| 饲喂秸秆颗粒日粮对绵羊瘤胃和整体消化代谢的影响 |
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| 引用本文： | 周封文,雒秋江,陈勇,董凌云,潘榕.饲喂秸秆颗粒日粮对绵羊瘤胃和整体消化代谢的影响[J].新疆农业大学学报,2013(5):345-351. |
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| 作者姓名： | 周封文 雒秋江 陈勇 董凌云 潘榕 |
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| 作者单位： | 新疆农业大学动物科学学院动物营养实验室,乌鲁木齐830052 |
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| 基金项目： | 新疆维吾尔自治区科技攻关项目（201131110） |
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| 摘 要： | 选取4只2岁左右、装有永久性瘤胃瘘管的小尾寒羊公羊,采用2×2交叉试验设计,喂给精粗比为28∶72的碎粉（对照）或颗粒玉米秸秆日粮,在饲喂后0,1．5,3．0,5．0,7．0,10．0 h 采取瘤胃液样品分析,并进行整体消化代谢试验,以研究饲喂秸秆颗粒日粮对绵羊采食和消化代谢的影响.结果表明,饲喂颗粒日粮时,绵羊的干物质采食量增加34．9％（P ＜0．01）；瘤胃液氨态氮和总挥发性脂肪酸（TVFA）平均浓度分别降低11．6％（P ＞0．05）和8．7％（P ＞0．05）；瘤胃液原虫数量减少10．0％（P ＜0．05）；瘤胃液细菌总数增加9．9％（P ＜0．01）；真菌拷贝数增加2．9％（P ＞0．05）；瘤胃液体积增加22．7％（P ＜0．01）,后送率提高18．4％（P ＜0．01）.饲喂颗粒日粮时绵羊有机物、粗蛋白和纤维素的表观消化率分别降低11．5％（P ＜0．01）,5．1％（P ＜0．05）,9．9％（P ＜0．05）,但有机物、粗蛋白和纤维素的消化量却分别增加21．1％（P ＜0．01）,29．2％（P ＜0．01）,17．8％（P ＜0．05）.饲喂颗粒日粮时绵羊的氮、钙和磷的保留量分别增加21．5％（P ＜0．01）,14．7％（P ＜0．05）,18．5％（P ＜0．01）.由本试验得出结论,饲喂秸秆颗粒日粮可极大地提高绵羊的自由采食量,增加绵羊的营养物质消化量,提高氮保留,但会造成日粮消化率显著降低；饲喂颗粒日粮时瘤胃液原虫数量减少,细菌总数增加,氨态氮和 TVFA 浓度有降低趋势,但由于瘤胃液体积和后送率的增加,瘤胃原虫和真菌总量均可能增加.本试验表明,饲喂秸秆颗粒日粮是改善绵羊营养代谢的有效方法.
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| 关 键 词： | 绵羊 秸秆 颗粒 瘤胃 消化 |
Effects of Feeding the Pelletized Cornstalk Diet on the Digestion and Metabolism of the Rumen and Whole Body in Sheep |
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| ZHOU Feng-wen,LUO Qiu-jiang,CHEN Yong,DONG Ling-yun,PAN Rong.Effects of Feeding the Pelletized Cornstalk Diet on the Digestion and Metabolism of the Rumen and Whole Body in Sheep[J].Journal of Xinjiang Agricultural University,2013(5):345-351. |
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| Authors: | ZHOU Feng-wen LUO Qiu-jiang CHEN Yong DONG Ling-yun PAN Rong |
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| Institution: | ZHOU Feng-wen,LUO Qiu-jiang,CHEN Yong,DONG Ling-yun,PAN Rong |
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| Abstract: | Four of Small Tail Han Sheep ram with permanent rumen fistula,about 2 years old,with body weight of （57.3±5.6）kg,were fed with the diets of the pelletized or ground（as control）cornstalk diets （concentrate∶roughage=28∶72）.By 2×2 cross-over design,the rumen liquid was collected at 0,1.5,3.0, 5.0,7.0,and 10 h after feeding and the digestion and metabolism experiment of whole body was carried on, to study the effect of feeding pelletized cornstalk diet on the intake,digestion and metabolism of sheep.The results showed that by feeding pelletized diet,the voluntary intake of dry matter was increased by 34.9% （P 0.05） and 1 1.6% （P 〉0.05）respectively;the rumen protozoa was decreased by 10.0% （P 0.05）;the volume and turnover of rumen fluid were increased by 22.7% （P 〈0.01）and 18.4 % （P 〈0.01）respec-tively.When the pelletized diet was fed,the apparent digestibility of organic matter,crude protein and cellu-lose was decreased by 1 1.5% （P 〈0.01）,5.1% （P 〈0.05）and 9.9% （P 〈0.05）respectively,however,the digested amounts were increased by 21.1% （P 〈0.01 ）,29.2% （P 〈0.01 ）and 17.8% （P 〈0.05 ）respec-tively.The nitrogen,calcium and phosphorous retentions of sheep were increased by 21.5% （P 〈0.01 ）,14.7% （P 〈0.05）and 18.5% （P 〈0.01）respectively,compared with the ground diet.It is concluded that the feeding pelletized diet could greatly increase the voluntary intake of sheep,increase the digested amount of nutrients and the nitrogen retention of sheep,but significantly decrease the digestibility of diet;by feed-ing pelletized diet,the rumen protozoa was decreased,the total bacteria of rumen fluid was increased,and the NH 3 -N and TVFA of rumen fluid had a tendency to decrease;however,because of the increase of the volume and turnover of rumen fluid,the total amounts of protozoa and fungi were possibly increased.This experiment showed that feeding cornstalk pelletized diet may be an effective method for improving sheep nutrition. |
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| Keywords: | sheep cornstalk pelletized rumen digestion |
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