBM with no significant interactions between enzyme treatment and drying temperature for both apparent N digestibility and TME.4. It is concluded that, overall, the nutritional value of SBM assayed in a growth trial and by tube feeding was improved by treatment with protease P2 and not by treatment with protease P1.

AB - 1. The potential for improving the nutritive value of commercial solvent-extracted, heat-treated soya-bean meal (SBM) by protease treatment was measured using growing broiler chicks and tube-fed broiler cockerels.2. SBM was pre-treated (50degreesC for 2 h) with water alone; at alkaline pH (initial pH 8.25) with and without protease P1 (isolated from a Bacillus species) or at acid pH (initial pH 4.5) with and without protease P2 (isolated from an Aspergillus species) and incorporated into diets (290 g SBM/kg diet) for broiler chicks (20 chicks/treatment). Only protease P2 treatment improved chick performance; from 7 to 28 d of age, chicks fed on treated SBM had greater feed intakes and gained more weight than chicks fed on untreated SBM. Both proteases P1 and P2 significantly reduced chick serum anti-soya antibodies while protease P2 treatment increased apparent ileal nitrogen (N) digestibility and apparent N retention across the whole digestive tract.3. Two tube-feeding experiments established that, of the treated SBMs used in experiment 1, only protease P2 treatment improved apparent N digestibility and true metabolisable energy. Also it was shown that increasing the temperature at which treated SBM was dried to 60degreesC, compared with freeze-drying or drying at 50degreesC reduced apparent N digestibility and true metabolisable energy of SBM with no significant interactions between enzyme treatment and drying temperature for both apparent N digestibility and TME.4. It is concluded that, overall, the nutritional value of SBM assayed in a growth trial and by tube feeding was improved by treatment with protease P2 and not by treatment with protease P1.

KW - TREATED SOYBEAN-MEAL

KW - PIGS FED DIETS

KW - ENZYME SUPPLEMENTATION

KW - GROWTH-PERFORMANCE

KW - ILEAL DIGESTIBILITIES

KW - METABOLIZABLE ENERGY

KW - LUPINUS-ALBUS

KW - AMINO-ACIDS

KW - TRUE

U2 - 10.1080/00071660120109935

DO - 10.1080/00071660120109935

M3 - Article

VL - 43

SP - 70

EP - 78

JO - British Poultry Science

JF - British Poultry Science

SN - 0007-1668

IS - 1

ER -