Volume 8, Issue 1 (spring 2004)
jwss 2004, 8(1): 135-143 |
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A. Karimi, E. Rowghani, M. J. Zamiri, M. Zahedifar. Nutritive Value of Gundelia tournefortii and Alfalfa (Medicago sativa) in the Ration of Lambs. jwss 2004; 8 (1) :135-143
URL: http://jstnar.iut.ac.ir/article-1-410-en.html
URL: http://jstnar.iut.ac.ir/article-1-410-en.html
Abstract: (29373 Views)
An experiment was carried out to determine the effect of substituting alfalfa hay (Medicago sativa) with Gundelia tournefortii hay (a range forage in Fars Province) in the ration of fattening lambs. Alfalfa hay was substituted with Gundelia tournefortii harvested at the final stages of flowering at various ratios (0, 25, 50, 75, and 100% dry matter basis) in the ration of fattening lambs. The rations (iso-nitrogenous and iso-energetic) were pelleted and each ration was fed for 75 days to 12 Shirazi Grey ram lambs with an average age of 136 days. The lambs were slaughtered and their feedlot performance and carcass characteristics were measured. Substituting alfalfa hay with Gundelia tournefortii hay did not significantly affect the mean daily weight gain, feed consumption, feed conversion ratio, dressing percentage, internal fat weight, carcass meat content, or meat DM and CP contents (p>0.05). However, backfat depth was significantly different among various rations (p<0.01). At present costs, the inclusion of Gundelia tournefortii in the ration of fattening lambs seemed to be cost-effective the cost of one kg DM of ration was 1266, 1155, 1050, 924, and 787 Rials for rations 1 to 5, respectively.
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