Karasteristik jus dari silase jagung berbeda umur serta kemampuannya dalam menghambat escherichia. Coli dan salmonella sp

Abstract

Penelitian bertujuan untuk mengkaji dan membandingkan karakteristik jus silase jagung umur 45 hari dengan 365 hari serta mengkaji kemampuannya dalam menghambat Escherichia coli dan Salmonella sp. yang diisolasi dari pedet sapi perah yang sedang diare akut. Jus dipabrikasi bersamaan dengan produksi silase jagung dan diisolasi melalui pengepresan berbantuan dongkrak hidrolik. Masing masing jus dievaluasi komposisi dan kandungan asam organik, pH dan jumlah bakteria asam laktat (BAL). Hasil penelitian menunjukkan bahwa jus silase mempunyai pH 2,98–4,47; BAL 0,3 x 108–2,2 x 108CFU/ml dan asam laktat 0,07–0,4 g/l. Satu kilogram silase berkadar air 55% dapat menghasilkan 275 gr jus. Jus silase umur 45 hari dan 365 hari mempunyaikarakteristik sebagai berikut pH: 2,98 ± 0,06 vs 4,47 ± 0,3 2; asam laktat: 0,4 ± 0,05 vs 0,07±0,06 g/l; dan total BAL: 2,2 x 108vs 0,3 x 108CFU/ml. Kedua jus mampu menghambat pertumbuhan Escherichia coli dan Salmonella sp., namun daya hambat jus dari silase umur 365 hari lebih rendah dari jus silase umur 45 hari. Dapat disimpulkan bahwa karakteristik dan daya hambat jus silase melawan Escherichia coli dan Salmonella sp. semakin menurun seiring dengan semakin tuanya umur silase.

The objectives of this research were to study and compare the juice characteristics of corn silage age 45 days and 365 days and study its capability to inhibit Escherichia coli and Salmonella sp. isolated from acute diarrhea of dairy calf. Juice was manufactured in conjunction with the production of corn silage and the juice was isolated by pressing silage using hydraulic pump. Each juice was evaluated for its composition and organic acid content, pH and the concentration of lactic acid bacteria (LAB). The results showed that the silage juice has a pH of 2,98–4,47; BAL 0,3 x 108–2,2 x 108 CFU/ml, and lactic acid 0,07–0,4 g/l. One kilogram of silage with 55% water resulted 275 grams of juice. Juice from silage age 45 days and 365 days had the following characteristics: pH was 2,98 ± 0:06 4:47 ± 0,3 vs. 2 ; lactic acid concentration was 0,4 ± 0:05 vs. 0:07 ± 0,06 g/l, and total BAL was 2,2 x 108 vs. 0,3 x 108 CFU/ml. All juices were capable of inhibiting the growth of Escherichia coli and Salmonella sp., but its inhibition was lower for the juice from silage age 365 days compared with that of 45 days. It is concluded that the quality of juice was decreased as increasing the age of silage with special reference on decreasing inhibiton of Escherichia coli and Salmonella sp.