Suyadi

Pengaruh Pemberian Prostaglandin F2 Alpha Terhadap Waktu Kemunculan Birahi dan Keberhasilan Inseminasi Buatan Sapi Brahman Cross (Bx) Heifers

This study was conducted to examine the effect of PGF2α injection on onset oestrus and pregnancy rate of Brahman Cross (BX) heifer at Breeding Unit of PT. Pasir Tengah, Cianjur-West Java. Oestrus synchronization was carried out by intramuscular injection of 5 ml of the synthetic PGF2α in active corpus luteum phase. Oestrus observed 24 hours after PGF2α injection. Artificial insemination with frozen semen was conducted 8h after observed estrous. The material used in this research were 40 heifers given a PGF2α injection and 40 heifers without injection. The method used is experimental design, if there were a significant result, continued tested by Chi-square method. The variable observed were onset estrous (every 4 hours after PGF2α injection), characteristic of estrous (visual characteristic in estrous condition) and conception rate. The result showed that oestrus response or degree of synchronizing after PGF2α injection was good. 21 heifers were shown onset estrous mostly on days-30 until days-40 after 5 ml injection. The other hand, PGF2α has no effect on pregnancy rate. Pregnancy rate was found 53% for heifers with PGF2α injection and 63% for heifers without PGF2α injection, Determination Pregnancy rate was performed by using Non-Return Rate score.

Effect of Supplementing Saccharomyces cerevisiae into Low Quality Local-Based Feeds on Performance and Nutrient Digestibility of Late Starter Local Pigs

The study aimed at evaluating the effect of supplementing Saccharomyces cerevisiae into low quality local-based feeds on performance and nutrient digestibility of late starter to grower stage local pigs. There were total 16 late starter local pigs fed with four treatment feeds based on block design with four pigs in each treatment. The four treatment feeds offered consisted of: commercial starter feeds Charoen Pokphand 552 (T0), basal feeds + yeast 2% of daily feeds requirement (T1), basal feeds + yeast 4% of daily feeds requirement (T2) and basal feeds + yeast 6% of daily feeds requirement (T3). Feed intake, daily weight gain, feed conversion efficiency, protein and crude fiber digestibility were evaluated in the study. The findings showed that supplementing S. cerevisiae into low quality local-based diet improved 0.9%-2.7% feeds’ crude protein, 10%-19% feeds intake, 1%-6% daily weight gain, 3%-4% crude protein digestibility and 4%-5% crude fiber digestibility, but reduced feeds conversion efficiency by 0.3-0.4. The conclusion drawn is that supplementing S. cerevisiae (yeast) up to 6% improved performances of starter local pigs fed low quality feeds and performed the similar result with feeding commercial starter feeds Charoen Pokphand 552. Further research by widening the range and increasing the level of yeast supplementation could be done.