TITLE

RAPSŲ SĖKLŲ MAISTINĖ VERTĖ IR FITAZĖS, GAUTOS IŠ PHENIOPHORA LYCII KAMIENO, ĮTAKA MAISTINIŲ MEDŽIAGŲ PASISAVINIMUI VIŠČIUKUS BROILERIUS LESINANT SKIRTINGU RAPSŲ SĖKLŲ KIEKIU

AUTHOR(S)
Šašytė, Vilma; Gružauskas, Romas; Racevičitė-Stupelienė, Asta; Semaškaitė, Agila
PUB. DATE
September 2007
SOURCE
Veterinarija ir Zootechnika;2007, Vol. 39 Issue 61, p75
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The aim of performed work was to determine the nutritive value of rapeseed, its effect on productivity of broiler chickens, effect of Pheniophora lycii phytase (6-phytase) on utilization of calcium (Ca) and phosphorus (P) in broiler chickens fed diets with different amounts of rapeseed. The chemical composition of antinutritional compounds of rapeseed showed a high level of phytate P (5.08 mg/g DM) comprising 65.47% DM of the total P, low levels of glucosinolate - 7.96 μmol/g and erucic acid - 0.14%. The feeding test was performed with thirty two 14–49 day old ROSS 308 breed broiler chickens, which were divided randomly into 4 groups each of 8 birds. The results of the feeding test showed that increasing amount of rapeseed (2.5 #x2013;7.5%) in the broiler chickens diets with prolonged feeding test time, decreased the productivity of broiler chickens and increased feed conversion. In the metabolic experiment forty eight 21–34 day old ROSS 308 male broiler chickens were divided randomly into 6 groups. Each group consisted of 8 replications of 48 cages (one bird per cage). Broiler chickens in control (Groups 1, 3 and 5) were fed with wheatsoybean meal diet with different amount of rapeseed (2.5%, 5% and 7.5%). The experimental diets (Groups 2, 4 and 6) were supplemented with 6-phytase (750 FYT/kg) (produced from fungus Pheniophora lycii). The results of the metabolic experiment showed, that higher amount of rapeseed in the diet (7.5%) decreased the utilization of P and Ca, however, supplementation with 6-phytase compared to controls improved P and Ca utilization by 14.19 % and 4.08% (P<0.05), respectively. In conclusion, the results from this study indicate that the optimal concentration of rapeseed in broiler chickens diet is up to 5%.
ACCESSION #
27157154

 

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