Abstract
One of the problems of aquaculture is the high cost of feed. Therefore, how to minimize the feed cost is of the main goals. It is necessary to find out natural sources that can be used as alternative feed. Wolffia globosa is an aquatic weed that is presumed to be used as an alternative feed source. Study the nutritional content of the Wolffia was conducted in June 2019, while the growth ability was conducted both outdoors and indoors in July 2019 at Research Center for Limnology Laboratory, LIPI. The W. globosa (percentage in dry weight) contained protein: 45.54%, fat: 5.33%, crude fiber: 9.98%, ash: 20.43%, and Nitrogen Free Extract:19.21%. It also contains 15 types of amino acids as much as 1.51 %w/w. At the outdoor system culture, the Wolffia has daily growth rate/GR (g/day) was 64.62−120.6, specific growth rate/SGR (%/day) was 14.622-15.333, and the daily productivity/P (g/m2/day) was 97.757−176.659. While at the indoor system culture the value of GR (g/day), SGR (%/day), and P (g/m2/day) were 0.675−1.50; 9.889−12.643; and 25.883−64.564 respectively. It is indicated that this Wolffia is very potential to be an alternative natural feed source for aquaculture or another purpose and needs further research.
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