检索结果-南通市图书馆

The Effect of dietary nutrient density on Growth Performance, Physiological Parameters, and Small Intestinal Type IIb Sodium Phosphate Co-transporter Expression in Broilers

引用

Journal of Animal Science and Biotechnology 2011年第2期2卷 102-110页

作者： Sidoeun Bun State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University

A 3 × 4 factorial experiment was con- ducted to determine the effect of dietary nutrient den- sity on growth performance, physiological parame- ters, and small intestinal epithelial phosphate trans- porter expression in broiler chicks fed different dietary nutrient density （DND） and non-phytate phosphorus （NPP） levels. dietary energy densities used had ME values of 2,850, 2,950, and 3,050 kcal/kg of diet and the NPP levels were 0.35%, 0.40%, 0.45%, and 0.50% within each ME value. Crude protein and essential amino acids levels were maintained propor- tionally to dietary ME levels. Each of the twelve diets was fed to five pens of seven male broiler chicks from 1 to 21 days of age. Broiler growth performance, ser- um physiological parameters, 1-hydroxylase activity in the kidney, type-IIb sodium phosphate co-trans- porter （NaPi-IIb）, and vitamin D receptor （VDR） expression levels in the duodenal mucosa were deter- mined. Our results showed that an increase in dietary nutrient density increased body weight and improved feed conversion. Additionally, serum parathyroid hormone concentration, 1-a-hydroxylase activity in the kidney, NaPi-IIb mRNA expression and VDR protein expression in the duodenal mucosa increased as DND increased. Feed intake and body weight in- creased as NPP levels increased. Serum parathyroid hormone, VDR and NaPi-IIb gene expression also in- creased as the level of NPP in the diet increased at the medium range level. The results of this study suggest that high DND can increase small intestinal type IIb sodium dependent phosphate co-transporter mRNA expression by up-regulating parathyroid hormone and activation of 1-ot-hydroxylase activity which might be in consistent with high growth rate of broilers. Small intestinal NaPi-IIb mRNA expression increases linear- ly only within the range of dietary NPP dosage levels close to the requirement recommended in the broilers feeding standards.

关键词： broiler dietary nutrient density intestinal phosphate transporter non-phytate phosphorus

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：