| Abstrakt: |
In addition to chemical composition, modern formulations of ruminant rations also require data on nutrient degradation of feed ingredients in the rumen. It is related to the synchronization of nutrient requirements for rumen microbial protein synthesis and nutrient bypass for livestock production. This study aimed to determine the chemical composition and nutrient degradation kinetics from several tropical tree legume leaves using in situ method. This study was arranged based on a Completely Randomised Design with five treatments (different types of legume leaves) and six replications. Five types of local tree legume leaves were tested, namely Leucaena leucocephala (LL), Sesbania grandiflora (SG), Bauhinia purpurea (BP), Acacia mangium (AM), and Samanea saman (SS). Approximately 5 g of dried ground samples that passed through a 3 mm screen size were put into nylon bags. The bags were subsequently incubated in the rumen of two fistulated male Ongole crossbred cattle for 0, 6, 12, 24, 48 and 72 hours. Parameters observed in this study were the actual degradation of dry matter (DDM), organic matter (DOM), crude protein (DCP) and their kinetic degradation profiles and effective degradation. The results showed that the chemical composition and characteristics in situ varied. S. saman had the highest crude protein content, followed by L. leucocephala, S. grandiflora, B. purpurea, and A. mangium with the values of 26.9%, 26.3%, 24.9%, 17.9%, and 14.3% (dry matter basis), respectively. Sesbania grandiflora had the lowest fiber content (neutral detergent fiber) compared to other samples with a value of 31.35%, then increased in LL SS, BP and AM samples with sequential values of 34.16%, 45.61%, 46.04% (in dry matter basis), respectively. Sesabania grandiflora had the highest effective values of degradation of dry matter, organic matter and crude protein compared to other samples, with values of 60.04%, 61.93% and 64.58%, respectively. It was concluded that each leaf of the tropical tree legume varied in chemical composition and in situ nutrient degradation characteristics. Sesbania grandiflora has the highest effective degradability value of the dry matter, organic matter and crude protein compared to other legume leaves. [ABSTRACT FROM AUTHOR] |
