不同比例百香果皮对发酵型全混合日粮品质和干物质消化率的影响

Effect of different proportions of passion fruit peel on quality and dry matter digestibility of fermented total mixed ration

试验旨在探究不同比例百香果皮对发酵全混合日粮(FTMR)发酵品质和干物质消化率的影响。试验设定FTMR粗精比为7∶3,粗蛋白含量理论值为13%。各处理组百香果皮分别替代0(对照组,T0)、5%(T1)、10%(T2)和15%(T3)的王草。密封发酵60 d,使用体外瘤胃液培养方法测定干物质消化率及瘤胃发酵参数。结果表明:各处理组pH值、乙酸含量和氨态氮/总氮无显著差异(P>0.05),添加5%、10%和15%百香果皮的FTMR的乳酸含量均显著升高(P<0.05)。经6 h体外培养后,各组瘤胃液pH值在6.970~6.997之间(P>0.05)。当百香果皮添加量达到15%(T3)时,瘤胃产气量和干物质消化率均达到最高。研究表明,百香果皮可以作为发酵全日粮中的优质原料,具有促进发酵和提升干物质消化率的效果,添加量最高可达15%。

The study aimed to investigate the effects of different proportions of passion fruit peel on the fermentation quality and the dry matter digestibility of fermented total mixed ration(FTMR).The experiment set the ratio of roughage to concentrate in FTMR at 7∶3,with a theoretical crude protein content of 13%.In each treatment group,passion fruit peel was used to replace King grass by 0(control group,T0),5%(T1),10%(T2),and 15%(T3).After 60 days of sealed fermentation,the dry matter digestibility and ruminal fermentation parameters were determined using in vitro ruminal fluid culture methods.The results showed that there were no significant differences in pH values,acetic acid,and the ratio of ammonia nitrogen to total nitrogen among the treatment groups(P>0.05).The lactic acid content in FTMR with the addition of 5%,10%,and 15%passion fruit peel was significantly increased(P<0.05).After 6 hours of in vitro culture,the ruminal fluid pH values of all groups were between 6.970 and 6.997(P>0.05).When the addition amount of passion fruit peel is 15%(T3),the rumen gas production and dry matter digestion rate reach the highest level.The study suggests that passion fruit peel can be used as a high-quality raw material in fermented total mixed rations,which has the effect of promoting fermentation and improving dry matter digestibility,with the maximum addition amount reaching up to 15%.