首页>
中文期刊>
《畜牧与生物技术杂志:英文版》
>Effect of dietary nonphytate phosphorus on laying performance and small intestinal epithelial phosphate transporter expression in Dwarf pink-shell laying hens
Effect of dietary nonphytate phosphorus on laying performance and small intestinal epithelial phosphate transporter expression in Dwarf pink-shell laying hens
This study examined the effects of various levels of dietary nonphytate phosphorus on laying performance and the expression patterns of phosphorus metabolism related genes in Dwarf pink-shell laying hens.A total of 40528-week-old Dwarf pink-shell laying hens were fed the same corn-soybean basal meals but containing 0.20%,0.25%,0.30%,0.35%or 0.40%nonphytate phosphorus.The results showed that feed intake,egg production,and average egg weights were quadratically correlated with dietary nonphytate phosphorus content(P< 0.05),and the highest egg production,feed intake and average egg weights were achieved when dietary nonphytate phosphorus was at 0.3%(P< 0.05).mRNA expression of intestinal sodium phosphorus co-transporter linearly decreased when dietary nonphytate phosphorus increased.mRNA and protein expression of intestinal calbindin and vitamin D receptor correlated quadratically with dietary nonphytate phosphorus,and the highest expression was found when dietary available phosphorus was at 0.25%to 0.3%.In conclusion,the ideal phosphorus requirement for Dwarf pink-shell layer hens is estimated to be 0.3%in a corn-soybean diet.With this level of phosphorus supplementation,calbindin and vitamin D receptor reached their highest expression.
展开▼