Sains Malaysiana 43(5)(2014): 675–681

Replacement of Rice Bran with Pleurotus florida Stalks on Growth Performance

of Oreochromis niloticus Fingerlings

(Penggantian Dedak Padi dengan Batang Cendawan Pleurotus florida dalam Prestasi Tumbesaran Anak Ikan Tilapia Oreochromis niloticus)

HASNIYATI MUIN^{1 2}, NURUL NADWA ABDUL FATAH¹, IZZAT HAMDI BAHARI¹& SHAHARUDIN ABDUL RAZAK^{1 2}*

¹AquaNutriBiotech Laboratory, Biological Sciences, Faculty of Science, University of Malaya

50603 Kuala Lumpur, Malaysia

²Pusat Penyelidikan Bioteknologi Glami Lemi, Glami Lemi, Titi, 71650 Jelebu, Negeri Sembilan, Malaysia

Received: 11 May 2012/Accepted: 23 August 2013

ABSTRACT

A 6-weeks feeding experiment was conducted to evaluate the effect of replacement of rice bran with mushroom stalk (Pleurotus florida), an agriculture waste, on growth performance in tilapia fingerlings (Oreochromis niloticus). Three isonitrogenous (32% crude protein) diets were formulated. Rice bran was replaced with 100% (Diet 1), 50% (Diet 2) and 0% (Diet 3, control) mushroom stalk. Each dietary treatment was tested in triplicate group of 12 fingerlings per tank arranged in completely randomized design. The result of this study showed that there was no significant difference (p>0.05) among all diets in terms of growth performance and feed utilization. Diet 1 gave the best results in BWG, SGR, FCR and PER. An economic evaluation indicated that Diet 1 gave the lowest production cost at RM 2.03/kg followed by Diet 2 (RM2.18/kg) and Diet 3 (RM2.38/kg). Taking all the factors into consideration, the best diet was Diet 1 with 100% replacement of rice bran with mushroom stalks which is also the cheapest diet. This shows that Pleurotus florida stalks can replace 100% of rice bran in practical tilapia diets.

Keywords: Carbohydrate; feed utilization; growth performances; Oreochromis niloticus; Pleurotus florida

ABSTRAK

Suatu kajian tentang diet pemakanan selama 6 minggu telah dijalankan untuk menilai kesan potensi penggantian dedak padi dengan batang cendawan (Pleurotus florida) yang merupakan bahan buangan pertanian dalam prestasi tumbesaran anak ikan tilapia (Oreochromis niloticus). Tiga diet mengandungi kira-kira 32% protein diformulasikan. Dedak padi diganti dengan 100% (Diet 1), 50% (Diet 2) dan 0% (Diet 3, kawalan) batang cendawan. Setiap ujian dilakukan sebanyak 3 kali dengan setiap satu mengandungi 12 ekor ikan diatur secara rawak. Hasil kajian menunjukkan bahawa tiada perbezaan yang signifikan (p>0.05) bagi semua diet daripada segi aspek prestasi tumbesaran dan juga penggunaan nutrisi makanan. Diet 1 menunjukkan kadar tumbesaran yang baik bagi BWG, SGR, FCR dan PER. Anggaran kos menunjukkan Diet 1 menghasilkan kos yang paling rendah iaitu RM 2.03/kg diikuti oleh Diet 2 (RM2.18/kg) dan Diet 3 (RM2.38/kg). Berdasarkan faktor ini, diet yang terbaik adalah Diet 1 yang menggantikan 100% dedak padi dengan batang cendawan dan ia juga merupakan diet yang paling murah. Ini menunjukkan bahawa batang cendawan (Pleurotus florida) boleh menggantikan 100% dedak padi dalam diet praktikal tilapia.

Kata kunci: Karbohidrat; Oreochromis niloticus; penggunaan nutrisi makanan; Pleurotus florida; prestasi tumbesaran

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*Corresponding author; email: shahdin@um.edu.my