Degradation of nitrogen fraction in kacang goats feed supplementation Calliandra calothyrsus substituted soybean meal

The aim of the study was to evaluate the use of Calliandra leaves (Calliandra calothyrsus) as a protein source in the Kacang goat’s diet and as an alternative to substitute the use of soybean meal (SBM) in goat’s diets. The proportion of C. calothyrsus feed substitution and SBM is T1 = odot grass (ad libitum) + 100 SBM; T2 = odot grass (ad libitum) + 25 C. calothyrsus + 75 SBM; T3 = odot grass (ad libitum) + 50 C. calothyrsus + 50 SBM; T4 = odot grass (ad libitum) + 75 C. calothyrsus + 25 SBM; and T5 = odot grass (ad libitum) + 100 C. calothyrsus. The last 10 days, collections was conducted include total collections of feeding, the residue of the feed, and feces. The parameters observed were intake and nutrient digestibility of dry matter (DM), crude protein (CP), neutral detergent insoluble nitrogen (NDIN) ( CP), and acid detergent insoluble nitrogen (ADIN) ( CP). Data obtained from the study were analyzed using a one-way analysis of variance, then if the results show significant differences, it will be analyzed further with Duncan’s new multiple range test. The results showed that C. calothyrsus substitution treatment of 25 to 100 (T2, T3, T4, T5) gives noticeable influence (P<0.05) for nutrient intakes, excretion (feces), and digested nutrients. The highest intake and digestible fraction of N-NDF, NADF, NDIN, and ADIN is the T5 treatment, which is the replacement of SBM with 100 C. calothyrsus (P<0.05). © 2020 Trans Tech Publications Ltd, Switzerland.