Khalil, Khalil and Bachtiar, Andri and Udin, Zaituni (2019) Effects of mineral supplementation on reproductive efficiency of Simmental heifers. Asian Journal of Agriculture and Biology (AJAB), 7 (3). pp. 396-403. ISSN ISSN 2307-8553
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Abstract
The objective of the present research was to evaluate the effects of mineral supplementation on estrus onset, growth, and hematological and biochemical parameters in Simmental heifers. The study was initiated by a field survey to determine the reproductive problem of the exotic breed cattle raised by smallholders. Complete minerals were then formulated and fed to 18 Simmental heifers for 14 weeks across three groups as follows: P0, no supplementation (control), P1, supplemented with mineral feed in meal form, and P2, supplemented with mineral in block lick form. Each treatment consisted of six heifers stratified by body weight into six groups for replication. Parameters measured included estrus onset time, body weight gain, mineral intake, blood mineral levels, hematology, total protein, and progesterone levels. Simmental heifers raised by smallholders were delayed in onset of first estrus (20.4 months) and first calving (30.17 months). Heifers supplemented with minerals (P1 and P2) had an earlier estrus in the 2nd and 4th weeks, while in the control groups (P0), the first estrus appeared in the 8th and 9th weeks. Heifers supplemented with block minerals (P2) had lower body weight gain, and Fe, Zn, and progesterone levels than those supplemented with minerals in meal form (P1). The results showed that mineral supplementation in meal form positively affected estrus onset, growth rate, and biochemical parameters in Simmental heifers.
| Item Type: | Article |
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| Additional Information: | This study demonstrated that reproductive disturbances problems in Simmental cows are most likely associated with nutrient deficiencies. Mineral supplementation positively affected health, reproduction, and growth performance of Simmental heifers. The findings of this study provide supportive evidence on the importance of mineral supplementation in resuming delayed sexual maturity of imported heavy-breed cattle fed limited and low quality forage at tropical small-scale farms. Adequate nutrition of minerals could encourage the imported heavy-breed types to reach their genetic potential and minimize the negative effects of poor feeding and management practiced by traditional smallholders. |
| Uncontrolled Keywords: | Simmental heifer, Mineral supplement, Estrus onset, Hematology How |
| Subjects: | S Agriculture > SF Animal culture |
| Divisions: | Fakultas Peternakan |
| Depositing User: | Mr Khalil K |
| Date Deposited: | 30 Dec 2019 11:29 |
| Last Modified: | 30 Dec 2019 11:29 |
| URI: | http://repo.unand.ac.id/id/eprint/29163 |
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