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Establishment of New Evaluation System for Feed Nutritive Value

饲料营养价值新评价体系的建立

基本信息

批准号：
07660358
负责人：
TANIGUCHI Kohzo
金额：
$ 0.96万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07660358/
关键词：
steer digestion by-product rumen small intestine microbial protein 米糠脂質微生物合成

项目摘要

In order to evaluate feed nutritive value for ruminants with digestion in the rumen, small intestine and large intestine, steers fitted with ruminal, duodenal and ileal cannulas were used and fed various by-product diets in comparison with barley diet as a control in three experiments.1.In the experiment 1, when raw-, heated- and defatted-rice bran, or wheat bran was fed ; (1) defatted rice bran increased in situ degradability and decreased prorionate of ruminal fluids, (2) heated rice bran compared with raw rice bran did not affect microbial synthesis and nutrients digestion, and the both full-fat rice brans suppressed the ruminal fiber digestion, and showed a low fat digestibility in the small intestine, (3) the ruminal digestibility of nonstructural nonstarch polysaccharides was less than 30% for the all diets. 2.In the experiment 2, when beet pulp, citrus pulp and soybean hulls were fed ; (1) the in situ degradability for soybean hulls was less than that for the others, (2) the ruminal concentration of acetate was higher for the by-product diets than for the control, (3) the microbial protein synthesis was greater for the beet pulp and the citrus pulp diets, (4) the ruminal digestibility of nostructural nonstarch polysaccharides was less than that of starch, but varied with by-products. 3.In the experiment 3, when high by-product diets with different proportions of heated-rice bran and beet pulp were fed ; (1) a high proportion of the rice bran in the diet resulted in an increase of the ruminal propionate concentration and decreased ruminal fiber digestibility, the microbial synthesis and DE intake, (2) the rice bran content did not affect the digestibilities of fat and nonstructural catbohydrate. 4.Through the three experiments, in situ DM degradability had significant linear relationships with the ruminal digestibility and the microbial synthesis, and this indicates that in situ degradability is an useful variable as a new evaluation method of feed.

为评价反刍动物瘤胃、小肠和大肠消化的饲料营养价值，选用装有瘤胃、十二指肠和回肠插管的阉牛，饲喂不同副产物日粮，并与大麦日粮作对照，进行了三个试验：1.试验1，饲喂生米糠、加热脱脂米糠或麦麸;（2）加热米糠与生米糠相比，不影响微生物的合成和营养物质的消化，两种全脂米糠均抑制瘤胃纤维的消化，且在小肠中表现出较低的脂肪消化率，（3）非结构性非淀粉多糖的瘤胃消化率均低于30%。2.试验2中，分别饲喂甜菜渣、柑橘渣和大豆皮;（1）大豆皮在瘤胃内的降解率低于其它几种，（2）副产物日粮的乙酸浓度高于对照，（3）甜菜渣和柑橘渣日粮的微生物蛋白合成量高于对照，（4）非结构性非淀粉多糖的瘤胃消化率低于淀粉，但因副产物不同而异。3.在试验3中，当饲粮中添加不同比例的热米糠和甜菜渣时，（1）高比例的热米糠导致瘤胃丙酸浓度升高，瘤胃纤维消化率、微生物合成和DE摄入降低，（2）米糠含量对脂肪和非结构性碳水化合物的消化率没有影响。4.通过三项实验，DM原位降解率与瘤胃消化率和微生物合成呈显著线性关系，这表明原位降解率是一个有用的变量，可以作为饲料的新评价方法。