Archive for the 'Research' Category
By Montee Jampade
The experiment was conducted to determine the nutritive value and digestibility coeffcients in sweet corn residue silage with different levels of lpil-lpil leaves (Leucaena leucocephala) using total collection method. Four crossbred (Holstein Friesian x Native) heifer (average BW 350 + - 10 kg) were assigned by Latin Square Design to received all the experimental diets in four experimental period. Each period lasted 21 days with 14 days preliminary period and 7 days collection period. The experimental of diets were sweet corn residue silage, sweet corn residue silage + 10% lpil-lpil, sweet corn residue silage + 20% lpil-lpil and sweet corn residue silage + 30% lpil-lpil, respectively.
The results showed that supplementation of lpil-lpil leaves increased dry matter and crude protein content but decreased NDF and ADF contents. The apparent digestibility of DM, CP, NDF and ADF were highly significant different among treatment (P<0.01). Sweet corn residue silage had highest digestibility coefficients in all nutrients.
March 17 2008 | Research | No Comments »
By Nekom Shanasan
The study on the efficiency of pumice for aflatoxin B1 (AFB1) adsorption was carried out in vitro. It was found that the adsorption efficiency was 61% and was stable at the pH range 3 – 10. The in vivo study was carried out in 4 – 7 weeks old 707 Arbor Acre broilers of mixed sexes. One hundred forty heads of broiler were raised under the same condition during the first 3 weeks of age. Thereafter, they were divided into 7 groups, each with 2 replicates. Ten heads of each replicate were raised in 1 sq.m. floor pen, in which water and feed were allowed for freely accessed. Group 1 was the control while the diets of group 2, 4 and 6 contained 100, 200 and 300 ppb of aflatoxins (AF), respectively. The diets of group 3, 5, 7 were the same as those 3 groups but supplemented with 4% pumice. It was found that AF tended to decrease broilers’ performances (weight gain, feed intake and feed conversion ratio). At the concentration of 300 ppb AF, growth rate depressed while liver and gizzard enlarge significantly (P<0.05). Hematocrit, hemoglobin and plasma protein tended to decrease. The supplement of 4% pumice seems to reduce toxic effect of AF since broilers’ performances, blood parameters and the weight of visceral organs were improved to be equal to the control group. The supplement of pumice to the diet containing 100 ppb AF gave feed cost increased 1.92 Bt/kg BW. On the other hand, the supplement of pumice to the diet with 200 – 300 ppb AF the production cost decreased 1.11 – 1.48 Bt/kg BW.
March 14 2008 | Research | No Comments »
By Autcharee rengdat
The optimal dosage of astaxanthin for enhancing pigmentation in cichlids was studied. Cichlids fish were daily fed as 3 percent of body weigh which astaxanthin was mixed at 0, 10, 30, 50 or 70 milligram of commercial feed for 14 weeks. At the end of the the experiment, there were no statistically difference on average final body weight, daily weight gain, survival rate, feed conversion ratio, feed conversion efficiency, and protein efficiency ratio (P>0.05). After 14 week, the hue angle of pigment of cichlids fish fed 0, 10, 30, 50 and 70 mg/kg were 105.53, 96.62, 92.30, 87.65, and 86.83, respectively. It was found that the hue angle was significantly reduced as the concentration of astaxanthin increased (P<0.05). The carotenoid contents of flesh from cichlids fish fed astaxanthin 0, 10, 30, 50 and 70 mg/kg were 0.84, 2.12, 4.20, 8.36 and 9.06 mg/kg, respectively. However, the cichlids fish fed astaxanthin 50 and 70 mg/kg had no difference neither in hue angle of pigment nor carotenoid contents (P>0.05).
March 11 2008 | Research | No Comments »
Next »