THE ENHANCEMENT OF THE NUTRITIVE-VALUE OF PEAS FOR BROILER-CHICKENS -AN EVALUATION OF MICRONIZATION AND DEHULLING PROCESSES

Citation
Fa. Igbasan et W. Guenter, THE ENHANCEMENT OF THE NUTRITIVE-VALUE OF PEAS FOR BROILER-CHICKENS -AN EVALUATION OF MICRONIZATION AND DEHULLING PROCESSES, Poultry science, 75(10), 1996, pp. 1243-1252
Citations number
44
Categorie Soggetti
Agriculture Dairy & AnumalScience
Journal title
ISSN journal
00325791
Volume
75
Issue
10
Year of publication
1996
Pages
1243 - 1252
Database
ISI
SICI code
0032-5791(1996)75:10<1243:TEOTNO>2.0.ZU;2-W
Abstract
The effects of dehulling and micronization (infrared heating) on the n utritive value of three cultivars (Impala, Radley, and Sirius) of peas (Pisum sativum) varying in coat color for broiler chickens were studi ed. Dehulling increased (P less than or equal to 0.05) protein and sta rch contents and decreased (P less than or equal to 0.05) fiber conten t of peas. Also, the concentrations of most amino acids slightly incre ased (P greater than or equal to 0.05). Micronization slightly changed (P greater than or equal to 0.05) the chemical composition of peas. M oisture, protein, fiber and phosphorus contents marginally decreased. The concentrations of aspartic acid, glutamic acid, isoleucine, lysine , cystine, threonine, and tyrosine decreased (P less than or equal to 0.05), whereas that of methionine slightly increased (P greater than o r equal to 0.05). Lysine concentration was decreased by 2.7%. The TME( N) and average true AA availability values determined with adult cocke rels were improved (P less than or equal to 0.05) by micronization, bu t the availabilities of lysine were decreased by 11.3, 4.4, and 2.0% f or Impala, Radley and Sirius, respectively. The decrease was significa nt (P less than or equal to 0.05) for Impala and Radley but not signif icant for Sirius peas. Application of micronization resulted in a sign ificant (P less than or equal to 0.05) improvement in AME(n), apparent protein digestibility (APD), and starch digestibility. The increments ranged from 19.4 to 31.3, 8.5 to 33.6, and 12.2 to 22.3% for AME(n), APD, and starch digestibility, respectively. In contrast, dehulling ha d little or no effect on AME(n) (3.0 and 4.9%), APD (-1.8 and -4.2%) a nd starch digestibility (2.0 and 1.3%) values of Impala (yellow-seeded ) and Radley (green-seeded) peas but significantly (P less than or equ al to 0.05) improved the AME(n) (24.1%), APD (26.8%), and starch diges tibility (12.1%) values of Sirius (brown-seeded) peas. Chick performan ce was evaluated in a 2-wk trial. Birds fed micronized peas grew faste r and had better feed conversion (P less than or equal to 0.05) than b irds fed untreated peas and the wheat-soybean control diet. Addition o f lysine to the diet containing micronized peas further improved (P gr eater than or equal to 0.05) weight gains and feed conversion of broil er chicks. Dehulling only improved (P less than or equal to 0.05) the performance of birds fed Sirius peas.