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EFFECT OF DIFFERENT LEVELS OF DEGRADABLE AND UNDEGRADABLE PROTEIN IN THE RUMEN ON MILK YIELD AND COMPOSITION OF KARADI CROSSBRED CATTLE | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 15, Issue 1, 2010, Pages 0-0 | ||
| Authors | ||
| S. A. Hassan; M. K. Arif | ||
| Abstract | ||
| The aim of this work was to study the effect of different levels of degradable and undegradable protein in the rumen (high-low, medium-medium, and low-high) in rations containing the same level of nitrogen and energy on daily feed intake, quantity and composition of milk. The experiment was a series of 3×3 Latin Squares design. So that each group of cows received each treatment once during the experimental period (3 weeks). The first two weeks was considered a preliminary period and the third week as an experimental period. Cows were also fed a straw ad - libtum. During the experimental period daily yield was recorded, and milk samples was collected. Result revealed that the level of degradable protein in the rumen has no significant effect on daily feed intake. Milk production was significantly higher in a treatment 1 (10.97 kg) in comparison with treatment 2(10.62 kg) and 3(10.76kg). Result indicates that the effect of treatments on milk protein percent (4.268, 4.268 and 4.344%) fat (2.955, 3.077 and 2.966%) ash (0.69, 0.67 and 0.67%) and PH (6.176, 6.177 and 6.176) was not significant. Where as, the effect of treatment on total solid (11.963, 12.463 and 12.311%) and solid not fat (9.008, 9.386 and 9.345%) was significant. | ||
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