不同精粗比下柚子皮与苜蓿配比对绵羊饲粮组合效应影响  

Effects of the proportion of pomelo peel and alfalfa in different concentrate-roughage ratios on the associative effects of diets in vitro

作　　者：袁玖[1] 唐德富[1] 万欣杰 朱宝珍 何天乐 俞海山 王军军 YUAN Jiu;TANG De- fu;WAN Xin- jie;ZHU Bao- zhen;HE Tian -le;YU Hai- shan;WANG Jun- jun(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;Lanzhou Federal Feed Limited Company,Lanzhou 730060,China)

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070 [2]兰州联邦饲料有限公司,甘肃兰州730060

出　　处：《草业学报》2018年第6期188-196,共9页Acta Prataculturae Sinica

基　　金：甘肃农业大学盛彤笙基金项目(GSAU-STS-1617);甘肃农业大学省级大学生创新创业训练计划项目(2017-111);甘肃省科技厅自然基金B类项目(1610RJZA084);优质胴体生产和羊肉品质提升技术研究及饲料产品开发(1602NKDH020-04)资助

摘　　要：为了探讨不同精粗比(concentrate∶roughage,C∶R)下柚子皮与苜蓿配比对绵羊饲粮组合效应的影响,采用体外产气法测定。C∶R在20∶80下,柚子皮∶苜蓿为80∶0,70∶10,60∶20,50∶30,40∶40,30∶50,20∶60,10∶70,0∶80组合;C∶R在30∶70下,柚子皮∶苜蓿为70∶0,60∶10,50∶20,40∶30,30∶40,20∶50,10∶60,0∶70组合;C∶R在40∶60下,柚子皮∶苜蓿为60∶0,50∶10,40∶20,30∶30,20∶40,10∶50,0∶60组合。24组饲粮组合及3种单独原料分别测定培养2,4,6,9,12,24,36,48,72,96h内的产气量,并通过24h产气量(GP24h)和加权估算值计算出各组合的组合效应值(AE)。结果表明:与精料补充料和苜蓿相比,柚子皮的NDF含量较低,产气参数较高。C∶R为20∶80时,各组AE均为负值,80∶0组显著大于0∶80组(P<0.05);C∶R为30∶70时,各组AE无显著差异(P>0.05),30∶40、10∶60组AE分别为14.74%和3.61%,30∶40组AE较好,其他组为负值;C∶R为40∶60时,0∶60组AE极显著大于60∶0组(P<0.01),显著大于30∶30组(P<0.05),10∶50组有大于60∶0组的趋势(P=0.079),即0∶60、10∶50、20∶40组AE较大。因此要获得高的AE,高精料(C∶R为40∶60)时,使用低比例柚子皮(0、10、20);中等精料(C∶R为30∶70)时,使用中等比例柚子皮(30);低精料时(C∶R 20∶80)使用高比例柚子皮(80)。An experiment was conducted to investigate the effects of the proportions of pomelo peel and alfalfa in different concentrate-roughage ratios（C∶R）on the associative effects（AE）of diets in vitro.Pomelo peel∶alfalfa proportions were 80∶0,70∶10,60∶20,50∶30,40∶40,30∶50,20∶60,10∶70,0∶80 when C∶R was 20∶80.Pomelo peel∶alfalfa proportions were 70∶0,60∶10,50∶20,40∶30,30∶40,20∶50,10∶60,0∶70 when C∶R was 30∶70.Pomelo peel∶alfalfa proportions were 60∶0,50∶10,40∶20,30∶30,20∶40,10∶50,0∶60 when C∶R was 40∶60.Gas production（GP）was recorded at 0,2,4,6,9,12,24,36,48,72,96 h.AE was defined as the difference between the observed in vitro GP24 hand the predicted value from individual feed fermented alone.The results showed that the NDF content of pomelo peel was lower and its gas parameters were higher than either concentrate or alfalfa.The AE of all groups were negative and the AE of the group of pomelo peel∶alfalfa at 80∶0 was significantly greater than the 0∶80 group（P0.05）when C∶R was 20∶80.The AE of all groups were not significantly different when C∶R was 30∶70（P0.05）.The AE of the groups 30∶40 and 10∶60 were 14.74%and 3.61%respectively and the AE of the 30∶40 group was higher;the other groups were negative when C∶R was 30∶70.The AE of the 0∶60 group was significantly greater than the 60∶0 group（P0.01）and significantly greater than the 30∶30 group（P0.05）when C∶R was 40∶60,and the AE of the 10∶50 group tended to be greater than the 60∶0 group（P=0.079）.The AE of the 0∶60,10∶50,20∶40 groups were greatest when C∶R was 40∶60.In conclusion,AE is the greatest when high levels of concentrate（C∶R,40∶60）and low proportions of pomelo peel（0,10,20）are combined,when middle levels of concentrate（C∶R,30∶70）and pomelo peel（30）are combined,and when low levels of concentrate（C∶R,20∶80）and a high proportion of pomelo peel（80）are combined.

关 键 词：组合效应 精粗比 柚子皮 苜蓿 精料补充料 

分 类 号：S826.5[农业科学—畜牧学]