Ash Content Of Milk Research Articles

Ensilaging in Polyethylene Bags: A Low Cost Technology for Resource Poor Livestock Farmers

An action oriented participatory method was used to popularize Polythene Bag Silage (PBS). On-farm demonstrations were conducted on preparation of PBS and also to evaluate it. Dairy cows of control group (T0) were maintained on regular feeding, while cows in study group (T1) were fed with PBS. Daily milk yield was recorded for 60 days. Milk samples from individual cows were analyzed for fat, SNF, density, freezing point, protein, lactose and total ash. The increased milk yield in T1 group on 30th and 60th days were highly significant (p≤ 0.05) when compared with T0 group on corresponding intervals. The freezing point decreased in T1 group indicating increase in the total solids of milk compared to T0. There were minor changes in ash content of milk by feeding with PBS. The increased cost on feeding in treatment group (T1) due to addition of PBS preparation cost (Rs 13.65) is covered up by significant increase in milk production (2.29 litres/ cow/ day).

Effect of heat stress on milk production and its composition of Holstein Friesian crossbred dairy cows

The aim of this research was to observe the effect of heat stress on milk yield and milk compositions of Holstein Friesian crossbred (HF) dairy cows. To fulfill the objectives, a total of 9 Holstein Friesian crossbred cows were selected for this study. Green grasses (German, Para) were supplied adlibitum and concentrate feeds (mixture of wheat bran, rice polish, mustard oil cake, di-calcium phosphate and salt) were supplied at the rate of 2.0 kg/day/cow. Management practices for all the cows were similar following the BAU Dairy farm practices. Data were collected on milk yield (l/h/d), relative humidity (%) and barn temperature (0C). The obtained temperature humidity index (THI) of July, August, September and October were 84.95, 81.99, 81.40 and 79.57, respectively. The highest THI was found in July which indicated higher heat stress during this month. A significant difference (p<0.05) in milk yield of cows was found among different months of July to October. The highest milk yield (6.10±0.50 l/h/d) was found in October among observed months. The compositions of milk such as total solids (TS), solids-not-fat (SNF), fat, protein, lactose, and ash also differed significantly (p<0.01). The highest values (%) of TS, SNF, fat, protein, lactose and ash content of milk were found in October as 12.63, 8.80, 3.83, 3.69, 4.39 and 0.72, respectively and lowest values (%) were in July as 12.20, 8.50, 3.71, 3.50, 4.30 and 0.69, respectively due to the high THI value. From these results, it is concluded that heat stress has strong effect on milk yield and milk composition of HF cows in Bangladesh. Management strategies are needed to minimize heat stress and attain optimal dairy animal performance.Asian J. Med. Biol. Res. June 2016, 2(2): 190-195

Effect of Cholesterol Removal Processing Using β -Cyclodextrin on Main Components of Milk.

Various concentrations (0%, 0.5%, 1% and 1.5%) of β-CD were mixed with different fat contents (1%, 2.5% and 3%) of raw (unhomogenized) and homogenized milk at two mixing temperatures of 8 and 20°C. The cholesterol residue, fat, protein, lactose, solid nonfat (SNF), density, and ash content of milk were measured for each treatment. The results statistically analysed and showed that the cholesterol content of milk remarkably decreased as the β-CD was increased particularly in homogenized milk at 20°C. However, the reduction rate of cholesterol was decreased when extra β-CD was added due to its intermolecular reactions. The maximum cholesterol reduction was achieved at the level of 1% β-CD. The fat content, SNF, protein, lactose, and density content were decreased with increasing β-CD whereas it did not affect ash content.

Feeding goats on scrubby Mexican rangeland and pasteurization: influences on milk and artisan cheese quality

The objective of this study was to evaluate the effect of foraging on local scrubby rangeland versus stable feeding with high-protein concentrate as well as the compulsory pasteurization process on goats’ milk and artisan soft cheese quality in terms of chemical composition and fatty acid profile. The results indicated that there were no significant differences in the energy, fat, or ash content of milk and cheese due to feeding; however, a significant influence of feeding on cheese protein and fatty acids in both milk and cheese was detected. Feeding on scrubby rangeland tended to increase the amounts of major polyunsaturated fatty acids in milk and cheese from goats. Pasteurization, which is mandatory in Mexico, did not alter the fatty acid concentrations in milk or cheese. Small goat-keepers using rangeland resources might claim better economical returns for products recognized as healthier. Further investigations to assure ecosystem sustainability of shrubby rangeland joined with economical evaluations and best animal management to avoid deleterious effects are recommended.

Effect of sodium bicarbonate on milk yield and milk composition of goats and on rumen fermentation of kids

Eighteen goats and ten kids were used to assess effects of NaHCO 3 on milk yield and milk composition of Damascus goats, the rumen fermentation pattern and apparent digestion coefficients in Damascus kids. The bicarbonate diet caused an increase in FCM yield, milk fat content and total solids content of milk. There were no significant differences between diets in milk yield and ash content of milk, but the bicarbonate diet significantly reduced milk protein content. The addition of NaHCO 3 resulted in a significant increase in water intake, which was significantly correlated with dry matter intake. The presence of NaHCO 3 increased rumen pH and acetate, but decreased propionate molar proportions, and did not alter rumen volatile fatty acid concentration. There were no significant differences in rumen ammonia nitrogen concentration and urine pH. The addition of bicarbonate did not significantly alter digestibility coefficients, nitrogen retention and absorption but increased urinary and faecal sodium output significantly.