Abstract
Palm kernel meal (PKM) is the potential of raw material for feed fish ingredient because it has good nutritional content and abundant availability in Indonesia. The study was conducted to evaluate of PKM fermented as feedstuffs as well as the effect on feed digestibility of tilapia. This research consisted of 2 trials: the the test of S. cerevisiae fermentation on PKM and digestibility test of PKM as feedstuffs. The first trial used a factorial randomized design consisting of 2 factors: S. cerevisiae dose (0; 0.9; 1.5%) and incubation time (0, 24, 48 hours) with 3 replications. The second trial used a completely randomized design consisting of 3 treatment of test feed, namely A: reference feed, B: reference feed + PKM, C: reference feed + PKM fermented and 4 replications. Fish (initial weight: 5.34 ± 0.14 g) were reared in an aquarium for 40 days with a recirculation system. The results showed that the fermented of 1.5% S. cerevisiae and time incubation for 24 hours recorded the lowest crude fiber content (8.86 ± 0.51%). The highest total digestibility value (P <0.05) was found in treatment A (45.36 ± 2.17%) and C (46.61 ± 2.36%) compared to treatment B (38.46 ± 1, 07%). The highest protein digestibility value significantly (P <0.05) was found in treatments A and C (72.89 ± 4.57%, 74.27±1.26%, respectively) than treatment B (58.70 ± 3.57%). Finally, it can be concluded that the fermentation of PKM by S. cerevisiae can be used as feedstuffs for tilapia feed.
Highlights
This research consisted of 2 trials: the the test of S. cerevisiae fermentation on Palm kernel meal (PKM) and digestibility test of PKM as feedstuffs
The results showed that the fermented of 1.5% S. cerevisiae and time incubation for 24 hours recorded the lowest crude fiber content (8.86 ± 0.51%)
It can be concluded that the fermentation of PKM by S. cerevisiae can be used as feedstuffs for tilapia feed
Summary
Waktu dan Tempat Penelitian dilaksanakan selama 12 bulan, bertempat di Laboratorium. Budidaya Perikanan, Jurusan Perikanan, Fakultas Pertanian, Universitas Sultan Ageng Tirtayasa. Uji Fermentasi S. cerevisiae pada Tepung Bungkil Kelapa Sawit Tujuan dari tahapan ini adalah untuk memperoleh kombinasi antara dosis S. cerevisiae dan lama inkubasi terbaik dalam menurunkan nilai serat kasar yang terkandung dalam tepung bungkil kelapa sawit. Rancangan penelitian yang digunakan pada tahapan ini adalah rancangan acak faktorial dengan 2 faktor (dosis S. cerevisiae dan lama inkubasi) dan 3 kali ulangan. Tepung bungkil kelapa sawit yang digunakan dalam penelitian ini diperoleh dari PTPN VIII dan Mills Kertajaya, Lebak, Banten. Kemudian S. cerevisiae dengan dosis yang berbeda, yaitu 0%, 0,9% dan 1,5% (g/100 g tepung) dilarutkan dalam 50 ml air aquades dan dicampurkan secara merata pada 100 g tepung bungkil kelapa sawit sesuai dengan perlakuan (Puastuti et al 2014). Tepung bungkil kelapa sawit terfermentasi kemudian dianalisis proksimat untuk mengetahui nilai serat kasar yang terbentuk. Dosis dan lama inkubasi terbaik dalam menurunkan nilai serat kasar yang terkandung dalam tepung bungkil kelapa sawit akan digunakan pada tahapan selanjutnya
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