动物营养学报2016，Vol.28Issue(8)：2630-2638,9.DOI:10.3969/j.issn.1006-267x.2016.08.036
补喂来曲唑对速步马运动性能、血浆抗氧化指标与激素水平及体重的影响
Effects of Supplemental Feeding Letrozole on Athletic Performance, Plasma Antioxidant Indices and Hormone Levels, and Body Weight of Trotters
摘要
Abstract
This experiment aimed to study the effects of supplemental feeding letrozole on athletic perform⁃ance, plasma antioxidant indices and hormone levels, and body weight of trotters. Ten health Yili male horse with 2.5 years old and the average body weight of (398.16±25.34) kg, and similar performance based on strict training were randomly divided into 2 groups ( control group and trial group ) , and each group had 5 horse. Each horse was fed with 10 kg mixed pasture and 3 kg pelleted concentrate every day, based on this, each horse of trail group was fed with 5 mg/d letrozole, and 30 d supplemental feeding experiment and training experiment were conducted. At days 0, 10, 20 and 30 of the experiment, blood samples were collected in the morning from jugular vein to determine the levels of hormones. Body weight was recorded at days 0 and 30 be⁃fore ingestion in the morning. The 1 000 m trot training race was carried at days 0 and 30, and blood samples were collected from jugular vein at 1 h before the race, the end of the race, 20 min after the race and 2 h after the race to determine the plasma antioxidant indices and blood acid⁃base degree related indices. The results showed as follows:supplemental feeding letrozole could increase the performance of 1 000 m trot training race of trotters. The enzyme activities of catalase ( CAT) , glutathion peroxidase ( GSH⁃Px) , superoxide dismutase ( SOD) , the total antioxidant capacity ( T⁃AOC) and the content of uric acid ( UA) in plasma in trial group were higher than those in control group at 2 h after the race, and the activity of GSH⁃Px and T⁃AOC reached extremely significant (P<0.01) and significant level (P<0.05), respectively, while the malondialdehyde (MDA) in plasma in trial group was significantly lower than that in control group(P<0.05). In aspect of blood acid⁃base degree related indices, the content of HCO-3 in blood in trial group was lower than that in con⁃trol group ( P>0.05) , while the BEecf and pH in blood in trial group were higher than those in control group ( P>0.05) at the end of the race, 20 min after the race and 2 h after the race. The levels of testosterone ( T) and androstenediol ( AD) in plasma at days 10, 20 and 30 of the experiment in trial group were higher than those in control group ( P>0.05) . In addition, supplemental feeding letrozole could increase the body weight. Therefore, supplemental feeding 5 mg/( horse · d ) letrozole for trotters can shorten the using time of the 1 000 m trot training race, increase the antioxidant ability, the acid buffering capacity, the levels of T and AD in plasma and the body weight.关键词
来曲唑/速步马/运动性能/抗氧化指标/激素/体重Key words
letrozole/trotters/athletic performance/antioxidant indices/hormone/body weight分类
农业科技引用本文复制引用
马军,李晓斌,邓海峰,赵芳,杨开伦..补喂来曲唑对速步马运动性能、血浆抗氧化指标与激素水平及体重的影响[J].动物营养学报,2016,28(8):2630-2638,9.基金项目
新疆维吾尔自治区重大科技专项（201130101）；新疆维吾尔自治区研究生科研创新项目 （）
