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Effect of high zinc diets on serum hormone levels in early weanling stress piglets

Liu Li

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Abstract

One hundred Duroc ×Landrace×Yorkshire crossbred weanling piglets(26±2 days of age) were randomly divided into 5 groups with 20 piglets each by weight and sex,fed with basal diet,basal diet plus(2 000) or 3 000 mg·kg~(-1) zinc(from ZnO),and basal diet plus 250 or 500 mg·kg~(-1) zinc(from Zn-Met) respectively.The trial was conducted for 14 d.Blood samples were taken from the anterior vena cava for measuring some serum hormone levels.The results indicated that serum GH,INS,IGF-I,T_3 levels of weanling stress piglets decreased,and serum cortisol levels increased significantly,and high zinc diets increased serum GH,INS,IGF-I and T_3 levels significantly.The results suggested that high zinc diet could inhibit weanling stress and modulate growth-promoting hormone axis of piglets.

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What this paper is about

One hundred Duroc ×Landrace×Yorkshire crossbred weanling piglets(26±2 days of age) were randomly divided into 5 groups with 20 piglets each by weight and sex,fed with basal diet,basal diet plus(2 000) or 3 000 mg·kg~(-1) zinc(from ZnO),and basal diet plus 250 or 500 mg·kg~(-1) zinc(from Zn-Met) respectively.The trial was conducted for 14 d.Blood samples were taken from the anterior vena cava for measuring some serum hormone levels.The results indicated that serum GH,INS,IGF-I,T_3 levels of weanling stress piglets decreased,and serum cortisol levels increased significantly,and high zinc diets increased serum GH,INS,IGF-I and T_3 levels significantly.The results suggested that high zinc diet could inhibit weanling stress and modulate growth-promoting hormone axis of piglets.

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Available abstract

One hundred Duroc ×Landrace×Yorkshire crossbred weanling piglets(26±2 days of age) were randomly divided into 5 groups with 20 piglets each by weight and sex,fed with basal diet,basal diet plus(2 000) or 3 000 mg·kg~(-1) zinc(from ZnO),and basal diet plus 250 or 500 mg·kg~(-1) zinc(from Zn-Met) respectively.The trial was conducted for 14 d.Blood samples were taken from the anterior vena cava for measuring some serum hormone levels.The results indicated that serum GH,INS,IGF-I,T_3 levels of weanling stress piglets decreased,and serum cortisol levels increased significantly,and high zinc diets increased serum GH,INS,IGF-I and T_3 levels significantly.The results suggested that high zinc diet could inhibit weanling stress and modulate growth-promoting hormone axis of piglets.

Key concepts: Weanling, Basal (medicine), Internal medicine, Endocrinology, Zinc, Crossbreed, Hormone, Biology

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