Eichhornia crassipes aquatic plant management technology for water resources enhancement

Abstract

Degradation of inland waters, rivers, lakes, reservoirs, swamps, and other fish feeding areas for fish farming are increasing, resulting in the impact of fish production and the environmental health of the waters. Eichhornia crassipes is a floating aquatic that is highly invasive in hypertrophic water. The proliferation of water hyacinth closure from the surface water column by decreasing the concentration of dissolved oxygen in the bottom water column, causing disturbance to the growth of aquaculture fish, so it is necessary to control/eradicate the water hyacinth weed. The technology to control/eliminate water hyacinth is physical, biological, and chemical or a combination of the three. Technology to control/eradicate water hyacinth must consider the negative impact on the environment. Some technologies to eradicate water hyacinth are positive and significant using filled Chinese carp (Ctenopharyngodon idella) or confined in cages depending on the body of water. The caged system in lake waters considers fish and native/endemic plants while in reservoir water with a stocking system. In the lake waters, aquaculture is carried out with a floating net cage system measuring 5 × 5 × 5 m3 with a total of 100 plots, each plot filled with 500 Chinese carp (100 g/fish) fed 50 kg of water hyacinth on day-1. The maintenance period is 3 months per season for 3 seasons (1 year). The results show that water hyacinth is reduced by 300 ha. The adoption of technology to improve water quality is one of the management of water bodies to increase fish production.