| This experiment was performed to measure the nutrient content of corn starch residue and its utilization rate of metabolizable energy and nutrients in overfed geese.By feeding experiments on Yangzhou geese at the age of 28 to 70 days,we also determined the optimal additive quantity of corn starch residue for geese,which can provide reference for application of corn starch residue as non-conventional feed of goose.In themetabolism test,ten 50-weeks-old healthy male Yangzhou geese with similar weight were overfed with 80g corn starch residue(the way of "24h+24h").The results showed that corn starch residue has a high level of energy and a high concentration of crude protein(CP).The average percentage of some nutritional indexes were as follow:dry matter content,86.03%;CP,25.46%,crude fat(EE),8.883%;crude fiber(CF),7.541%;crude ash(Ash),4.996%;nitrogen free extract,39.82%;Ca,0.038%;P,0.298%.The Apparent Metabolizable Energy(AME)and Ture Metabolizable Energy(TME)of corn starch residue was 17.15 MJ/Kg and 17.83 MJ/Kg,respectively.Corn starch residue is a availability feed resource.The true utilization rate of CP,EE,CF,Ash,Ca and P was 62.61%,85.44%,20.80%,43.21%,57.00%and 57.33%,respectively.The feed experiments were performed to investigate the effects of different levels of dietary corn starch residue supplemental on the growth performance,body measurements,slaughter performance,viscera indexes,economic benefits,blood biochemical indexes,meat quality,intestinal histology and tibia intensity of Yangzhou geese during the age of 28 to 70 days old.By these experiments,we determined the optimal additive quantity of corn starch residue for Yangzhou goose..A total of three hundred 28-day-old healthy male Yangzhou geese with similar body weight were selected and randomly divided into five groups(including a control and four treatment groups).Each group had six replications(ten geese per replication).During the experimiment(day 28 to day 70),the control group was fed with a basal diet and the treatment groups were fed with diets supplemented with 10%,20%,30%and 40%corn starch residue(every 10%corn starch residue replaced 7.28%corn and 2.72%soybean meal),respectively.The results showed that,1)the Average Daily Gain(ADG)and Feed Meat Ratio(F/G)of Yangzhou geese at 28 to 70 days of age was significantly affected by level of corn starch residue in the way of quadratic curves(P<0.01),i.e.ADG was increased firstly and then decreased,whereas F/G was decreased firstly and then increased.2)Increase of com starch residue level led to significant decreases in chest depth,body side length and percentage of abdominal fat of geese(P<0.05).3)Conversely,increase of corn starch residue level led to extremely significant increase in leg muscle percentage(P<0.05)and 4)induced the development of intestine.5)Corn starch residue with additive quantity no more than 20%could decrease the feed cost and increase the profit.6)Increase of corn starch residue level led to increase in Blood urea nitrogen,Uric acid,Low-density lipoprotein(P<0.05)and Albumin(P<0.10).7)Meat quality,intestinal histology and the intensity of the tibia were not significantly affected(P>0.05).In conclusion,Corn starch residue consists of high level of GE and CP.Corn starch residue is an ideal substitute of the corn and soybean meaL Corn starch residue with additive quantity no more than 20%showed no passive effect on growth performance,body measurements,slaughter performance,viscera indexes,economic benefits,blood biochemical index,meat quality,intestinal histology and the intensity of the tibia.Corn starch residue with additive quantity more than 30%would decrease the growth and slaughter performances,body size and relative weight of viscera.Considering the profit,10%to 20%of corn starch residue was the optimal additive quantity which could to be added to the diet of geese from day 28 to 70. |
PDF Full Text Request