e-Journals Agria http://repository.polnep.ac.id:80/xmlui/handle/123456789/1619 2026-04-05T01:34:29Z 2026-04-05T01:34:29Z Purnamawati Dewantoro, eko Sandri http://repository.polnep.ac.id:80/xmlui/handle/123456789/1647 2019-02-08T10:03:49Z 2019-02-08T00:00:00Z

Kebutuhan vitamin C dalam pakan untuk pertumbuhan benih ikan nila pada kolam pasang surut. Purnamawati; Dewantoro, eko; Sandri Research requremet of vitamin C in feeds for tilapia seed growth in tidal pools implemented in the village of Taro Trenches. District Kakap River, Kubu Raya Regency, West Kalimantan Province, in 2006. The method used in this study is the method of field experiments. The design used was Randomized Desidn Group with a combination of tretments that are used entirely on the research there were 4 with 3 replications. Test fish used are tilapia 5-8 cm. Levels of vitamin c that is used there are three kinds, namely 0, 50, 100, and 150 mg / kg of feed. With a solid dispersive tail permeter 15 square. The feed is given 3 times a day, during 3 months of maintenance. Test feed it self in the form of artificial feed mixed 30% protein content. Feed containing vitamin C according to the treatment Type of vitamin C used was vitamin Takeda Japan 100 Ltc, with the active ingredient of vitamin C that is used L Ascorbit magnesium phosphate. The materials used for the manufacture of fine brand feed, shrimp head meal, anchow meal, coconut meal, corn flour, soy flour, fish orl and vitamin C according to the treatment And added tapioca starch as an adhesive as much as 57 of the total feed is made, feed made proksimatnya analyzed. Tilapia are maintained in a pool, consisting of 12 units black net with its own treatment, and volume of one net is 2 x1 x 1 and with a soildicontainer stocking 15 fish per square meter. The method on analysis used in this experiment is the analysis of diversity (F test) and the laboratory analysis used in the laboratory analysis of feed proximat. Supporting data, water quality monitoring in the form of observation water pH, amomonia, alkalinity, water temperature, and brightness of the water at the beginning, middle and end of the experiment To determine the type and composition of naturalfood available in the pool counting the types and abudance of plankton was also conducted at the beginning, middle and end of the experiment The results of the maintenance of ti apia can be concluded that the optimal levels of vitamin C was 107,83 mg/kg of feed. The highest absolute growth achieved in the treatmentof C is 84,33 grams of vitamin C 100 mg/kg of feed and the highest survival in treatments C and D are 93,33% and 95,56%. The best feed efficiency in the treatment of C is 52,18 g. Values water quality variables measured the water temperature of 27-30 °C, the brightness from 30 to 34,5 cm, pH 5,5 to 6,5, DO 5,5 to 5,8 ppm, 2.67 to 3,25 ppm of carbon dioxide and ammonia 0,02 to 0,11 ppm.

2019-02-08T00:00:00Z Purnamawati Nirmala, Kukuh Prihadi, Tri Heru http://repository.polnep.ac.id:80/xmlui/handle/123456789/1622 2019-02-08T11:24:56Z 2019-02-07T00:00:00Z

