Influence Of Whole Corn Diet On Growth Performance And Digestive Function Of Gosling

This present study was conducted to investigate effect of the whole corn diet on the growth performance and digestive function of gosling through trials of feeding and metabolic. One hundred and ninety two of 7-day-old Yangzhou goslings were randomly divided into 4 treatments, each treatment included 4 repeats subgroup with 12 goslings (6 males and 6 females) according to similar weight .The whole experiment devidede two periods , 8~28 days(period 1)and 29~70 days(period 2). Group F used mash corn diet in both periods. Group F-L used mash corn diet at period 1 as well as fed whole corn diet at period 2. Group L-F used whole corn diet at period 1 as well as fed the mash corn diet at period 2. Than, group L fed whole corn in both periods. The nutrition levels of diets for two periods were similar. The results were as follows:1. Whole corn feeding have no significantly effect on average daily weight (P>0.05), but it can highly significantly improved the feed conversion ratio (P<0.01) of gosling in both periods.2. There were significantly effect on the relative weight and length of duodenum(P<0.05), the gizzard PH (P<0.01) and relative weight of gizzard (P<0.05)which group L and F-L fed whole corn diet in both periods, but not include villous height of small intestine at 28-day-old goslings. However, whole corn diet increased the villous height, crypt depth and wall thickness of small intestine (P<0.05) at 49-day-old and 70-day-old respectively. In addition, the activity of trypsin, lipase and amylase of small intestine were promoted (P<0.05).3. The apparent metabolic rate of energy , crude protein and NDF feeding whole corn diets were 6.65%(P<0.01), 5.58%(P<0.05),17.59%(P<0.05) higher than feeding mash corn diets, respectively. Neverthless, feeding whole corn diets had no significantly affected the apparent metabolic rate of calcium, phosphor, CF and ADF (P>0.05).4. The digestive tract excreted after feeding 1.5~6 hours, and peak excretion appeared 3 hours feeding later.5. The MRT were the longest in jejunum and ileum, followed by the gizzard and colon, however, the MRT were the shortest in other segments of digestive tract. The MRT of gizzard and the total digestive tract (P<0.05) were higher significantly than feeding mash corn diet compared to feeding whole corn diet.In summary, feeding whole corn diet promoted relative weight of gizzard, relative length and weight of duodenumcompared to mash corn die which the feed conversion ratio and gizzard PH were lower. However, the villous height of small intestine was decreased at 28-day-old while the villous height, crypt depth and wall thickness of intestine were increased at 49-day-old and 70-day-old in group L. In short, feeding whole corn diet had positive impact on digestive tract development of gosling. But, the results suggested that feeding mash corn diet was more conducive to the health of small intestine of gosling at 8~28 days.