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Titolo:
ENZYME SUPPLEMENTATION OF WHEAT-BASED DIETS FOR BROILERS - 1 - EFFECTON GROWTH-PERFORMANCE AND INTESTINAL VISCOSITY
Autore:
STEENFELDT S; MULLERTZ A; JENSEN JF;
Indirizzi:
DANISH INST AGR SCI,RES CTR FOULUM,DEPT ANIM NUTR & PHYSIOL,POB 50 DK-8830 TJELE DENMARK NOVO NORDISK AS,FOOD & FEED ENZYMES R&D DK-2880 BAGSVAERD DENMARK ROYAL VET & AGR UNIV,DEPT ANIM SCI & ANIM HLTH DK-1870 FREDERIKSBERG C DENMARK
Titolo Testata:
Animal feed science and technology
fascicolo: 1, volume: 75, anno: 1998,
pagine: 27 - 43
SICI:
0377-8401(1998)75:1<27:ESOWDF>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
APPARENT METABOLIZABLE ENERGY; NUTRITIVE-VALUE; CHICKEN DIETS; CELL-WALLS; RYE; PENTOSANS; BARLEY; DIGESTIBILITIES; ENDOSPERM; CEREALS;
Keywords:
WHEAT; ENZYME SUPPLEMENTATION; INTESTINAL VISCOSITY; PERFORMANCE; BROILER CHICKENS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
S. Steenfeldt et al., "ENZYME SUPPLEMENTATION OF WHEAT-BASED DIETS FOR BROILERS - 1 - EFFECTON GROWTH-PERFORMANCE AND INTESTINAL VISCOSITY", Animal feed science and technology, 75(1), 1998, pp. 27-43

Abstract

The influence of enzyme supplementation on performance and intestinalviscosity of male broiler chickens fed with diets containing high amount of wheat was examined in three experiments. In the first experiment, addition with an enzyme preparation including different cell wall degrading enzymes to diets containing 63 g kg(-1) and 72 g kg(-1) of wheat improved (P<0.05) feed conversion efficiency in the 72 g kg(-1) wheat diet. In addition, intestinal viscosity of chickens fed with the 72 g kg(-1) wheat diet was reduced (P<0.05). Weight gain and feed intake were not influenced by enzyme addition. In Experiments 2 and 3, the inclusion level of wheat in the diets was more than 80 g kg(-1) and four different enzyme preparations were used (two xylanase preparations,two mixed preparations). Overall, a significant effect on performanceand intestinal viscosity of chickens was obtained as a result of enzyme supplementation in both experiments. In the first 21 days, improvements (P<0.05) in weight gain and feed conversion efficiency were foundto be on average 5% and 6% in Experiment 2 and 7% and 8% in Experiment 3, respectively. When weight gain and feed conversion efficiency were examined on a weekly basis it was shown that the significant response of enzyme addition was confined to the first 4 weeks. However, the effect of enzyme supplementation was still significant in the whole period from 21-42 days. Feed intake was not influenced by enzyme addition. The viscosity of intestinal content in both the jejunum and ileum was in general reduced (P<0.05) with enzyme supplementation, the xylanase preparations proving to be the most efficient. It was concluded thatenzyme supplementation of wheat-based diets resulted in improved performance of broiler chickens, which was related to a concomitant reduction in intestinal viscosity. However, the response of enzyme supplementation was most pronounced in diets with a wheat content higher than 80 g kg(-1). (C) 1998 Elsevier Science B.V.

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Documento generato il 23/09/20 alle ore 08:17:24