Nutrition Value and Growth Ability of Aquatic Weed Wolffia globosa as Alternative Feed Sources for Aquaculture System

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.

Nutritional content and growth ability of aquatic plant Azolla pinnata on wastewater of catfish

“…While the NFE content was 18.06±2.353 (16.40−19.73)%. This value is similar to W. globosa [35], but lower than reported by [32] around 33%. While the moisture of A. pinnata in this study was 90.87% (table 1), it is similar to the [32] which is 89.73%.…”

“…The number of amino acids (15 types) of A.pinnata, which are 1.60% w/w consisting of 50.625 % are nine types of Essential Amino Acid (EAA), and 49.375% of them are six types of Non-Essential Amino Acid (NEAA). The total amount of Amino Acids and composition of EAA to NEAA in A. pinnata is similar to the amount and composition of amino acids of W. globossa (1.51 %), and the EAA percentage (52.318%) is higher than NEAA (47.682%) [35]. The NEAA can be synthesized by the body itself.…”

“…The total ash content of A. pinnata in this study was 31.26±0.877 (30.64−31.88)%, remarkably higher than the results of A. pinnata in India with a value of around 23-24.% [33,34]. It is also higher than ash in duckweed Wolffia globosa by 20.43% [35]. The high ash content is thought to be related to the mineral content in this plant.…”

“…The fat content of A. pinnata has exceeded the fat requirement of fish feed by 5−10% [38]. The crude fiber was [32,33] but higher than the crude fiber content of Lemna perpussila and W. globosa [21,35]. While the NFE content was 18.06±2.353 (16.40−19.73)%.…”

Effect of Light, Aeration and Nutrient Concentration on Wolffia (Wolffia globosa (Roxb.) Hartog & Plas) Growth

“…This plant is popular for consumption due to its high nutritional value as it contains useful proteinprotein, with all nine essential amino acids in a ratio equivalent to that of egg protein, omega-3 fatty acids, dietary fiber 3,4 antioxidant, anti-inflammatory and cytotoxic activities, etc 5 . Wolffia globosa is an aquatic weed that is presumed to be used as alternative food and feed source 6 . If the amount of Wolffia can be increased, it could be a useful human food or animal feed, which will reduce food costs in the future 7 .…”