PRODUKSI Azolla Sp. DENGAN PADAT TEBAR BERBEDA PADA BUDIDAYA LELE DUMBO (Clarias sp.) TERPADU

NURUL ROFIAH, Dr. Ir. Bambang Triyatmo, M.P.; Ir. Sukardi, M.P.

2019 | Skripsi | S1 AKUAKULTUR

Budidaya lele yang dilakukan secara intensif menyebabkan peningkatan kesuburan air budidaya. Penelitian ini bertujuan untuk mengetahui produksi Azolla sp. dengan padat tebar berbeda pada budidaya lele dumbo (Clarias sp.) terpadu dan untuk mengetahui pengaruh Azolla sp. terhadap unsur hara yang terkandung dalam air budidaya lele selama 2 bulan. Budidaya lele dilakukan dalam kolam (ukuran 4 x 5 x 1,5 m3 dan kedalaman air 80 cm) di Stasiun Penelitian Unit Kolam Percobaan, Departemen Perikanan, Bulaksumur, Yogyakarta. Penelitian dilakukan pada bulan Agustus hingga Desember 2017. Benih lele (ukuran 9-12 cm yang berasal dari Cangkringan, Sleman) ditebar pada kolam tersebut sebanyak 2000 ekor (100 ekor/m2) dan dipelihara selama dua bulan. Selama pemeliharaan lele diberi pakan pelet dengan dosis 5 % berat lele total. Produksi Azolla sp. dengan perlakuan 4 padat tebar dilakukan pada permukaan air kolam budidaya lele tersebut, masing-masing seberat 6, 12, 18, 24 g/keranjang dengan ukuran keranjang untuk budidaya azolla 45 x 20 (tinggi 5 cm), secara berurutan analog dengan 67, 133, 200, 267 g/m2. Selama pemeliharaan lele, produksi azolla dengan perlakuan 4 padat tebar dilakukan sebanyak 3 kali periode tanam hingga panen (selama dua minggu/periode). Pengamatan dilakukan terhadap pertumbuhan lele setiap dua minggu dan produksi azolla pada 3 periode tanam dua mingguan secara berurutan. Pengamatan juga dilakukan terhadap kualitas air budidaya lele khususnya amonium (NH4+), nitrat (NO3-), fosfat (PO43-), dan sulfat (SO42-). Hasil penelitian menyimpulkan bahwa jumlah berat tebar Azolla sp. pada budidaya lele terpadu berpengaruh terhadap pertumbuhan dan produksi tanaman. Produksi Azolla sp. terbaik pada periode minggu pertama dan kedua, dicapai pada berat tebar 267 g/m2. Kualitas air khususnya konsentrasi amonium, konsentrasi nitrat, konsentrasi sulfat, dan konsentrasi fosfat cenderung menurun selama penelitian.

Intensive cultivation of catfish causes an increase in aquatic fertility. This study aimed to determine the production of Azolla sp. with different cropping densities on integrated African catfish (Clarias sp.) and to determine the water quality in the catfish cultivation during Azolla sp. production for 2 months. Catfish cultivation was carried out in a pond (size 4 x 5 x 1.5 m3 and water depth of 80 cm) at the Experiment Pool Unit Research Station, Fisheries Department, Bulaksumur, Yogyakarta. The study was conducted in August to December 2017. Catfish seeds (size 9-12 cm from Cangkringan, Sleman) were stocked in the pond as many as 2.000 animals (100 seeds/m2) and cultivated for two months. During the catfish cultivation were fed with pellets with a dose of 5 % by weight of total catfish. Azolla sp. production with treatment 4 cropping densities were carried out on the surface of the catfish cultivation pond, each weighing 6, 12, 18, 24 g/basket (basket size for azolla 45 x 20 x 5 cm3), analogous to respectively 67, 133, 200, 267 g/m2. During the cultivation of catfish, the production of azolla with the treatment of 4 cropping densities were carried out 3 times the planting periods to harvest (for two weeks/period). Observations were made on catfish growth every two weeks and azolla production in 3 sequential biweekly planting periods. Observations were also made on the water quality of aquaculture catfish, especially ammonium (NH4+), nitrate (NO3-), phosphate (PO43-), and sulfate (SO42-). The results of the study concluded that the amount of stocking weight of Azolla sp. on integrated catfish cultivation has an effect on plant growth and production. Azolla sp. production best in the first and second week periods, achieved at a cropping weight of 267 g/m2. Water quality, especially ammonium concentration, nitrate concentration, sulfate concentration, and phosphate concentration tended to decrease during the Azolla sp. production.

Kata Kunci : ata Kunci: Azolla sp., Intensif, Kualitas Air, Lele, Produksi