Pengaruh Ketebalan Media Fermentasi Ampas Tahu dan Padat Tebar terhadap Pertumbuhan Cacing Sutra (Tubifex sp.)

Abstract

The cultivation of silkworms is still very rare, because to the low result of its culture. Chosing the right cultural medium is necessary. The aimed of this study was to determine the effect of the thickness of the tofu dregs fermentation media and the different stocking densities on the population, biomass, and length of silkworms (Tubifex sp.).  this study was conducted on 12 February to 9 April  2021 at the Fish Hatchery and Breeding Laboratory, Faculty of Fisheries and Maritime, University of Riau. The method used was a completely randomized design with two factors. The first factor was the thickness of the media with three levels, namely 1 cm, 1.5 cm, and 2 cm respectively. The second factor was stocking density with four levels of 10, 15, 20, and 25 g respectively, besides that there was a control medium (K) in the form of pond mud, so there was 15 treatments levels. Each treatment used 3 replications. The results showed that the the optimal silkworm population growth was 9971±72.84 individuals, biomass growth was 77.56±1.05 g and length gain was 2.60±0.09 cm (P12, treatment tofu dregs fermented media with a thickness of 2.0 cm and a stocking density of 20 g), while the lowest was in treatment P1(control, treatment. uses pond mud as a medium with a thickness of 2.0 cm and a stocking density of 10 grams). Based on the test results of the Analysis of Variance (ANAVA) factor of media thickness and stocking density, the combination of the two factors had a significant effect on population growth (individuals), biomass (grams), and length (cm) of silkworms (Tubifex sp.) (P < 0, 05). This research concludes that 2 cm of tofu dregs fermentation medium and 20 g of stocking density is the optimum point for silkworm culture.  Budidaya cacing sutra masih sangat minim, karena masih rendahnya hasil kulturnya.  Menggunakan media kultur yang tepat dibutuhkan. Penelitian ini bertujuan untuk mengetahui pengaruh ketebalan media fermentasi dan padat tebar yang berbeda terhadap populasi, biomassa dan panjang cacing sutra (Tubifex sp.) yang dikultur pada media fermentasi ampas tahu, dilakukan 12 Februari – 9 April 2021 di Laboratorium Pembenihan dan Pemuliaan Ikan Fakultas Perikanan dan Kelautan Universitas Riau. Metode yang digunakan adalah Rancangan Acak Lengkap pola faktorial (RAL) dengan dua faktor. Faktor pertama ketebalan media dengan tiga taraf masing-masing 1 cm, 1,5 cm, dan 2 cm. Faktor kedua padat tebar dengan empat taraf masing-masing 10g, 15g, 20g dan 25g, selain itu ada media kontrol (K) berupa lumpur kolam, sehingga diperoleh 15 taraf perlakuan. Setiap perlakuan menggunakan 3 kali ulangan. Hasil menunjukkan bahwa pertumbuhan optimal populasi cacing 9971±72,84 individu, pertumbuhan biomassa 77.56±1,05 g, pertambahan panjang 2.60±0,09 cm (P12, kultur cacing sutra menggunakan media fermentasi ampas tahu dengan ketebalan 2,0 cm dan padat tebar 20 g), sedangkan yang terendah terdapat pada perlakuan P1 kultur cacing sutra menggunakan media lumpur kolam dengan ketebalan 2,0 cm padat tebar 10 gram). Berdasarkan hasil uji Analisis Variansi (ANAVA) faktor ketebalan media dan padat tebar, serta kombinasi kedua faktor memberikan pengaruh nyata terhadap pertumbuhan populasi (individu), biomassa (gram) dan panjang (cm) cacing sutera (Tubifex sp.) (P < 0,05). esimpulan penelitian ini adalah dengan media fermentasi ampas tahu 2 cm dan padat tebar 20 g merupakan titik optimum kultur cacing sutra