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Abstrak (Bhs. Indonesia)

Eucheuma cottonii merupakan salah satu jenis rumput laut yang sudah  dikembangkan karena mengandung produk karaginan tinggi yang penting dalam industri makanan. Peningkatan pertumbuhan dan produksi rumput laut dapat dilakukan dengan budidaya yang lebih efektif dan efisien disesuaikan dengan lahan budidaya. Modifikasi sistem penanaman bertingkat dan penggunaan bobot awal yang tepat dapat menghasilkan produksi rumput laut maksimal. Penelitian ini bertujuan untuk mengetahui pertumbuhan dan produksi rumput laut Eucheuma cottonii yang ditanam dengan sistem dan bobot awal yang berbeda, sehingga dapat ditentukan sistem dengan bobot yang menghasilkan pertumbuhan dan produksi tertinggi di perairan Pandansari, Brebes. Rancangan yang digunakan dalam penelitian ini adalah RAK pola Split Plot, sebagai main plot adalah bobot awal, yaitu bobot awal 100 gram (A1) dan bobot awal 125 gram (A2). Sebagai sub plot adalah sistem penanaman, yaitu sistem tali tunggal (B1), jaring tubuler  (B2), dan jaring tabung (B3), dengan 3 kali ulangan. Hasil pengamatan menunjukkan bahwa sistem budidaya jaring tabung bertingkat mampu menghasilkan pertumbuhan yang lebih tinggi dibandingkan sistem budidaya tali tunggal dan jaring tubuler bertingkat. Sistem budidaya jaring tabung bertingkat dengan bobot awal 100 gram menghasilkan pertumbuhan tertinggi yaitu sebesar 13,165 gram/hari dan produksi tertinggi sebesar 1446 gram/m2.

Abtrak (Bhs. Inggris)

Eucheuma cottonii is a kind of seaweeds which is important to be developed because it contains carrageenan whose has important economic value for food industry. Seaweeds development and production could be increased by more effective and efficient cultivation adjusted with its cultivation area.  Modification of compound cultivating system and using appropriate early weight would result in maximal seaweeds production. This study aimed to determine the growth and production of E. cottonii cultivated with different cultivating systems and early weights, therefore the cultivating system with weight produced the highest growth and production in Pandansari coast, Brebes could be determined. This research used Completely Randomized Design (CRD) Split Plot pattern, as main plot was early weights, which are 100 gram (A1) and 125 gram (A2). As sub plot was cultivating systems, which are monoline system (B1), tubular net (B2), and tube net (B3), then repeated for 3 times.  Observed parameters were the growth of E. cottonii and its production. Supported parameters were temperature, salinity, pH, and light intensity.  Obtained data were analyzed using F test to find out the effect of treatments.  If there were significant or very significant effect then were continued using Least Significant Difference (LSD) test to determine the difference among treatments.  The result showed that compound tube net system has given the highest development than other cultivating systems.  Compound tube net system with early weight 100 gram produced the highest development, which is 13,165 gram/day and the highest production, which is 1445,625 gram/m2.

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