KAJIAN SIFAT KIMIA DAN ORGANOLEPTIK YOGURT JAGUNG MANIS (Zea mays saccharata) DENGAN MENGGUNAKAN BEBERAPA JENIS INOKULUM

Abstract

This study aimed to determine the chemical and organoleptic sweet yogurt corn by using some types of inoculum. The design used was completely randomized design (CRD) with a single factor, namely the type of inoculum (I), which consists of 4 treatments I1 (addition of Lactobacillus casei 10% ), I2 (addition of  Lactobacillus bulgaricus 10%), I3 (addition Bifidobakterium longum 10%) and I4 (addition of Streptococcus termophilus 10%). The treatments was repeated 4 times. The parameters observed pH, total acid, total lactic acid bacteria, appearance, aroma and taste. The data were tested by analysis of variance at 5% significance level using software Co-Stat. Significantly different treatments were tested further using Honestly Significant Difference (HSD) with the same real level. The results showed that the addition of inoculum gave a significantly different effect on the total of acid and flavor of sweet corn yogurt by scoring test, but gave not significantly different effect on pH, appearance, aroma, flavor by hedonic test, appearance and aroma by scoring test. the addition of Streptococcus termophilus inoculum was the best treatment with pH 3.87, total acid 0.031%, total lactic acid bacteria 6,8x10⁸ cfu/ml and can be accepted by panelists with the rather thick of a appearance, slightly flavor of yogurt and slightly sour of taste.

Keywords: sweet corn, type of inoculum, yogurt.

ABSTRAK

Penelitian ini bertujuan untuk mengetahui sifat kimia dan organoleptik yogurt jagung manis dengan menggunakan beberapa jenis inokulum. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan faktor tunggal yaitu jenis inokulum (I), yang terdiri dari 4 perakuan yaitu I1 (penambahan Lactobacillus casei 10%), I2 (penambahan Lactobacillus bulgaricus 10%), I3 (penambahan Bifidobakterium longum 10%) dan I4 (penambahan Streptococcus termophilus 10%) masing-masing perlakuan diulang sebanyak 4 kali. Parameter yang diamati meliputi pH, total asam, total bakteri asam laktat, penampakan, aroma dan rasa. Data hasil pengamatan diuji dengan analisis keragaman pada taraf nyata 5% menggunakan software Co-Stat. Perlakuan yang berbeda nyata diuji lanjut menggunakan Beda Nyata Jujur (BNJ) dengan taraf nyata yang sama. Hasil penelitian menunjukkan bahwa penambahan inokulum memberikan pengaruh yang berbeda nyata terhadap total asam dan rasa yang diuji secara skoring yogurt jagung manis, namun memberikan pengaruh yang tidak berbeda nyata terhadap pH, penampakan, aroma dan rasa rasa secara hedonik. Penambahan inokulum Streptococcus termophilus merupakan perlakuan terbaik dengan pH 3,87, total asam 0,031%, total bakteri asam laktat 6,8x10⁸ cfu/mldan dapat diterima oleh panelis dengan penampakan agak kental, agak beraroma khas yogurt dan rasanya agak asam.

Kata kunci :jagung manis, jenis inokulum, yogurt.