KARIMATULLAH, MUHAMMAD RIZKY (2023) PENGARUH FITASE DALAM PAKAN BUATAN TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN BENIH TAWES (Barbonymus gonionotus) (23da234). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Muhammad Rizky Karimatullah. 26020119130123. Pengaruh Fitase
dalam Pakan Buatan terhadap Pertumbuhan dan Kelulushidupan Benih Tawes
(Barbonymus gonionotus). Subandiyono dan Rosa Amalia).
Penggunaan pakan buatan pada budidaya tawes (Barbonymus gonionotus)
dinilai kurang efektif karena terdapat zat anti nutrisi salah satunya asam fitat yang
dapat menghambat pertumbuhan ikan. Upaya yang dapat dilakukan untuk
menghilangkan zat anti nutrisi tersebut adalah dengan fitase dalam pakan buatan.
Penelitian ini bertujuan untuk mengetahui pengaruh fitase dalam pakan buatan
terhadap pertumbuhan dan kelulushidupan benih tawes (B. gonionotus). Penelitian
dilakukan di Lokasi Kerja Muntilan, Kota Magelang pada bulan OktoberDesember 2022 dengan lama pemeliharaan selama 56 hari. Ikan uji yang
digunakan adalah benih tawes (B. gonionotus) yang memiliki bobot individu ratarata 1,25±0,11 g. Penelitian ini menggunakan metode eksperimental dengan
rancangan acak lengkap (RAL) terdiri atas 6 perlakuan dengan 3 kali ulangan
yakni perlakuan A, B, C, D, E, dan F dengan penambahan fitase masing-masing
sebesar 0,0; 0,25; 0,50; 0,75; 1; dan 1,25 g/kg pakan. Variabel yang diamati
meliputi total konsumsi pakan (TKP), feed conversion ratio (FCR), efisiensi
pemanfaatan pakan (EPP), protein efficiency ratio (PER), relatif growth rate
(RGR), dan survival rate (SR). Berbagai parameter kualitas air yang diukur adalah
suhu, pH, DO, dan ammonia. Data dianalisis dengan analisis ragam dan apabila
berpengaruh nyata maka dilakukan uji lanjut Duncan untuk mengetahui perbedaan
antar perlakuan. Uji polinomial orthogonal dilakukan untuk mengetahui dosis
optimum fitase. Hasil penelitian menunjukkan bahwa penambahan fitase pada
pakan buatan berpengaruh nyata (P<0,05) terhadap semua variabel uji. Hasil
terbaik semua variabel biologis diperoleh pada perlakuan E. Nilai terbaik untuk
variabel FCR, EPP, PER, RGR, dan SR diperoleh pada dosis fitase 1,16; 2,62;
2,58; 2,36; dan 1,56 g/kg pakan yaitu sebesar 1,20; 89,76%; 2,85%; 8,44; 100%.
Kesimpulan pada penelitian ini bahwa nilai terbaik untuk semua variabel terdapat
pada pakan uji dengan dosis fitase optimum berkisar 1,16-2,62 g/kg pakan.
Kata Kunci: benih tawes, fitase, kelulushidupan, pertumbuhan

ABSTRACT
(Muhammad Rizky Karimatullah. 26020119130123. The Effect of
Phytase Enzyme in Artificial Feed on Growth and Survival Rate of Java Barb
(Barbonymus gonionotus) Fingerlings. Subandiyono and Rosa Amalia).
The use of artificial feed in tawes (Barbonymus gonionotus) cultivation
is considered less effective because there are anti-nutritional substances that can
inhibit fish growth. Efforts that can be made to remove anti-nutritional substances
is by adding phytase in artificial feed. This study aims to determine the effect of
adding phytase in artificial feed on the growth and survival of Tawes (B.
gonionotus) seeds. The research was conducted at the Muntilan Work Location,
Magelang City in October-December 2022 with a maintenance period of 56 days.
The test fish used were Tawes seeds (B. gonionotus) which have a length ranging
from 3-5 cm and an average weight of 1,25 ± 0,11 g. This study used an
experimental method with a completely randomized design (CRD) consisting of 6
treatments with 3 replications, namely treatments A, B, C, D, E, F with the
addition of 0.0 phytase; 0.25; 0.50; 0.75; 1; 1.25 g/kg feed. The variables
observed included total feed consumption (TKP), feed conversion ratio (FCR),
feed utilization efficiency (EPP), protein efficiency ratio (PER), relative growth
rate (RGR), and survival rate (SR). Various water quality parameters that were
measured were temperature, pH, DO and ammonia. Data were analyzed by
analysis of variance and if it had a significant effect then Duncan's further test
was carried out to determine differences between treatments. Orthogonal
polynomial test was performed to determine the optimum dose of phytase. The
results showed that the addition of phytase to artificial feed had a significant
effect (P<0.05) on all test variables. The best results for all biological variables
were obtained in treatment E. The best values for the variables FCR, EPP, PER,
RGR, SR were obtained at phytase doses of 1,16; 2,62; 2,58; 2,36; 1,56 which is
equal to 1,20; 89,76%; 2,85%; 8,44; 100%. The conclusion in this study is that
the best values for all variables are found in treatment E with optimum phytase
doses ranging from 1,16 to 2,62 g/kg feed.
Keywords: Tawes seeds, growth, phytase, survival rate

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