动物营养学报2013，Vol.25Issue(8)：1791-1798,8.DOI:10.3969/j.issn.1006-267x.2013.08.017
不同中性洗涤纤维与淀粉比例饲粮对生长肉兔生产性能、盲肠发酵及胃肠道发育的影响
Effects of Different Neutral Detergent Fiber/Starch Ratio Diets on Performance, Caecum Fermentation and Gastrointestinal Development of Growing Rabbits
摘要
Abstract
An experiment was conducted to determine the effects of different neutral detergent fiber (NDF) /starch ratio diets on performance,caecum fermentation and gastrointestinal development of growing rabbits.A total of 200 35-day-old weanling rabbits were randomly assigned to 4 groups with 50 replicates in each group,and they were fed diets with the ratios of NDF/starch were 2.3 (NDF,336 g/kg DM; starch,145 g/kg DM;group Ⅰ),1.9 (NDF,306 g/kg DM; starch,164 g/kg DM; group Ⅱ),1.4 (NDF,273 g/kg DM;starch,192 g/kg DM; group Ⅲ) and 1.0 (NDF,250 g/kg DM ; starch,250 g/kg DM ; group Ⅳ),respectively.The trial lasted for 7 days for adaptation,and 40 days for experiment.The results showed as follows:the ratio of NDF/starch had significant influences on average daily gain (ADG) and feed/gain (F/G) (P ＜0.05),but had no significant influence on average daily feed intake (ADFI) (P ＞ 0.05).With the NDF level decreasing and starch level increasing,the ADG was firstly increased and then decreased,while the F/G had an opposite change,and the largest ADG (23.59 g/d) and the lowest F/G (2.93) were found in group Ⅱ.Average diarrhea day of trial rabbits was significantly decreased with the NDF level increasing (P ＜ 0.01).The values of stomach weight (SW),small intestine weight (SIW),caecum weight (CW) and small intestine length (SIL) in group Ⅱ were all the largest (longest) among all groups,and the ratio of NDF/starch had a significant influences on SW and SIW (P ＜ 0.05).The ratio of NDF/starch had a significant influence on propionic acid content in cecal digesta (P ＜ 0.05),but had no significant influence on pH,ammonia nitrogen concentration,acetic acid content,butyric acid content and acetic acid/(propionic acid + butyric acid) in cecal digesta (P ＞ 0.05).The propionic acid content in cecal digesta in groups Ⅱ and Ⅲ was significantly higher than that in groups Ⅰ and Ⅳ (P ＜ 0.05).The ratio of NDF/starch had significant influence on duodenum villous height (P ＜ 0.01),but had no significant influence on duodenum and villous height/crypt depth (P ＞0.05).And duodenum villous height was the longest in group Ⅱ (851 μm),which was significantly higher than that in other groups (P ＜ 0.01).Based on a comprehensive consideration of measured indices,the appropriate NDF level,starch level and NDF/starch ratio in the diet of growing rabbits are 305.7 g/kg DM,163.8 g/kg DM and 1.9,respectively.关键词
中性洗涤纤维/淀粉/肉兔/生产性能/盲肠发酵/胃肠道发育Key words
neutral detergent fiber/ starch/ meat rabbit/ performance/ caecum fermentation/ gastrointestinal development分类
农业科技引用本文复制引用
朱岩丽,李福昌,王春阳,王雪鹏..不同中性洗涤纤维与淀粉比例饲粮对生长肉兔生产性能、盲肠发酵及胃肠道发育的影响[J].动物营养学报,2013,25(8):1791-1798,8.基金项目
现代农业产业技术体系建设专项(CARS-44-B-1) （CARS-44-B-1）
国家公益性行业(农业)科研专项(2000903006) （农业）
