Evaluation of the Addition of Humicola Grisea Cellulase to Broiler Chicken Rations for a 21-Day Period
Dênia Oliveira de Souza,
Cirano José Ulhoa,
Weslane Justina da Silva,
Denise Russi Rodrigues,
Nadielli Pereira Bonifácio,
Fabiana Ramos dos Santos,
Fabiano Guimarães Silva,
Cibele Silva Minafra
Affiliations
Dênia Oliveira de Souza
Goiano Federal Institute of Education Science and Technology (Instituto Federal Goiano—IF Goiano), Rio Verde 75901-970, Brazil
Cirano José Ulhoa
Department of Biochemistry and Molecular Biology, Biological Sciences Institute, University Federal of Goiás, Samambaia Campus, Goiânia 74690-631, Brazil
Weslane Justina da Silva
Department of Biochemistry and Molecular Biology, Biological Sciences Institute, University Federal of Goiás, Samambaia Campus, Goiânia 74690-631, Brazil
Denise Russi Rodrigues
Ohio State University, 1680 Madson Ave, Wooster, OH 44691, USA
Nadielli Pereira Bonifácio
Goiano Federal Institute of Education Science and Technology (Instituto Federal Goiano—IF Goiano), Rio Verde 75901-970, Brazil
Fabiana Ramos dos Santos
Goiano Federal Institute of Education Science and Technology (Instituto Federal Goiano—IF Goiano), Rio Verde 75901-970, Brazil
Fabiano Guimarães Silva
Goiano Federal Institute of Education Science and Technology (Instituto Federal Goiano—IF Goiano), Rio Verde 75901-970, Brazil
Cibele Silva Minafra
Goiano Federal Institute of Education Science and Technology (Instituto Federal Goiano—IF Goiano), Rio Verde 75901-970, Brazil
This study aimed to evaluate the addition of liquid cellulose, produced by Humicola grisea, in 21-day-old broiler chickens’ diets. The treatments comprised control rations of corn and soybean meal and rations to which 500 mL/t and 1000 mL/t of cellulase were added. A total of 180 male broiler chickens were used, distributed in a completely randomized design, with three treatments and six replicates. Broiler chicken performance was monitored during the period from 1 to 21 days old. Significant effects were detected for digestibility only between four and seven days old, when a reduced dry matter nitrogen intake was recorded, and for nitrogen digestibility in the broilers fed cellulase-supplemented rations at a dose of 1000 m/L. Among the analyzed digestive organs, only the biometrics of the large intestine were affected significantly at seven days old. The absolute weights of the liver and pancreas and the activities of amylase, alkaline phosphatase, and transaminases were not affected significantly, indicating that cellulase did not affect the metabolism of these organs. No significant effect was detected in the serum for electrolytes, total protein, or alkaline phosphatase. So, the addition of liquid cellulase produced by Humicola grisea did not affect performance and metabolism in 21-day-old broiler chickens.
