The research aimed at assessing the effects on nutrient digestion and ruminal fermentation by goats of a complete feed block (CFB) that incorporated agro-industrial by-products that were high in fibre and cellulolytic bacteria. Three Kacang goats, a native Indonesian breed, were used in a 3 × 3 Latin square experimental design with i) CFB without microbes (control), ii) CFB containing 1% Pseudomonas aeruginosa and 1% Acinetobacter baumannii, and iii) CFB containing 2% P. aeruginosa and 2% A. baumannii. Microbes in the CFBs consisted of lactic acid bacteria, yeast and cellulolytic bacteria that ranged from 106 to 108 cfu/g. The goats were fed each day at 08h00 and 16h00. The inclusion of P. aeruginosa and A. baumannii at 2% level reduced both neutral detergent fibre (NDF) and acid detergent fibre compared with other treatments. Goats fed on CFB with microbes had higher (P <0.01) digestibility of organic matter (OM) and NDF compared with control. The addition of P. aeruginosa and A. baumannii at 2% level increased (P <0.05) ruminal ammonia nitrogen (N-NH3), acetate, and total VFA. However, goats fed on CFB with microbes had lower (P <0.05) urinary N excretion, which improved (P <0.05) N retention compared with the control. It was concluded that a combination of lactic acid bacteria, yeast and cellulolytic bacteria in the CFB could modify fermentation in the rumen and increase the use of nitrogen in goats.
Tujuan penelitian ini adalah untuk mengevaluasi nilai nutrisi dan karakteristik fermentasi silase rumput raja yang diberi perlakuan penambahan inokulan cair atau kering bakteri asam laktat (BAL). Penelitian ini disusun dengan rancangan acak lengkap dengan 4 perlakuan dan 3 ulangan. Empat perlakuan yaitu (A) rumput raja tanpa inokulan BAL sebagai kontrol; (B) rumput raja + 30 mL inokulan cair BAL/kg hijauan segar; (C) rumput raja + 30 g inokulan kering beku BAL/kg hijauan segar; (D) rumput raja + 30 g inokulan kering sentrifugasi BAL/kg hijauan segar. Inokulan cair BAL disemprot pada permukaan rumput dan selanjutnya dicampur hingga rata. Konsentrasi awal BAL pada semua perlakuan adalah 1,0 × 10 6 cfu/g. Sebanyak 500 g bahan silase diensilase dalam silo plastik dan disimpan pada temperatur ruang (28 o C) selama 30 hari. Hasil penelitian menunjukkan bahwa nilai pH, konsentrasi asam laktat, N-amonia (N-NH 3), asam butirat, total volatile fatty acids (VFA) serta Nilai Fleigh dipengaruhi oleh perlahuan inokulan BAL. Silase yang diberi perlakuan inokulan cair atau kering BAL memiliki nilai pH lebih rendah (P<0,01) dibandingkan silase kontrol. Konsentrasi N-NH 3 dan asam butirat signifikan lebih rendah (P<0,01) pada silase yang diberi perlakuan inokulan cair atau kering BAL dibandingkan silase kontrol. Silase yang diberi perlakuan inokulan BAL kering sentrifugasi memiliki Nilai Fleigh tertinggi (P<0,05) dibanding silase lain. Kecernaan neutral detergent fiber (NDF) in vitro lebih tinggi (P<0,05) pada silase yang diberi perlakuan inokulan BAL dibandingkan silase kontrol.
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