动物营养学报2018，Vol.30Issue(1)：393-402,10.DOI:10.3969/j.issn.1006-267x.2018.01.047
皇竹草与喷浆玉米皮组合效应的研究
Combination Effect of Pennisetum sinese Roxb and Spouting Corn Bran
摘要
Abstract
This experiment investigated to effects of the combinations of Pennisetum sinese Roxb and spouting corn bran in different proportions on rumen degradation rate of goats by using in vitro gas production method so as to provide theoretical basis and data support for scientific application of roughage resources in South China. According to the ratio of dry matter(DM),Pennisetum sinese Roxb and spouting corn bran were mixed in the ratios of 100:0,75:25,50:50,25:75 and 0:100 and divided into groupsⅠ, Ⅱ, Ⅲ, Ⅳ and Ⅴ, respective-ly, which were cultured for 4,8,12,24 and 48 hours by using in vitro gas production method, respectively. Three replicates and two blank controls were desgined in each time point. At the end of the culture,we stopped fermentation and determined liquid pH, ammoniacal nitrogen(NH3-N)concentration of fermentation liquid and the contents of DM, crude protein(CP)and neutral detergent fiber(NDF)in fermentation residue. The results showed as follows:1)the combinations of Pennisetum sinese Roxb and spouting corn bran in different proportions influenced pH and NH3-N concentration of fermentation liquid, but all variations were within nor-mal range. The pH of fermentation liquid was significantly decreased as the increase of the proportion of spou-ting corn bran(P<0.05). In 50% and 75% spouting corn bran groups(groups Ⅲ and Ⅳ), the NH3-N con-centration of fermentation liquid was significantly higher than that in single Pennisetum sinese Roxb group (group Ⅰ)at 12,24 and 48 h for in vitro fermentation(P<0.05). 2)At 8 and 48 h for in vitro fermenta-tion, the degradation rate of in vitro rumen DM was significantly increased with the increase of the proportion of spouting corn bran(P<0.05). In 50% and 75% spouting corn bran groups,the degradation rates of in vitro rumen NDF and CP were significantly higher than those in the single Pennisetum sinese Roxb group at 8,12, 24 and 48 h for in vitro fermentation(P<0.05). 3)The combined effects on the degradation rate of in vitro rumen DM were positive in the combinations of 75% Pennisetum sinese Roxb+25% spouting corn bran and 50% Pennisetum sinese Roxb+50% spouting corn bran, and the maximum positive combination effect value was found in the combination of 50% Pennisetum sinese Roxb+50% spouting corn bran at 24 h for in vitro fer-mentation; the combined effects on the degradation rate of in vitro rumen NDF was positive in the combination of 75% Pennisetum sinese Roxb+25% spouting corn bran,and the maximum positive combination effect value was obtained at 12 h for in vitro fermentation; the combined effects on the degradation rate of in vitro rumen CP was positive in 50% Pennisetum sinese Roxb+50% spouting corn bran, and the maximum positive combi-nation effect value was obtained at 8 h for in vitro fermentation. It is concluded that the optimal combination proportions of Pennisetum sinese Roxb and spouting corn bran are(75:25)to(50:50).关键词
皇竹草/喷浆玉米皮/瘤胃降解率/组合效应/体外产气法Key words
Pennisetum sinese Roxb/spouting corn bran/rumen degradation rate/combined effect/in vitro gas production method分类
农业科技引用本文复制引用
吴征敏,王志敬,于辉,吴浩浩,苏智杰,林敏纯,曾进,尹福泉,赵志辉..皇竹草与喷浆玉米皮组合效应的研究[J].动物营养学报,2018,30(1):393-402,10.基金项目
雷州山羊杂交改良技术创新(201201149) （201201149）
雷州山羊提纯复壮及杂交改良技术研究(2013A03009) （2013A03009）
舍饲条件下雷州山羊全混合日粮(TMR)的研制(2013A01042) （TMR）
2016年省级现代农业科技创新联盟建设项目(2016LM3191) （2016LM3191）
清远市清城区产学研合作专项资金项目(2015B03) （2015B03）
