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Articles by Songsak Chumpawadee
Total Records ( 3 ) for Songsak Chumpawadee
  Anut Chantiratikul , Songsak Chumpawadee , Wanna Kanchanamayoon and Piyanete Chantiratikul
  Four Thai-indigenous heifers, average 132±11.71 kg of body weight, were used to determine effect of dietary protein levels on nutrient digestibility and nitrogen utilization using a 4x4 Latin square design with 21d period. Heifers were fed diet containing 6, 9, 12 and 15% of CP. The findings revealed that dietary protein levels did not significantly alter (p>0.05) DM, NDF and ADF digestibilities in heifers. However, CP digestibility of heifers markedly increased (p<0.05) with increasing dietary protein levels. N intake, N fecal and urinary N excretion, N digestion and N retention significantly increased (p<0.05) when dietary protein levels increased. N retentions of heifers fed diet containing 6, 9, 12 and 15% CP were 11.53, 18.64, 24.20 and 31.08 g day-1, respectively. Based on the results, it could be concluded that dietary protein influenced significantly (p<0.05) CP digestibility and N utilization in Thai-indigenous heifers. Furthermore, the results demonstrated that protein requirement for maintenance of Thai-indigenous heifers was lower than 6% of dietary CP.
  Songsak Chumpawadee , Anut Chantiratikul , Vitee Rattanaphun , Chatchawan Prasert and Kitti Koobkaew
  The objective of this research was to determine the effect of dietary crude protein levels on nutrient digestibility, ruminal fermentation and growth rate in Thai-indigenous yearling heifers. Sixteen Thai-indigenous yearling heifers, with an average initial body weight of 118±15.39 kg were assigned to one of 4 treatments according to a completely randomized design. Dietary treatments contained 4 levels of crude protein (6, 8, 10 and 12%). Diets were fed at the rate of 3% BW. The findings revealed that dietary crude protein levels did not significantly alter (p>0.05) DM and OM digestibility in yearling heifers. However, CP, NDF and ADF digestibility of heifers increased (p<0.01) with increasing dietary crude protein levels. Ammonia nitrogen, blood urea nitrogen and average daily gain linearly increased (p<0.01) with increasing dietary protein. Base on the results, it can be concluded that increases dietary crude protein level did improve nutrient digestibility, ruminal fermentation and growth rate of Thai-indigenous yearling heifers. Additionally, it has been suggested that level of dietary crude protein should be higher than 12% during accelerated Thai-indigenous yearling heifer growth periods.
  Songsak Chumpawadee , Kritapon Sommart , Thevin Vongpralub and Virote Pattarajinda
  Six non forage high fibrous tropical feeds were used to evaluate nutritive value using the in vitro gas production technique. The rumen mixed microbe inoculums were taken from fistulated Brahman-Thai native crossbred steers. The treatments were 1) palm meal (mech-extd), 2) palm meal (solv-extd), 3) leucaena meal (leaf and stem), 4) coconut meal (mech-extd), 5) mung bean meal and 6) dried brewer gain. The treatments were assigned to completely randomize design. The results indicate that soluble gas fraction (a; -7.91, -24.06, -2.11, -28.96, -10.31 and -4.35 mL, respectively), fermentation of insoluble fraction (b; 99.33, 124.06, 70.90, 128.96, 110.31 and 99.33 mL, respectively ), rate of gas production (c; 0.054, 0.071, 0.047, 0.122, 0.050 and 0.045 %/h, respectively) and potential of extent of gas production (a+b; 107.26, 148.13, 73.02, 157.93, 120.62 and 103.82 mL, respectively) were significantly different (P<0.01) among treatments. The cumulative gas volume at 24, 48 and 96 h after incubation were significantly different (P<0.01). These results suggest that coconut meal (mech-extd), palm meal (solv-extd), mung bean meal, palm meal (mech-extd) and dried brewer gain are exhibited high fermentability in the rumen.
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