家兔对柠条营养物质的消化试验研究

Digestibility of Dietary Peashrub Nutrients

摘要选择伊普吕(父系)成年兔、青年兔各18只(公母各半),采用内源指标剂法(4NHCl不溶灰分法)进行家兔消化试验。结果显示:①肉兔对饲粮中粗蛋白质消化率较高,达70.60%～73.75%;对柠条中粗蛋白质消化率达70.59%～88.76%,但随柠条比例升高消化率略有下降。②肉兔对粗纤维消化率有限,但对柠条中粗纤维消化率较高。③家兔对饲粮和柠条中粗脂肪消化率达98%以上。研究结果表明,家兔可有效利用柠条中的营养物质,柠条可作为一种饲用价值较高的兔用饲料。

Peashrub,the common name for all cultivates of Caragana microphylla Kom.,belongs to a perennial deciduous shrub.It is drought/heat-resistant,wind/sand-hardiness and is psammophilous plant grown in fixed/half-fixed sand.Peashrub is regarded as a fine tree variety to sand shifting control and water/soil conservation.It has been listed as one of the important tree varieties in current Conversion Project in northern China.On the purpose to study peashrub nutritional valuse,a feeding experiment focusing on the effects to rabbit production performance was conducted from April to June in 2002.Forapproaches to new feed resources and to make good utilization of peashrub,the present study was undergone to evaluate nutritional values in peashrub through the measurement of rabbits' digestibility of crude protein,crude fat and crude fiber in rabbits.In the present experiment,18 Hybrid young rabbits,half to half of the male to the female,and the method of enogenous indicator,4NHCL un-dissolved ash method,were applied.The results are the following:The rabbits had a digestibility for dietary crude protein as high as 70.60%～73.75%and even high for peashrub CP from 70.59%to 88.76%.While the digestibility decreased along with the rise of level of peashrub meal in diet.Though rabbit's digestibility for crude fiber is rather limited,it was relatively high for peashrub crude fiber.Rabbits had a good digestibility over 98%for dietary and peashrub crude fat.These rseults suggest that rabbits are capable of making a good utilization of peashrub nutrients and Peashrub could be considered as one of the important feed rseources for domestic rabbits.