动物营养学报2019，Vol.31Issue(6)：2891-2897,7.DOI:10.3969/j.issn.1006⁃267x.2019.06.050
不同饲粮能量结构对后备母猪初情日龄、血清代谢产物和激素浓度的影响
Effects of Different Dietary Energy Structures on Age of Puberty, Serum Metabolite and Hormone Concentrations of Replacement Gilts
摘要
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 ener?gy 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 a?mong groups ( P＞0.05). The serum triglyceride, total cholesterol and glucose concentrations were not signifi?cantly 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 in?creasing 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 hor?mone, and go against the onset of puberty of gilts.[ Chinese Journal of Animal Nutrition, 2019, 31 ( 6) :2891?2897]关键词
能量结构/后备母猪/初情日龄/代谢产物/激素分泌Key words
energy structure/replacement gilts/age of puberty/metabolites/hormone secretion分类
农业科技引用本文复制引用
林长光,刘景,刘亚轩,方桂友,缪伏荣,叶鼎承,李忠荣,董志岩..不同饲粮能量结构对后备母猪初情日龄、血清代谢产物和激素浓度的影响[J].动物营养学报,2019,31(6):2891-2897,7.基金项目
福建省科技重大专项专题(2012NZ0003⁃3) （2012NZ0003⁃3）
福建省公益类科研院所基本科研专项(2015R1023⁃4) （2015R1023⁃4）
