Genotypic and environmental differences in extract viscosity of barley and their relationship to its nutritive value for broiler chickens

Campbell, Graham; Rossnagel, B. G.; Classen, H. L.; Thacker, P. A.

doi:10.1016/0377-8401(89)90036-9

Cited by 79 publications

(34 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several studies have shown that the addition of b-glucanase to chicken diets may degrade endosperm cell walls, resulting in increased digestibility of nutrients which otherwise may be encapsulated in the cell structures (Hesselman and Aman 1986;Bergh et al 1999). The improvement of chicken performance on diets supplemented with enzymes are caused by the breakdown of the fibre components into smaller polymers (de Silva et al 1983), rather than complete hydrolysis of the polysaccharides and absorption of released sugars (White et al 1983;Campbell et al 1989). The beneficial effect of the use of exogenous enzymes in the present study on FCR was observed only in quail that received a diet containing untreated wheat.…”

Section: Carcassmentioning

confidence: 99%

The effects of dry heat processing, autoclaving and enzyme supplementation on the nutritive value of wheat for growing Japanese quails

Kianfar

Moravej

Shivazad

et al. 2013

Journal of Applied Animal Research

View full text Add to dashboard Cite

Two experiments were conducted to study the effect of autoclaving and heat processing (HP) and enzyme supplementation on wheat nutritive value for quails. In the first experiment, 72 male quails (13 weeks) were used to determine apparent metobalisable energy corrected for nitrogen (AMEn) of wheat samples. In the second experiment, 720 seven-day-old as-hatched Japanese quail were randomly assigned to a 3 )3 factorial design. Factors include three processing methods (untreated, autoclaving and HP) and three levels of enzyme (0, 0.25 and 0.5 g/kg). Each treatment group consisted of 4 replicates of 20 birds. According to the results, the total and insoluble none starch polysaccharides (NSP) and insoluble to soluble NSP ratio increased by processing (PB0.01) and also total and insoluble b-glucan increased by processing (PB0.01). The amount of AME, AMEn, gross energy efficiency and dry matter digestibility of wheat has significantly increased by autoclaving (P B0.05). Quails performance was increased by wheat autoclaving (PB0.05). However, wheat dry heat processing had no significant effect on performance. Adding enzyme to diet significantly improved quails performance. By autoclaving wheat, carcass and breast weight significantly increased (PB0.05). Adding enzyme to diet significantly increased breast and thigh weight (P B0.05). In conclusion, we can use autoclaving, in spite of enzyme supplementation, to improve growth rate and feed conversion ratio of growing quail fed diets based on wheat.

show abstract

Section: Carcassmentioning

confidence: 99%

The effects of dry heat processing, autoclaving and enzyme supplementation on the nutritive value of wheat for growing Japanese quails

Kianfar

Moravej

Shivazad

et al. 2013

Journal of Applied Animal Research

View full text Add to dashboard Cite

show abstract

“…Pigs, especially piglets, do not produce enzymes that can degrade the cell wall and NSP in barley. So β-glucan and arabinoxylan in barley may interfere with digestion and absorption of nutrients [7] , even the production of digestive enzymes [8,9] . Studies have shown that mix-linked β-glucan and arabinoxylan are easily hydrolyzed by β-glucanases and xylanases respectively.…”

Section: Introductionmentioning

confidence: 99%

Effects of non-starch polysaccharides enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley

Li¹,

Feng²,

Xu³

et al. 2004

WJG

View full text Add to dashboard Cite

AIM:To investigate effects of non-starch polysaccharides(NSP) enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley. METHODS:Sixty crossbred piglets averaging 13.5 kg were randomly assigned to two treatment groups with three replications (pens) based on sex and mass. Each group was fed on the diet based on barley with or without added NSP enzymes (0.15%) for a 40-d period. At the end of the experiment the pigs were weighed. Three piglets of each group were chosen and slaughtered. Pancreas, digesta from the distal end of the duodenum and jejunal mucosa were collected for determination. Activities of the digestive enzymes trypsin, chymotrypsin, amylase and lipase were determined in the small intestinal sections as well as in homogenates of pancreatic tissue. Maltase, sucrase, lactase and γ-glutamyl transpeptidase (γ-GT) activities were analyzed in jejunal mucosa. RESULTS:Supplementation with NSP enzymes improved growth performance of piglets. It showed that NSP enzymes had no effect on digestive enzyme activities in pancreas, but decreased the activities of proteolytic enzyme, trypsin, amylase and lipase in duodenal contents by 57.56%, 76.08%, 69.03% and 40.22%(P<0.05) compared with control, and increased γ-GT activities in jejunal mucosa by 118.75%(P<0.05). CONCLUSION:Supplementation with NSP enzymes in barley based diets could improve piglets' growth performance, decrease activities of proteolytic enzyme, trypsin, amylase and lipase in duodenal contents and increase γ-GT activities in jejunal mucosa.Li WF, Feng J, Xu ZR, Yang CM. Effects of non-starch polysaccharides enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley.

show abstract

“…The enzymes are also widely used as a feed additive to reduce viscosity of the chyme, which is often caused by β-1,3-1,4-glucan in diets (Campbell et al 1989).…”

mentioning

confidence: 99%

Codon optimization, expression and characterization of Bacillus subtilis MA139 β-1,3-1,4-glucanase in Pichia pastoris

et al. 2010

View full text Add to dashboard Cite

β-1,3-1,4-Glucanase has been broadly used in feed and brewing industries. According to the codon bias of Pichia pastoris, the Bacillus subtilis MA139 β-1,3-1,4-glucanase gene was de novo synthesized and expressed in P. pastoris X-33 strain under the control of the alcohol oxidase 1 promoter. In a 10-L fermentor, the β-1,3-1,4-glucanase was overexpressed with a yield of 15,000 U/mL by methanol induction for 96 h. The recombinant β-1,3-1,4-glucanase exhibited optimal activity at 40• C and pH 6.4. The activity of the recombinant β-1,3-1,4-glucanase was not significantly affected by various metal ions and chemical reagents. To our knowledge, the expression of this β-1,3-1,4-glucanase from Bacillus sp. in P. pastoris is in relatively high level compared to previous reports. These biochemical characteristics suggest that the recombinant β-1,3-1,4-glucanase has a prospective application in feed and brewing industries.

show abstract

Genotypic and environmental differences in extract viscosity of barley and their relationship to its nutritive value for broiler chickens

Cited by 79 publications

References 18 publications

The effects of dry heat processing, autoclaving and enzyme supplementation on the nutritive value of wheat for growing Japanese quails

The effects of dry heat processing, autoclaving and enzyme supplementation on the nutritive value of wheat for growing Japanese quails

Effects of non-starch polysaccharides enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley

Codon optimization, expression and characterization of Bacillus subtilis MA139 β-1,3-1,4-glucanase in Pichia pastoris

Contact Info

Product

Resources

About