The Effect of Fermentation Time with Probiotic Bacteria on Organic Fertilizer as Daphnia magna Cultured Medium towards Nutrient Quality, Biomass Production and Growth Performance Enhancement

3rd International Conference on Tropical and Coastal Region Eco Development 2017

地球科学;生态环境科学

Herawati, Vivi Endar^1 ; Nugroho, Ristiawan Agung^1 ; Pinandoyo^1 ; Darmanto, Y.S.^2 ; Hutabarat, Johannes^1

Department of Aquaculture, Faculty of Fisheries and Marine Science, Diponegoro University, Jl Prof Soedarto, SH, Tembalang, Semarang

50275, Indonesia^1

Department of Food Science, Faculty of Fisheries and Marine Science, Diponegoro University, Jl Prof Soedarto, SH, Tembalang, Semarang

50275, Indonesia^2

关键词: Biomass productions;    D. magna;    Essential amino acids;    Fermentation time;    Nutrient values;    Population densities;    Probiotic bacteria;    Specific growth rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/116/1/012089/pdf
DOI  :  10.1088/1755-1315/116/1/012089

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The nutrient quality and growth performance of D. magna are highly depend on the organic fertilizer which is used in its culture medium. The objective of this study was to identify the best fermentation time by using probiotic bacteria on organic fertilizer as mass culture medium to improve its nutrient quality, biomass production, and growth performance. This study was conducted using completely randomized experimental design with five treatments and three repetitions. Organic fertilizers used cultured medium with chicken manure, rejected bread and tofu waste fermented by probiotic bacteria then cultured for 0, 7, 14, 21 and 28 days. The results showed that medium which used 25% chicken manure, 25% tofu waste and 50% rejected bread cultured for 28 days created the highest biomass production, population density and nutrient content of D. magna those are 233,980 ind/L for population density; 134.60 grams for biomass production, 0.574% specific growth rate; 68.06% protein content and 6.91% fat. The highest fatty acid profile is 4.83% linoleic and 3.54% linolenic acid. The highest essential amino acid is 53.94 ppm lysine. In general, the content of ammonia, DO, temperature, and pH during the study were in the good range of D. magna life. The conclusion of this research is medium which used 25% chicken manure, 25% tofu waste and 50% rejected bread cultured for 28 days created the highest biomass production, population and nutrient content of D. magna.