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Articles by J. Ruttanavut
Total Records ( 2 ) for J. Ruttanavut
  J. Ruttanavut and K. Yamauchi
  To investigate the growth performance and histological intestinal alterations of broilers fed on dietary mixed minerals (MM), 7 day old broiler chicks were divided into 4 groups, with 4 replicates of 12 male chicks. They were fed ad libitum for 49 days with a basal commercial mash diet supplemented with MM at 0, 0.5 and 1 g kg-1 throughout the experiment (control, 0.5 g kg-1 MMS, 1 g kg-1 MMS) and 0.5 g kg-1 during the finisher period (0.5 g kg-1 MMF). Mineral supplementation did not influence the growth performance of broilers during the first 3 weeks, but tended to show higher growth and feed efficiency for the MM groups than for the control group at week 7. In light microscopic observation, values of the intestinal villus height, villus area and cell mitosis numbers were higher (p<0.05) in the 0.5 g kg-1 MMS and 0.5 g kg-1 MMF groups than those of the control in the duodenal segment. In scanning electron microscopic observation, all MM groups showed more protuberant epithelial cells on the villus apical surface of the duodenum. The present histological intestinal alterations in broilers fed the MM diet demonstrate that intestinal function could be stimulated in the duodenum, resulting in improved growth performance. The results obtained in this study have revealed that minerals may need to be supplemented during the finisher period of broiler production at a higher content than the feed manufacturer recommendation, to allow optimal performance.
  J. Ruttanavut , K. Yamauchi , H. Goto and T. Erikawa
  To investigate effects of a mixture of bamboo charcoal powder and bamboo vinegar solution (SB) on growth performance and histological intestinal change, 48 mixed sex Aigamo ducks were fed the basal commercial diet supplemented with SB at 0, 0.1 and 1% ad libitum for 49 days. Although, feed intake, weight gain and feed efficiency were not significantly different, the growth performance tended to be improved with increasing dietary SB. In these birds, also the intestinal villus height, villus area, epithelial cell area and cell mitosis in all intestinal segments tended to be increased with increasing dietary SB and increased in 1% dietary group (p<0.05). Besides, protuberated cells were observed on the villus apical surface in SB groups. These histological intestinal alterations of the villi and epithelial cells suggest that the intestinal function would be hypertrophied by the dietary SB and that the dietary SB can use at 1% level for Aigamo duck diets.
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