Potential of water hyacinth (Eichhornia crassipes (Mart.) Solms) in Rawapening lake as raw material for fish feed

Abstract

Feed is a major factor in determining the success of aquaculture business. The quality and quantity of feeding properly will maximize the growth of fish. Various research and application of technology has been made to obtain alternative feed source so as to reduce the level of dependence on the food production industry. The eutrophication condition of Rawapening Lake has triggered the water hyacinth (Eichhornia crassipes (Mart.) Solms) to grow out of control. It speeds up the loss of water weeds, cover the surface of the water into the fishing area and degrade water quality. The purpose of this study was to determine the potential of water hyacinth as an alternative fish feed ingredient. In addition, it is also an effort to control the growth of water hyacinth in Rawapening Lake. The descriptive analysis method with a quantitative approach was chosen in this study. After making flour, water hyacinth has a protein content of 12.51%. Water hyacinth fine flour mixed with other ingredients including fish meal and fish feed bisamenghasilkan rice bran protein content of 30.2477%. The results of testing the stability of feed in water (Water Stability Feed) showed that the feed was destroyed after being immersed in cold water for 17 hours. The buoyancy test shows the feed is classified as a submerged type. The feed sinks because it has a specific gravity which is greater than the specific gravity of water. The feed hardness test shows that the feed is not destroyed after being given a load of 500 grams. The heavier the load that the feed can hold, it means the feed is getting harder. Protein content of 30.2477% indicates that alternative fish feed has competitive quality because it is able to meet the protein needs of cultivated fish. Especially fish cultivated in tropical areas which have lower protein requirements (20-30%).

Revitalization of Rawa Pening lake, Indonesia

“…On the other hand, water hyacinth has the potential to be used as phytoremediation, paper, organic fertilizer, biogas production, human food, fiber, livestock feed, as an ornamental plant and even its biomass has the potential to be a source of renewable energy (Jafari, 2010;Rezania et al, 2015). The same thing happened to Rawa Pening Lake with the hyacinth growth rate ranging from 6.40-7.26%/day (Prasetyo et al, 2022), which can trigger the lake siltation because the root system of hyacinth allows high sediment trapping. The measurements of sedimentation and water quality of Rawa Pening Lake conducted in 2015 revealed that the lake underwent shrinking and siltation which resulted in the effective area of the lake becoming 1,850 ha with a reservoir volume of 48.15 million m3 (elevation +463).…”

Impact Analysis of The Benefits of Heach Heater (Eichornia Crassipess) for The Environment in The Batu Jai Dam Area, Central Lombok District

“…Water hyacinth (Eichornia crassipes) is an aquatic weed that has a high growth rate so it can damage the aquatic environment (Kurniadie et al, 2023;Prasetyo et al, 2022), including increasing evapotranspiration (evaporation and loss of water through the leaves within 52 days, each water hyacinth stem is capable of producing 1 m 2 of new plants. The use of water hyacinth plants as fertilizer because the remaining organic matter Sofyan et al (2023), from these plants contains a lot of macro nutrients such as N, P, K which are needed for the growth of cultivated plants (Peng et al, 2023).…”