Effects Of White Distillers’ Grains Diets On Performance And Nutrient Apparent Digestibility Of Goats

The white distillers’grains contains rich protein, balanced amino acid and abundantmineral elements. It is suitable for ruminants for high quality and low cost. However, theresearch on white distillers’ grains on goats were very less. This experiment was conductedto investigate the effects of white distillers’ grains supplemental level on performance,nutrients apparent digestibility and serum biochemical indices of goats in order todetermine the optimal supplemental level of white distillers’ in goats’ diet. It is not onlyprovides the theory basis for the full use of white distillers’ grains, but also provides thescientific basis for barn feeding and half barn feeding technology on goats.Fourty eight four-month-old goats with an average body weight of (17.77±4.20) kgwere randomly assigned to four groups, and each group had12goats (half male and halffemale). The goats in the4groups were fed the experimental diets containing0%(controlgroup),10%,20%,30%of white distillers’ grains, repectively. The experiment lasted for57days, and the amount of feeding(dry basis) was restricted to1.0kg/(goat.d). The resultsshowed as follows: the differences were not significant in the4groups on initial weight,final weight, average body length gain, average height gain,averge chest gain (P＞0.05).The10%group had the highest average net gain, average daily gain, dressing percentage,pure meat percentage, average length gain, the best economic benefit and the lowest F/G.And the dressing percentage and pure meat percentage in10%supplemental group weresignificantly higher than those in control group(P＜0.05). The10%supplemental grouphad the highest apparent digestibility of dry matter, metabolizable energy, crude protein,neutral detergent fiber, phosphorus. And the apparent digestibility of dry matter andmetabolizable energy in10%supplemental group were significantly higher than those in30%supplemental group (P＜0.05). No significant differences were found in average netgain, average daily gain, feed/gain and nutrients apparent digestibility among30%supplemental group and control group(P＞0.05). In addition, there was no significantdifference in serum total protein content amang all groups (P＞0.05), but the serum ureanitrogen content in30%supplemental group was significantly higher than that in controlgroup and10%supplemental group (P＜0.05). The10%group had the highest benefit,81.87%、44.71%、90.02%higher than the control group,20%group and30%group respectively. It is concluded that the supplemental levels of white distillers’grains in dietsless than30%have no adverse effects on performance and nutrient apparent digestibility ofgoats. Overall consideration, the diet supplemented with10%white distillers’grains hasthe best effect for goats. The Metabolizable energy of white distillers’ grains calculated bythe experiment was5.48MJ/kg, the digestible crud protein was106.24g/kg.