Tingkat Perombakan Bahan Organik Sedimen Waduk Cirata Pada Kondisi Anaerobik Skala Laboratorium Purnamawati; Nirmala, Kukuh; Prihadi, Tri Heru Semakin banyak KJA yang beroperasi akan semakin banyak limbah organik berupa buangan sisa pakan dan feses yang terakumulasi dalam Waduk Cirata. Seiring dengan meningkatnya bahan organik akan menyebabkan menurunnya konsentrasi oksigen (DO) di lapisan hipolimnion, hal ini terjadi karena oksigen di butuhk an mikroorganisme ( bakteri aerob dan bakteri anaerob) untuk merombak bahan organik menjadi senyawa yang lebih sederhana. Bila aktivitas bakteri pengurai ini berlangsung intensif, maka kualitas air waduk akan menjadi anaerob. Yang mana saat terjadi proses perombakan sisa pakan/ kotoran akan membebaskan unsur hara N, P, dan K Yang mengakibatkan cadangan DO di perairan menjadi berkurang. Penelitian tingkat Perombakan Bahan Organik Sedimen Waduk Cirata Pada Kondisi Anaerobik Skala Laboratorium telah dilakukan pada bulan Oktober 2008-Desember 2008 . Tujuan penelitian ini adalah untuk melihat tingkat perombakan bahan organik sedimen Waduk Cirata pada kondisi anaerob. Penelitian ini menggunakan metode deskriptif, penelitian dilakukan di Laboratorium Lingkungan Perairan Departemen Akuakultur FPIK-IPB. Kegiatan penelitian di laboratorium menggunakan 9 buah akuarium dengan ulru ran 30 cm x 40 cm x 60 cm. Setiap 3 aquarium diisi sampel sedimen dasar yang berasal dari Waduk Cirata sctinggi ± 10 cm/aquarium/stasiun dan penambahan air ± 40 cm/aquarium. Semua aquarium yang digunakan ditutup dengan plastik berwama hitam. Parameter kualitas air yang di ukur pada saat pengamatan di laboratorium meliputi suhu, DO, karbondioksida (C02), total fosfat, ortho phospat (PO4), nitrit (N02), nitrat (NO3), amoniak (NH3), alkalinitas, kesadahan, sulfida total (H2S), COD, BOD Ca, dan C-Organik dilakukan pada hari ke 0, 20, 40, dan 60. Sedangkan parameter yang diukur setiap hari yaitu :Redoks, suhu, DO, pH. Pengam atan jumlah dan jenis bakteri dilakukan pada awal dan akhir penelitian (bari ke 0 dan 60). Analisis kualitas air dan analisis sedimen hasil penelitian dilakukan di Laboratorium Lingkungan Perairan Departemen Akuakultur FPIK-IPB dan analisa bakteri hasil pengamatan di laboratorium Mikrobiologi Departemen Biologi. Semua data di paparkan secara deskriptif dan di analisis cluster (Cluster Analysis) , diinterpretasikan dalam bentuk Dendogram. Dari hasil analisis deskriptif fisika kimia air dan sedimen yang dilihat pada grafik pola dinamika tingkat perombakan menunjukkan pada hari ke-20 terjadinya degradasi bahan organik dan reduksi (pengurangan oksigen), tingginya nilai sulfida, BOD, amonia, nitrit dan nitrat. Sehingga menunjukkan bahwa proses dekomposisi yang terjadi pada sedimen termasuk dalam kategori anaerobik. Sebaran karakteristik fisika kimia air dan sedimen memperlihatkan bahwa Stasiun 3 (dibagikan outlet) memiliki nitrit yang tinggi.

2019-02-07T00:00:00Z Purnamawati Susilawati Nofreeana, Andri http://repository.polnep.ac.id:80/xmlui/handle/123456789/1621 2019-02-06T17:06:18Z 2019-02-07T00:00:00Z

PEMBESARAN IKAN NILA JANTAN MONOSEX DENGAN PADAT TEBAR DAN CARA PEMBERIAN PAKAN YANG BERBEDA DI KOLAM PASANG SURUT Purnamawati; Susilawati; Nofreeana, Andri This research was carried out at swamp area in Jeruju village, Sungai Kakap District, West Borneo Province in 2006. The red mono sex nilas were cultured in swamp pond consisted of six nets. Every net has 2 x 1 x 1 m dimension.The research was arranged by Factorial Randomized Block Design. First factor was density population which had 1O, 15, and 20 nilas per meter square. Second factor was method of feeding which consisted of self feeder and broadcast feeder. There were six combination treatments and three replications. Parameters were observed namely daily growth rate,feed consumption ratio (FCR), and survival rate (SR). Water quality was observed as complement data.The feed has 30% protein content. The result showed that the 15 nilas/m2 produced the best growth namely 220.2 to 236 gram and the SR is 99%. Financial analysis showed that the 15 nilas/m2 and self feeder had 1,572,500 rupiahs of benefit and R/C was 1.40. While the broadcast feeder had 1,291,500 rupiahs of benefit and R/C was 1.32.

2019-02-07T00:00:00Z