Íslenskar landbúnaðarrannsóknir - 01.09.1976, Qupperneq 86

Íslenskar landbúnaðarrannsóknir - 01.09.1976, Qupperneq 86
84 ÍSLENZKAR LANDBÚNASARRANNSÓKNIR The crude protein averaged 20.7 per cent of the dry matter. 4. The nitrate content (N03-N) of the kale and rape was high at the start of the experiment, but declined with time. The kale showed a higher N03-N content than the rape, both in stems and leaves. 5. The copper content of the kale was somewhat higher than that usually found in other Nordic countries. 6. No disease symptoms were observed in the lambs grazing the kale and rape. 7. During the first 10 days the lambs on kale and rape did not gain appreciably in live weight, but group III had 6.2 kg and group IV 4.7 kg heavier carcass weight at slaughter than group I. 8. Group III had 4.7 and group IV 4.4 kg heavier carcass weight than group II. Group II showed almost 5 kg live weight increase but no increase in carcass weight. 9. Dressing out percentage in group II de- creased by 3.3 per cent, but increased by 4.5 and 6.6% in groups III and IV respectively, compared to group I. 10. A marked increase was observed in size and weight of the thyroid gland and liver in the kale and rape groups, the thyroid being nearly three times and the liver almost twice the weight of the same organs in the controls. 11. The chemical composition of the liver was comparable in all groups with re- gard to dry matter, protein, fat and ash, except that group IV showed lowest value of protein and fat, and the ash content was about 1 per cent lower in the kale and rape lambs than in the controls. 12. The copper content of the livers from lambs in groups III and IV was some- what lower than that in group I and only about 14 of that found in group II. 13. No significant difference in liver palata- bility was found between groups I and III. 14. The blood picture of the lambs was comparable to that of housed ewes during winter, except for a higher level of urea in the lambs. 15. The blood constituents haemoglobin, haematocrit and bilirubin content were found to decrease with time. 16. The clotting time of the blood was shorter in the kale and rape lambs than in the controls, both on Oct. 3rd and Oct. 27th. The clotting time decreased with time. 17. Worm and egg counts did not indicate any signs of the lambs being hampered by parasites.
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