TY - JOUR T1 - Comparison Nutritive Value of Spirulina platensis Algae with some Protein Meals used in Ruminant Nutrition TT - مقایسه ارزش تغذیه ای جلبک اسپیرولینا پلاتنسیس (Spirulina platensis) با برخی کنجاله های پروتئینی مورد استفاده در تغذیه نشخوارکنندگان JF - rap JO - rap VL - 10 IS - 24 UR - http://rap.sanru.ac.ir/article-1-941-en.html Y1 - 2019 SP - 27 EP - 36 KW - Chemical Compositions KW - Degradability KW - Digestibility KW - Gas Production KW - Protein Meals KW - Ruminal KW - Spirulina Platensis Algae N2 - This study was conducted to determine of chemical composition, ruminal dry matter and crude protein degradability, gas production, organic matter digestibility, metabolizable energy, net energy for lactation and short chain fatty acids of Spirulina platensis algae and its comparison with soybean, canola, sunflower and cotton seed meals in cattle. The experiment of ruminal degradability conducted using two Taleshi steers with approximately 350 kg body weight at 0, 4, 8, 12, 24 and 48 hours incubation. Gas production technique was used for organic matter digestibility, metabolizable energy, net energy for lactation and short chain fatty acids of experimental treatments. For this propose, rumen liquid were taken from three fistulated Taleshi steers with approximately 335 kg body weight. Spirulina algae had the highest percentage (67.69%) of crude protein among experimental treatments (P= 0.0001). Potential (a+b) of ruminal dry matter degradability of Spirulina algae (98.69%) was significantly more than other experimental treatments (P= 0.0001). Spirulina algae had the highest amount (97.36%) of a+b fraction of crude protein degradability among experimental treatments (P= 0.0001). Potential of gas production of Spirulina algae (35.77 ml/g DM) was significantly more than sunflower meal but it was significantly lower than soybean, canola and cotton seed meals (P= 0.0001). Organic matter digestibility (70.18%) and metabolizable energy (9.86 MJ/kg DM) of Spirulina algae were significantly more than sunflower and cotton seed meals but it was significantly lower than soybean and canola meals (P= 0.0001). Net energy for lactation (3.47 MJ/kg DM) and short chain fatty acids (0.61 M mol/g DM) of Spirulina algae had no significant difference with sunflower meal but it was significantly lower than other experimental treatments (P= 0.0001). Results of this study showed that Spirulina algae have more crude protein than usual protein meals which use in ruminant nutrition and its protein degradability is very high in the rumen. Therefore, Spirulina algae can be used as a fast degradable protein source in the ruminant diet. M3 10.29252/rap.10.24.27 ER -