1. At postmortem, the low fibre diet rats had more abnormalities and tumours of body tissue than the higher fibre diet rats. 2. The proliferative zone, however, was expanded in the distal colon of the higher fibre diet fed rats. 3. At post mortem, the low fibre diet rats had more abnormalities and tumours of body tissue than the higher fibre diet rats. 4. The higher fibre rats had eight testicular tumours and one mesenteric lesion. 5. The wet weight of caecal contents was significantly less in the low fibre compared with the higher fibre diet rats. 6. The caecal and colonic tissue weights were significantly higher in the rats fed the higher fibre diet than those fed the low fibre diet. 7. The higher fibre diet fed to the rats could be regarded as their normal fibre intake and thus this study compared normal fibre intake with low fibre intake. 8. North American trials have shown that system offers much faster drying rates than with conventional swaths, reduced field losses and a higher fibre digestibility rate for livestock. |