Archive for the 'Research' Category
By Nikorn Thakwang
The objective of this research was to study the possibility in Spirulina platensis cultivation using dairy farm wastewater. The optimized concentration dairy farm wastewater for Spirulina cultivation was studied. After that Spirulina was harvested and nutrition analyzed. It was mixed with feed and used for studying a growth of male calves. The results showed that wastewater concentration at 10 %, the highest cell production was 2.5 x 10*5 cell/ml with maximum absorbance (1.125) at 560 nm. Spirulina cultivation was studied by using batch culture in three 200-liter round-cement pounds, showed that average of maximum Spirulina platensis cell was 2.82 x 10*5 cell/ml. The nutrition analyzed of harvested product was found that was contained of protein 51.02 % (Dry matter). The male calves (2 – 12 weeks) were studied the growth rate by using 2 treatment of concentrate, first treatment was soybean meal was used for protein source and second treatment was used 50% of Spirulina for protein source.
The results found that growth rate of male calves were 0.33 and 0.38 kg/h/d, respectively and not significant difference (P<0.05)
Faculty of Agricultural Production, Maejo University Chiangmai, Thailand.
March 08 2008 | Research | No Comments »
By Anupan Sinsuthawal
The studied on dietary shrimp shell meal (SSM) in pigs conducted of 2 experiments. The first experiment, eighteen crossbred (Duroc x Larg White x Landrace) barrows were used to investigate the effects on nutrients digestibility. The experiment was divided into 2 periods at 30 and 60 kg body weight. Assigning to Randomized complete block design (RCBD) with 3 blocks. The pigs were fed diets containing SSM at level of 0, 3, 4, 5, 6 and 7%. The feeding practice was ad libitum for pigs at 30 and 60 kg body weight with 16 and 14% protein; metabolism energy 3,150 and 3,100 kcal/kg, respectively.
The second experiment, thirty-six same crossbred pigs as first experiment consisted of 18 barrows and 18 gilts were used to investigate growth performance and cholesterol levels in blood. Assigning to Randomized complete block design (RCBD) was used in this experiment. Pig blood sampling was done at 30, 60, and 90 kg body weight. Drinking water was provided at all time. continue reading »
March 02 2008 | Research | No Comments »
By Puliphong jitmano
The studies was made on effect of ensiled pineapple waste and rice straw as fiber source in total mixed ration (TMR), on pH and volatile fatty acids (acetic acid, propionic acid and butyric acid) contents in rumen. Four crossbred Holstein-Friesian x Native steer each fitted with a permanent rumen fistula with an average weight of 400 +- 30 kg. randomly allocated base on Completely randomized design. They were separately fed with TMRs containing ensiled pineapple waste : rice straw rations of 50 : 0 (TMR 1 = control), 45 : 5 (TMR 2), 40 : 10 (TMR 3) and 35 : 15 (TMR 4) respectively at 2.5% BW.
The results revealed that amount of volatile fatty acid (acetic acid, propionic acid and butyric acid) generate through 8 hours of fermentation process steadily increase to arrive the highest peak at 2 hours after feeding. The largest amount found was acetic acid, followed by propionic acid and butyric acid. Steer fed with TMR containing higher ratio of rice of rice straw (TMR 2, TMR 3 and TMR 4) produced higher pH value than control (50 : 0), but not significantly difference. The results suggested the possibility to use ensiled pineapple waste in TMR in the ratio of up to 50% without any affect on rumen pH, whereas the highest amount of volatile fatty acid could be achieved.
Department of Animal Technology, Maejo University Chiangmai , Thailand.
March 01 2008 | Research | No Comments »
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