中国畜牧兽医2017，Vol.44Issue(8)：2303-2310,8.DOI:10.16431/j.cnki.1671-7236.2017.08.013
不同精粗比日粮对雷州山羊体外瘤胃发酵的影响
Effects of Diets with Different Concentrate to Forage Ratios on in Vitro Rumen Fermentation of Leizhou Goats
摘要
Abstract
This study was conducted to study the effect of different ratios of concentrate to Pennisetum sinese Roxb in diet on in vitro rumen fermentation in Leizhou goats.In vitro fermentation method was used and diets with different concentrate to Pennisetum sinese Roxb were prepared which the ratio were 0:100(group Ⅰ),10:90(group Ⅱ),20:80(group Ⅲ),30:70(group Ⅳ)and 40:60(group Ⅴ),respectively,and the samples were analyzed after fermented for at 4,8,12,24 and 48 h.The results showed that:①With the increase of the concentration to roughage ratios,the crude protein content of TMR diets increased and the fiber material and crude ash contents decreased gradually.With the increase of concentration,the gas production at 4,8,24,48 h were extremely significantly increased(P<0.01).②With the increase of fermentation time and the concentration to roughage ratios,the pH of rumen fluid were decreased,and pH of groups Ⅳ and Ⅴ were significantly lower than groups Ⅰand Ⅱ at the same time(P<0.05).And the dry matter degradation were increased,and that of groups Ⅳ and Ⅴ were extremely significantly higher than groups Ⅰand Ⅱ at the same time(P<0.01).The NH3-N content at 48 h was higher than that at 4 h and there was no siginificant difference among groups at 4 and 24 h(P>0.05).③The correlation between pH and accumulated gas production,dry matter degradation rate were significantly or extremely significantly negative,that between accumulated gas production and dry matter degradation rate were significantly or extremely significantly positive(P<0.05;P<0.01).The correlation between pH and dry matter,crude ash,crude fiber,neutral detergent fiber and acid detergent fiber were significantly or extremely significantly positive,that with crude protein was significantly or extremely significantly negative(P<0.05;P<0.01).And the correlation between cumulated gas production,dry matter degradation rate and crude protein was significantly or extremely significantly positive,while that with the dry matter,crude ash,crude fiber,neutral detergent fiber and acid detergent fiber were significantly or extremely significantly negative(P<0.05;P<0.01).In summary,under the conditions of this test,the appropriate ratio of concentrate to Pennisetum sinese Roxb was 30:70 in which Leizhou goat could get a better fermentation effect and cost savings.关键词
雷州山羊/皇竹草/精粗比/瘤胃发酵/降解率Key words
Leizhou goat/Pennisetum sinese Roxb/concentrate to fortage ratio/rumen fermentation/degradation rate分类
农业科技引用本文复制引用
王志敬,吴征敏,庄桂锋,吴浩浩,江镒成,刘钊明,招华兴,尹福泉..不同精粗比日粮对雷州山羊体外瘤胃发酵的影响[J].中国畜牧兽医,2017,44(8):2303-2310,8.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）
舍饲条件下雷州山羊养殖关键技术研究与示范(2015A03029) （2015A03029）
舍饲雷州山羊全混合日粮(TMR)配方研制及应用(2016LM3189) （TMR）
广东省大学生创新实验项目(524000087206、CXXL2016048、201610566061) （524000087206、CXXL2016048、201610566061）
