摘要
Two experiments were conducted to study the effect of supplemental histamine in the diet of early-weaned piglets. In experiment A, 24 cross bred piglets with an average body weight of 6.10±0. 40 kg, weaned at the age of 28 days, were divided into four groups, fed with basal diet of low dietary copper without (control) or with supplemental histamine at 60, 120, 180μg kg-1 BW. During the two weeks and the third week after weaning, ADG(average daily gain) of piglets were increased by 15.8%(P<0. 05), 9.5%(P< 0.10) by addition of 60μg kg-1 BW histamine, but decreased by addition of 180μg kg-1BW histamine, which also increased the amount of E. coli in colon and the scour incidence. The secretion of gastric acid and pepsin were improved by both dose of supplemental histamine (60, 180μg kg-1BW) and gastric digesta pH were decreased by both. Addition of 60 μg kg-1 BW histamine improved the activities of trypsin, amylase in duodelum digesta. In experiment B, 12 cross bred piglets with an average body weight of 6. 85±0.35 kg, weaned at the age of 28 days, were divided into two groups, fed with basal diet of high dietary copper without (control) or with supplemental 60 μg kg-1 BW histamine. During the two weeks and the third week after weaning, ADG of piglets were increased by 9. 8% (P<0.05), 7. 0% (P<0. 10). The secretion of gastric acid, activities of trypsin and amylase in duodelum digesta, were also improved by addition of 60 μg kg-1BW histamine. The results showed that addition of histamine (60μg kg-1BW) in early weaned piglets could increase the secretion of gastric acid and pepsin, reduce gastric digesta pH and scour incidence, improve activities of trypsin, amylase in duodelum digesta, and the growing performance of early weaned piglets.
Two experiments were conducted to study the effect of supplemental histamine in the diet of early-weaned piglets. In experiment A, 24 cross bred piglets with an average body weight of 6.10±0. 40 kg, weaned at the age of 28 days, were divided into four groups, fed with basal diet of low dietary copper without (control) or with supplemental histamine at 60, 120, 180μg kg-1 BW. During the two weeks and the third week after weaning, ADG(average daily gain) of piglets were increased by 15.8%(P<0. 05), 9.5%(P< 0.10) by addition of 60μg kg-1 BW histamine, but decreased by addition of 180μg kg-1BW histamine, which also increased the amount of E. coli in colon and the scour incidence. The secretion of gastric acid and pepsin were improved by both dose of supplemental histamine (60, 180μg kg-1BW) and gastric digesta pH were decreased by both. Addition of 60 μg kg-1 BW histamine improved the activities of trypsin, amylase in duodelum digesta. In experiment B, 12 cross bred piglets with an average body weight of 6. 85±0.35 kg, weaned at the age of 28 days, were divided into two groups, fed with basal diet of high dietary copper without (control) or with supplemental 60 μg kg-1 BW histamine. During the two weeks and the third week after weaning, ADG of piglets were increased by 9. 8% (P<0.05), 7. 0% (P<0. 10). The secretion of gastric acid, activities of trypsin and amylase in duodelum digesta, were also improved by addition of 60 μg kg-1BW histamine. The results showed that addition of histamine (60μg kg-1BW) in early weaned piglets could increase the secretion of gastric acid and pepsin, reduce gastric digesta pH and scour incidence, improve activities of trypsin, amylase in duodelum digesta, and the growing performance of early weaned piglets.
