Effects of Different Dietary Energy Structures on Age of Puberty, Serum Metabolite and Hormone Concentrations of Replacement Gilts

LIN Changguang, LIU Jing, LIU Yaxuan, FANG Guiyou, MIAO Furong, YE Dingcheng, LI Zhongrong, DONG Zhiyan

doi:10.3969/j.issn.1006-267x.2019.06.050

2019 , Vol. 31 >Issue 6: 2891 - 2897

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.06.050

Molecular Nutrition

Effects of Different Dietary Energy Structures on Age of Puberty, Serum Metabolite and Hormone Concentrations of Replacement Gilts

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1. Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou 350013, China;
2. Fujian Guanghua Best Eco-Agriculture Development Co., Ltd., Fuzhou 350003, China

Received date: 2018-11-16

Online published: 2019-06-17

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Abstract

This experiment was conducted to investigate the effects of different dietary energy structures on age of puberty, serum metabolite and hormone concentrations of replacement gilts. Ninety Landrace×Large White replacement gilts with an initial body weight of (61.97±4.37) kg and similar body condition were allocated to 3 groups with 5 replicates per group and 6 gilts per replicate. Gilts in the 3 groups were fed three different energy structure diets of iso-energetic and iso-nitrogenous. The diet of group 1 contained 49.70% starch, 2.81% ether extract (EE) and 8.95% neutral detergent fiber (NDF), the diet of group 2 contained 43.52% starch, 5.68% EE and 12.53% NDF, and the diet of group 3 contained 37.13% starch, 8.73% EE and 16.02% NDF. The results showed that with the decrease of starch and the increase of EE and NDF in diets, backfat thickness of gilts had trended down, but the difference was not significant among groups (P>0.05); the age of puberty in group 1 was the least, but the difference was not significant among groups (P>0.05); the estrus ratio in groups 1 and 2 was 10 percentage points higher than that in group 3, but the difference was not significant among groups (P>0.05). The serum triglyceride, total cholesterol and glucose concentrations were not significantly affected by different dietary energy structures (P>0.05). The serum insulin growth factor-Ⅰ, leptin and luteinizing hormone concentrations in group 1 were significantly higher than those in group 3 (P<0.05), and the serum gonadotropin-releasing hormone concentration in group 1 was significantly higher than that in groups 2 and 3 (P<0.05). There were no significant differences in serum insulin, estradiol and follicle-stimulating concentrations among groups (P>0.05). The results indicate that excessively decreasing the starch level and increasing the levels of EE and NDF in diets have effects on the secretion of serum metabolic hormones insulin growth factor-Ⅰ, leptin and serum reproductive hormone luteinizing hormone and gonadotropin-releasing hormone, and go against the onset of puberty of gilts.

Key words： energy structure; replacement gilts; age of puberty; metabolites; hormone secretion

Cite this article

LIN Changguang, LIU Jing, LIU Yaxuan, FANG Guiyou, MIAO Furong, YE Dingcheng, LI Zhongrong, DONG Zhiyan . Effects of Different Dietary Energy Structures on Age of Puberty, Serum Metabolite and Hormone Concentrations of Replacement Gilts[J]. Chinese Journal of Animal Nutrition, 2019 , 31(6) : 2891 -2897 . DOI: 10.3969/j.issn.1006-267x.2019.06.050

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