| This experiment was carried out to study the effect of fiber on growth performance, metabolic rate, digestive tract, meat quality and the change of microbes of intestine in geese of different breeds. The mechanism of utilizing crude fiber for geese was discussed. In this paper, the JL AU I (meat breed), JLAUIII(egg breed) and JLAU cross geese(crossed of I and HI) twenty respective were selected as experimental animals, while Corn stalk and purple medic powder admixture were considered as fiber resource. The test was divided into two periods. The influence of different-day geese on the metabolic rate of diet nutrition was studied, respectively. In production practice, the paper supplied the reliable bases for studying utilization fiber in geese.The results showed as follows:Crude fiber can be utilized by geese , utilizing ability is different by geese of different breed. In the experiment, for the former period, digestibility of fiber components in geese were: CF19.53%~20.25%, NDF36.35%~38.70%, ADF10.80~15.69%, hemicellulose 46.64%~48.87%; for the latter period, digestibility rates of fiber components was: CF 15.31%~18.02%, NDF25.60~29.85%, ADF5.18-12.78%, hemicellulose 34.82-38.40%. The digestibility of crude fiber, NDF and hemicellulose in geese were cross geese> I >III both in former period and latter period.Growth performance is different in geese of different breed, and the initial weight was related to the weight of latter weight. Geese I had the ultimate weight ,so their weight were higher than other geese. The daily gain in three group geese was I > cross geese>III. Relatively gain was III> cross geese> I . But the weight gain all appeared at fifth and eighth week. The utilizing ability of feed was I > cross geese>III.The development of digestive tract was different in geese of different breed. Gross geese had ultimate relatively weight of gizzard, duodenum, jejunum. The thickness of caecum of cross geese was significantly thicker than geese III(P<0.01), thicher than geese I (P<0.05) . The shape of caecum was different in geese of three breeds. Cross geese had best the development of caecum , and its proportion of absorbing was supreme. The shape of caecum were alike in geese I and geese III.The results of biochemistry about blood serum showed: content of fat and protein in muscle and blood serum was different in geese of different breed. The content of fat and protein were III> I >cross geese. It showed that geese III had characteristic of high protein and low fat, and it had the best quality of body in there breed. But it has the shortage of small figure and low utilization ability of feed. Cross geese hired the characteristic of big figure and high utilized ability of feed from father and the characteristic of good quality of body from mother.The digestibility rate of NDF in diet was positive correlation with the metabolic rate of protein (P<0.05) and fat (P<0.01) . The digestibility rate of ADF in diet was negative correlation with the metabolic rate of protein ( P<0.01) and fat ( P<0.05 ) . The digestibility rate of hemicellulose was positive correlation with the metabolic rate of protein (P<0.05) . The digestibility rate of CF was positive correlation with the digestibility rate DM (P<0.05 ) , and was negative correlation with the metabolic rate of energy (P<0.01) . Aside, the digestibility rate of ADF was negative correlation with the digestibility rate of NDF and CF (P<0.01) .The quantity of microbe in caecum was positive correlation with NDF (P<0.05) , hemicellulose (P<0.01) and CF (P<0.01) .Microbe were activity in whole digestive tract. But it was few in duodenum, jejunum and ileum(105). There were many microbe in caecum(107), it was significantly higher than other digestive tract (P<0.01) .In terms of utilizing fiber for geese, ferment of microbe in caecum play the important role . The digestible of fiber is functioned by gizzard and caecum together .
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