Abstract
The major costs of cultivating S. platensis are for media and labor. The aim of this study
was to explore the use of goat manure as culture medium for S.platensis. A complete
randomized block design was used in this study with 5 treatments of goat manure
concentration, each of which was repeated 5 times. The results of the study showed that
the growth of S.platensis at 25 g/L concentration of goat manure was significantly
(P<0.05) lower than 50, 75, 100 g/L and Zarrouk media. S.plantesis productivity at a
concentration of 25 g/L goat manure (0.128±0.011 g/L/day) was significant (P<0.05)
lower than 50 (0.153±0.012 g/L/day), 75 (0.158±0.014 g/L/day), 100 g/L (0.153±0.009
g/L/day) and Zarrouk media (0.164±0.016 g/L/day). Protein content in S. platensis at
50 (59.03±4.31%), 75 (62.56±6.04%) and 100 g/L (61.22±4.54%) goat manure and
Zarrouk (63.21±5.97%) media were significantly (P<0.05) higher than 25 g/L
(47.35±5.16%). Lipid content in S. platensis at Zarrouk media (5.28±0.38%), 50 g/L
(5.31±1.27%), 75 g/L (5.37±1.25%) and 100 g/L (5.42±1.35%) goat manure were
significantly (P<0.05) lower than 25 g/L (7.86±1.16%). Carbohydrate content in S.
platensis at Zarrouk (22.58±2.38%), 50 g/L (21.67±2.25%), 75 g/L (22.43±2.14%) and
100 g/L (22.67±2.38%) goat manure were significantly (P<0.05) lower than 25 g/L
(27.69±1.78%). Chlorophyll content in S. platensis at Zarrouk and goat manure with
50, 75 and 100 g/L concentration were significantly (P<0.05) higher than 25 g/L
(1.36±0.15%). We conclude that the concentration of goat manure 75 g/L in S.platensis
cultivation media was the optimum concentration and has the potential to replace inorganic media.
Tatang Sopandi, Siti Rohmah, Siti Aminullo Tri Agustina. (2020) Biomass and nutrient composition of Spirulina platensis grown in goat manure media, Asian Journal of Agriculture and Biology, Volume 8, Issue 2.
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