【作者】 朱立涛；

【导师】 王继成； 谭支良；

【作者基本信息】 湖南农业大学 ， 动物营养与饲料科学， 2007， 硕士

【摘要】 本论文以平均体重为20±2kg的4头安装有永久性瘤胃、十二指肠前端和回肠末端的T形瘘管的健康浏阳黑山羊为研究对象，按照4×4拉丁方设计，研究物理有效纤维含量(peNDF)对山羊营养物质流通量、消化性能及氮平衡的影响。物理有效纤维含量用宾夕法尼亚州颗粒分离装置(PSPS)测定，日粮1、日粮2、日粮3、日粮4的peNDF含量分别为19.27％、23.13％、24.81％、28.26％。日粮1、日粮2、日粮3、日粮4的物理有效因子(pef)分别为64.96％、77.99％、83.66％、95.28％。研究结果如下：1．日粮物理有效中性洗涤纤维(peNDF)含量对山羊淀粉的采食量、回肠流通量、粪中流通量、全消化道消化量和消化率、小肠消化率没有显著影响(P＞0.05)。日粮peNDF含量对山羊淀粉在十二指肠的流通量、胃区消化量和消化率、小肠消化量有显著影响(P＜0.05)。淀粉在十二指肠流通量表现为随着日粮peNDF含量的增加有增加的趋势。在胃区，淀粉的消化量和消化率随着peNDF含量的增加有降低的趋势。在小肠，淀粉消化量表现出随着日粮peNDF含量的增加有增加的趋势。2．日粮peNDF含量对NDF在粪中流通量、小肠消化量和消化率有显著影响(P＜0.05)，而对NDF的采食量、十二指肠流通量、回肠流通量、胃区消化量和消化率、全消化道消化量和消化率没有显著影响(P＞0.05)。小肠消化量和消化率随着日粮peNDF含量从19.27％-24.81％的增加有降低的趋势。3．日粮peNDF含量对ADF在粪中流通量、小肠消化量和消化率有显著影响(P＜0.05)，而对ADF的采食量、十二指肠流通量、回肠流通量、胃区消化量和消化率、全消化道消化量和消化率没有显著影响(P＞0.05)。ADF的小肠消化量和消化率、粪中流通量随着日粮peNDF含量从19.27％-24.81％增加有降低的趋势。4．日粮peNDF含量对山羊N的采食量、流通量和消化没有显著影响(P＞0.05)。5．日粮peNDF含量对山羊OM的小肠消化量和消化率有显著影响(P＜0.05)，而对采食量、十二指肠、回肠、粪中流通量、胃区消化量和消化率、全消化道消化量和消化率没有显著影响(P＞0.05)。6．日粮peNDF含量对山羊十二指肠氨基酸(AA)流通量中的Glu有显著影响(P＜0.05)，但对其他氨基酸没有显著影响(P＞0.05)。对十二指肠AA组成中的Ala有显著影响(P＜0.05)，对其他氨基酸没有显著影响(P＞0.05)。日粮peNDF含量对山羊AA回肠流通量的没有显著影响(P＞0.05)。日粮peNDF含量对回肠AA组成中的Glu、Leu有显著影响(P＜0.05)，其中Leu随着日粮peNDF含量的增加有增加的趋势：Glu随着日粮peNDF含量的增加有降低的趋势。对其他氨基酸没有显著影响(P＞0.05)。日粮peNDF含量对Glu、Arg的小肠消化率有显著影响(P＜0.05)，对其他氨基酸的小肠消化率没有显著影响(P＞0.05)。7．日粮peNDF含量对氮平衡没有显著影响(P＞0.05)，氮存留率以日粮1即peNDF含量为19.27％最高，日粮peNDF含量在19.27％-28.26％之间增加而山羊沉积氮、氮存留率有降低的趋势。更多还原

【Abstract】 The effects of tour diets with similar concentrate-to-forage diets on nutrientsflow, digestion performance and nitrogen balance were evaluated using 4 liuyangblack goats that were surgically and permanently fitted ruminant ,duodenal top, andileum bottom T-shaped cannulas in a 4×4 Latin square design with 17-d perperiod.The peNDF content were determined using the Penn State particle separatorand were 19.27％, 23.13％,24.81％,28.26％for the dietl,diet2,diet3,diet4 ,respectively,and the physical effectiveness factors for the diet one,diet two,diet three,diet four were64.96％,77.99％,83.66％,95.28％,respectively.The results showed that:1. Digestion of starch and flow in the tractWhen goats fed different diets starch in duodenal flow, digestive amount of areagastrica and small intestine, digestibility of area gastrica on goats were significantlyaffected by peNDF content, and effects of starch of intake, ileum and fecal flow,digestibility of small intestine and total tract, digestive amount of total tract were notfound in the study. A trend of increased starch in duodenal flow and small intestineand decreased digestibility and digestive amount of starch in area gastrica was existedwith increased peNDF content of diets.2. Digestion and flow of NDF and ADF in the tractThere were significantly difference of NDF flow in fecal digestive amount anddigestibility of small intestine when goats fed four different peNDF content diets, andno effect of NDF on intake and flow duodenal and ileum ,digestive amount anddigestibility of area gastrica , digestibility and digestive amount of total tract wasfound., and decreased NDF digestive amount and digestibility was found withincreased peNDF content. The result about ADF was similar with NDF ,but decreasedADF in facel flow with increased peNDF content of diets from the first diet to thethird diet.3. Digestion and flow of N in the tract N intake, flow and digestion of goats were not affected by different peNDF contentdiets.4. Digestion and flow of OM in the tractOM of digestive amount and digestibility of small intestine were affected bypeNDF content diets, but there were no effect on OM intake flow of duodenal, ileumand fecal, digestive amount and digestibility of area gastrica, digestive amount anddigestibility of total tract.5. Digestion and flow of AA in the tractThere were significantly difference on Glu of A in duodenal flow when goats feddifferent peNDF content of diets, but the others were not and about composition ofAA, Ala was affected by different diets, but the others were not .No effect about AAflow in ileum was found Glu, Ieu content increased peNDF content. Digestibility ofsmall intestine of Glu, Arg were significantly affected by diets, but others were not.6. Nitrogen balanceNitrogen balance was not significantly affected by peNDF content of diets. Thehighest amount and rate of retention nitrogen was the first diet, retentive rate andamount of nitrogen was decreased with increased peNDF content from19.27％to28.26％更多还原