| Penulis/Author |
Prof. Dr. Ir. Kustantinah, DEA., IPU (1); Nur Hidayah (2) ; Ir. Cuk Tri Noviandi, S.Pt., M.Anim.St., Ph.D., IPM., ASEAN Eng. (3); Ir. Andriyani Astuti, S.Pt., M.Sc., Ph.D., IPM., ASEAN Eng. (4); Dimas Hand Vidya Paradhipta, S.Pt., M.Sc., Ph.D. (5) |
| Abstrak/Abstract |
Indonesia is one of the tropical countries with the largest diversity of algae, but studies on identifying the nutrients content of 12 numerous algal species from tropical oceans and their potential as ruminant feed have not been widely reported. This study was 13 designed to evaluate the nutrient, macro and micromineral content of brown (Laminaria sp. and Padina australis) and red algae 14 (Eucheuma cottonii and Gracilaria sp.) from Kelapa beach, Tuban, East Java. All tests were carried out in duplicate from individual 15 algae and data were analyzed descriptively by calculating the average of data obtained. The result showed that all off algal species in 16 this experiment had a high content of water (69.41-86.33%) and ash/mineral (23.42-65.63%). The brown algae Padina australis had the 17 highest DM (30.59%) and CP (12.57%). The red algae of Gracilaria sp. had the highest ash (65.63%) and the lowest OM (34.37%), EE 18 (0.21%), CF (2.49%), NFE (19.95%), NDF (21.74%), ADF (5.46%), and gross energy (1,083 Cal/g); however, in contrast, Eucheuma 19 cottonii had the highest OM (76.58%), EE (2.85%), CF (8.80%), NFE (56.38%), NDF (56.93%), ADF (11.44%), and gross energy 20 (2,911 Cal/g) but the lowest DM (13.67%) and CP (8.55%). The brown algae Padina australis had the highest Na (0.89%), Mg (4.90%), 21 and Cd (3.73 ppm) contents. The red algae of Gracilaria sp. had the highest K (2.18%), Ca (5.80%), Fe (7,596 ppm), Mn (818 ppm), Cu 22 (5 ppm), Zn (52 ppm), and Pb (60.38%); however, in contrast, Eucheuma cottonii had the lowest P (0.01%), K (2.02%), Ca (0.64%), Mg 23 (1.09%), Fe (400 ppm), Mn (38 ppm), Pb (17.31 ppm), and Cd (1.53 ppm) but the highest S (0.46%). Based on this study, brown algae 24 (Laminaria sp and Padina australis) and red algae (Eucheuma cottonii and Gracilaria sp.) have the potentials as ruminant feed, 25 especially as soluble carbohydrates and an organic mineral source that requires attention for heavy metals to prevent toxicity to 26 ruminants. |
