Supplementary values of ipil-ipil and/or dried poultry manure to rice straw for dairy heifers
2001
Trung, L.T. | Abenir, E.E. | Palo, L.P. | Matias, J.M. | Rivera, C.C. | Lapinid, R.R.
Supplementary values of ipil-ipil leaf meal (ILM) and dried poultry manure (DPM) to rice straw were evaluated using 20 crossbred yearling dairy heifers. Rice straw was maintained at 35 percent of total ration dry matter. The concentrate portion was varied as follows: Ration 1 - 45 percent ILM and 20 percent others; Ration 2a - 45 percent ILM and 20 percent others; Ration 3 - 22.5 percent ILM and 22.5 percent DPM and 20 percent others, and Ration 4 - 65 percent others (control). After the first 3 months, Ration 2a was found unsatisfactory as judged by DM intake and growth rate and therefore was replaced by Ration 2b - 30 percent ILM, 15 percent DPM and 20 percent others. Dry matter intakes and average daily gain did not differ significantly between treatment means, except for Ration 2a during the first 3 months. Parameters on reproductive performance did not reveal any clear-cut differences between treatments with pregnancy rate ranging from 40 to 60 percent and the number of services per conception from 1.0 to 2.0. The heifers were expected to calve for the first time at 24.3 to 30.4 months of age. As evaluated by cost-gain ratio, under commercial scale, ration 1 was found significantly more expensive than the rest due to high cost of ILM. Under backyard scale, however, the control ration (4), was found significantly more expensive mainly due to costs of rice bran and copra meal.
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