Improvement in the Nutritional Value of Barley for Chicks by Enzyme Supplementation

Jensen, L. S.; Fry, Ramon E.; Allred, John B.; McGinnis, James

doi:10.3382/ps.0360919

Cited by 92 publications

(31 citation statements)

References 5 publications

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“…However the present study and earlier ones (Jensen et al, 1957;Fry et al, 1958;Willingham et al, 1959;Burnett, 1966) (Shapiro et al, unpublished results). Lack of effect on performance cannot be attributed to inactivation of the enzymes in the digestive tract, because some significant effects of enzyme supplementation were observed in the GIT.…”

Section: Supplemented Enzyme Effectscontrasting

confidence: 53%

“…Early studies showed a beneficial effect of using crude amylase and protease preparations (Jensen et al, 1957;Fry et at, 1958; Burnett, 1966) which were later attributed to the p-giucanase activity found in these preparations (Rickes etal, 1962 (Nitsan et al, 1974) and was expressed as glucose produced per min from starch per milligram of enzyme preparation. The values were 0.38 and 0.96 mg in El and EII, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks

Mahagna¹,

Nir²,

Larbier³

et al. 1995

Reprod. Nutr. Dev.

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Summary― Day-old male meat-type chicks were fed a commercial starter diet supplemented with 2 levels of enzyme preparations containing amylase and proteases up to 14 d of age. Enzyme supplementation had no significant effect on feed intake or growth rate, and was accompagnied by a significant decrease in gizzard content and small intestine weight. The intestine contents increased and this increase was accompanied by a significant decrease in its pH. Enzyme supplementation depressed the activity of chymotrypsin in the pancreas and the'activity of amylase, trypsin and chymotrypsin in the intestinal contents. Some carry-over effects were observed on d 42, 4 weeks after the cessation of the enzyme supplements. These were mainly a significant depression in the activity of trypsin in the intestinal contents. In a balance study, diets supplemented with 0, 250 and 1 000 pg/kg enzyme preparations were supplied. Exogenous enzyme supplements had no significant effect on the digestibility of all the nutrients studied except for the highest level of enzyme supplementation, which improved slightly but consistently the digestibility of amino acids. Some age effects were observed, mainly a decrease in the digestibility of fat and starch, and in the ME of the diet from weeks 1 to 2 followed by an increase during week 3. Protein digestibility and retention of nitrogen decreased with age.

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Section: Supplemented Enzyme Effectscontrasting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks

Mahagna¹,

Nir²,

Larbier³

et al. 1995

Reprod. Nutr. Dev.

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“…The birds do not produce an enzyme in their gastrointestinal tract to depolymerize the (1, 3-1, 4)-␤-glucans, and this leads to a high viscosity of the feed in the intestine, a limited uptake of nutrients, and sticky droppings adhering to the chickens and the floors of the production cages (36,37). Inclusion of fungal enzyme preparations or purified (1, 3-1, 4)-␤-glucanase from Bacillus amyloliquefaciens to barley diets can overcome the nutritional deficiencies of barley grain and prevent the occurrence of sticky droppings (38,39). The increased thermostability of the hybrid enzyme expressed in the transgenic barley grains has a half-life at 70°C of more than 4 hr compared with the half-life of 6 min for the parent enzymes (40).…”

Section: Discussionmentioning

confidence: 99%

The production of recombinant proteins in transgenic barley grains

Horvath

Huang

Wong

et al. 2000

Proc. Natl. Acad. Sci. U.S.A.

181

113

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“…Enzyme supplementation as a feed additive has become common since last four decades (Jensen et al 1957;Chesson 1993). Advances in enzyme biotechnology and knowledge of substrates have led to the development of non-starch polysaccharide (NSP) degrading enzymes, such as glucanase and xylanase, which are capable of improving metabolizable energy (ME) of viscous grains, such as wheat and barley.…”

Section: Introductionmentioning

confidence: 99%

Effects of a multi-enzyme on performance and carcass characteristics of broiler chickens fed corn-soybean meal basal diets with different metabolizable energy levels

Gitoee

Janmohammadi

Taghizadeh

et al. 2014

Journal of Applied Animal Research

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A 4 × 3 factorial experiment was designed to study the effects of a multi-enzyme (Avizyme 1502; combination of xylanase, α-amylase and protease) in three levels (0, 250, 500 mg/kg) on performance and carcass characteristics of broiler chickens fed corn-soybean meal diets with different levels of metabolizable energy (ME; 13.18; 12.34; 11.93 and 11.51 MJ/kg) from 1 to 49 days of age. Results showed that dietary treatments had no significant effect (P > 0.05) on feed intake at 10 days and 24 days but birds fed diets containing 13.18 MJ/kg ME with 500 mg/kg multi-enzyme consumed more feed than birds fed diets with 11.51 MJ/kg ME and 250 mg/kg multi-enzyme (P < 0.05) at 49 days. Average daily gain in starter (1-10 days) and finisher (25-49 days) periods was affected by interaction between ME and enzyme. No significant differences (P > 0.05) were observed for feed conversion ratio (FCR) in grower period, although dietary treatments affected FCR in starter and finisher phases. At 49 days of age, the best FCR obtained for birds fed diets containing 13.18 MJ/kg ME and 250 mg/kg multi-enzyme. The highest FCR was for birds fed a diet with 11.51 MJ/kg ME with 250 mg/kg multi-enzyme. Breast, thigh and liver were significantly affected by dietary treatments. A diet with 13.18 MJ/kg ME and 500 mg/kg multi-enzyme resulted in the highest breast and thigh yield (P < 0.05). It can be concluded that adding enzymes to corn-soy based diets allowed the reduction in the energy level of broiler diets without any negative effects on performance of broiler chickens.

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Improvement in the Nutritional Value of Barley for Chicks by Enzyme Supplementation

Cited by 92 publications

References 5 publications

Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks

Effect of age and exogenous amylase and protease on development of the digestive tract, pancreatic enzyme activities and digestibility of nutrients in young meat-type chicks

The production of recombinant proteins in transgenic barley grains

Effects of a multi-enzyme on performance and carcass characteristics of broiler chickens fed corn-soybean meal basal diets with different metabolizable energy levels

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