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Dietary effects on content of hepatic lipid, plasma minerals, and tissue ascorbic acid in hens and estrogenized chicks



Dietary effects on content of hepatic lipid, plasma minerals, and tissue ascorbic acid in hens and estrogenized chicks



Poultry Science 64(5): 947-954



The purpose of this study was to determine if plasma mineral levels and plasma or hepatic ascorbic acid would be affected by the composition of the diet fed to chickens with higher circulating estrogen levels. Three wk-old broiler chicks were implanted with estradiol dipropionate to give estimated release rates of 0, 3.2 and 8.0 .mu.g/bird per day. The chicks were fed a corn-soy diet (CS) or a diet containing 5% fish meal, 5% alfalfa meal and 10% torula yeast (FAY). The FAY diet resulted in significantly lower hepatic lipid and plasma Fe, Cu, Mg and Zn in chicks administered the highest level of estrogen. In 2 experiments, laying hens were fed CS or diets containing fish mean (FM), alfalfa mean (AM), distillers dried grains with solubles (DDGS) or wheat-soy (WS) for 4 wk. In the 1st experiment, liver lipid content was not significantly affected by diet composition, but plasma Fe was significantly reduced by the AM, DDGS and WS diets. No significant effects of Cu, Mg and Zn in plasma were observed among the dietary treatments. In the 2nd experiment, relative liver weight was significantly reduced with the AM, DDGS and WS diets and liver lipid by the AM diet. Plasma Fe levels were significantly reduced by feeding all diets compared with the CS diet, but no significant differences in total Fe binding capacity were observed. Plasma and hepatic ascorbic acid were significantly increased by the AM, DDGS and WS diets, but no significant differences in hepatic ascorbic acid were observed when calculated/unit fat-free dry matter. Significant correlations were observed between plasma Fe or ascorbic acid and relative liver fat. Diet composition influenced the plasma Fe response to exogenous (chicks) or endogenous (hens) estrogen. A correlation of lower plasma ascorbic acid and higher Fe levels with higher hepatic lipid accumulation in hens was seen.

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Accession: 005148215

Download citation: RISBibTeXText

PMID: 4001076

DOI: 10.3382/ps.0640947


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