Pengaruh Penurunan Laju Pemberian Pakan Konvensional Terhadap Parameter Kualitas Air dan Parameter Pertumbuhan  Biologi Udang  Vamame   (Litopenaeus vannamei) dengan Model  Tanpa Pergantian Air  Menggunakan Molase Sebagai Sumber Karbo Oranik

Pohan Panjaitan

doi:10.36490/jpu.v6i1.956

Pohan Panjaitan Universitas HKBP Nommensen

DOI: https://doi.org/10.36490/jpu.v6i1.956

Keywords: Convensual feed loss rate, heterotrophic bacteria, shrimp culture model, C:N ratio of feed

Abstract

The main problem in developing the intensive vaname shrimp (Litopenaeus vannamei) farming industry is the accumulation of toxic non-organic nitrogen. The source of non-organic nitrogen in brackish pond unit is the feed used in the shrimp brackish pond unit This study examines the effect of decreasing the rate of conventional feeding on water quality parameters and biological growth parameters of Vamame Shrimp (Litopenaeus vannamei) with a model without water exchange using molasses as an organic carbo source. Molasses can increase the growth of heterotrophic bacteria in shrimp ponds with a model without changing water. Heterotrophic has playing a role in controlling inorganic nitrogen as well as as natural food for shrimp in heterotrophic bacteria pond units. This research was carried out for two months, from March to April 2023 at the shrimp hatchery in Pantai Cermin District, Serdang Bedagai Regency, North Sumatra Province. The method used in this study is the experimental method. There were five treatments tested in the study, among others: (1) treatment without using molasses with 100 % conventional feeding ; (2) using molasses with 25% conventional feed; (3) using molasses with 50% conventional feed; (4) using molasses with 75% conventional feed and (5) using molasses with 100% conventional feed. Each treatment has three replicates. This study found that the rate of decrease in conventional feed had a significant effect on shrimp growth rate, feed conversion ratio and quality parameters in the model without water changes. The water results in this study clearly show that the best treatment in shrimp farming with a no-water exchange model uses molasses as a carbon source. The best treatment found in this study was the treatment using molasses with 75% conventional feeding rate at the level of C:N feed ratio = 20.0:1.

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