SummaryThirty Ossimi lambs were used in an experiment to compare those whose tail was docked shortly after birth with controls. After weaning at 4 months of age the groups were further subdivided and two of the four groups closely shorn according to a 2 × 2 factorial design.Male lambs at 20 kg were subjected to intensive finishing until the age of 50 weeks and nine were then slaughtered to determine carcass characteristics.There was a trend for increased live-weight gain in the docked lambs in the preweaning stage (up to 16 weeks).This trend was also present, although not statistically significant, in the final phase of intensive feeding from 20 kg weight to 50 weeks. Shearing significantly improved daily gain in this final period (P < 0·05). These increases in gain were also apparently associated with improvements in efficiency, as judged on a group basis.Docking and shearing also tended to cause increases in body measurements: height, chest girth and abdomen girth in the case of docking (P < 0·05) and chest girth, chest depth and abdomen girth in the case of shearing (P < 0–05).Carcass characteristics, measured on a relatively small sample, indicated several effects of docking and shearing on carcass traits although most of these were consistent with the expected differences stemming from the higher carcass weights acheived at 50 weeks of age by docked and sheared lambs.
Laying manure (LM) was added at 35% to plant crops and by-products to formulate 8 different types of complete silages. By evaluating these silages with Zaraibi bucks, it was noticed that the tested silage containing 30% carrot aerial parts (CAP) plus 30% clover was of the lowest quality. Whereas that containing 30% mallow aerial parts + 30% CAP was of the lowest consumption and the quickly damage. But those containing 60% potato aerial parts or 60% sugar beat aerial parts were the best concerning feed consumption (for their high quality), digestibility, and feeding value, which consequently was reflected positively on the rumen and blood parameters. Therefore, it is recommended to make more usefulness of field wastes (particularly from potato and sugar beat) and poultry farms by making high-quality silage of complete feeding value required for ruminants.
Effect of Egyptian Tafla on reducing the toxicity of aflatoxin was examined by adding different levels of Tafla to an aflatoxincontaminated diet fed to 30 growing male guinea pigs (average 133 gm). The animals divided into 5 groups equal in number and average body weight. Five diets were prepared uncontaminated diet (control), contaminated diet with aflatoxins Bt, B2, GI and G2 mixture (equals to 420 ppb aflatoxin B I), aflatoxins contaminated diet supplied with 1/2, 1 or 2% Tafla. Each of the 5 animal groups was fed with one diet only. The following measurement were recorded, daily feed intake, daily body weight gain, feed efficiency, aflatoxin intake (ppb). On the 17 th day of feeding period, three animals from each group were slaughtered. Blood samples were taken individually for biochemical study. Internal organs of each animal (liver, lung, kidney, heart and spleen) were clinically examined, weighed and samples for histopthological studies were taken. The obtained results revealed that comparing to the uncontaminated (control) diet, feeding aflatoxins B1, B2, GI and G2 mixture (equal to 420 ppb as BI) contaminated diet caused. Reduce in each of live body weight, body gain, feed intake and feed efficiency. Decrease in absolute weights of internal organs (significant only with liver and spleen) and significant increase in its relative weights. Decrease in serum total protein, ablumin and globulin, meanwhile an increase in serum total lipids, total cholesterol, creatinine, urea-N, uric acid and GOT, GPT and alkaline phosphatase activities. The differences were significant (P<0.05) except in serum albumin, and urea-N. Addition of 1 /2, I and 2% Tafla to the aflatoxins diet caused, minimize the losses in body weight and increased daily feed intake and prolonged the survival period of tested animals. Minimize the changes in blood serum components. Where the significant (P<0.05) decrease in serum globulin, cholesterol, and GOT, GPT and alkaline phosphatase activities become insignificant. However the hazard effect of aflatoxins ingestion was minimized by addition of Tafla (especially the 1 /2% level). The differences in serum creatinine and uric acid still significant comparing to the control diet. Minimized the hazard effect on liver and kidney functions. The 1 /2% level of Tafla was the highest efficient in detoxification of aflatoxins and reducing its toxicity.
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