Chemical Composition and Metabolizable Energy of Mustard Meal

Abstract

Mustard meal (MM), which is a residue of essential oil extraction, had high moisture content (77%). It took 3 days to dry under the sun or 48 hours to dry in an electrical oven at 65°C or 8 hours in a gas heated pan of initial temperature 120-140°C. The chemical composition of MM from the 3 drying processes was similar. It contained on DM basis 30-32% CP with relatively high EE (19-22%) and CF (12-13%), while ash and NFE were 5-6% and 28-31%. Metabolizable energy (ME) of the samples from the 2 among the 3 drying processes was determined. The result revealed that although the CP content of MM was only 50% of soybean meal (SBM), it had higher EE. Therefore its ME value was higher than SBM. The apparent ME and true ME of sun-dry MM was 2.888 and 3.348kcalg DM (or 2.724 and 3.161kcal/g air dry), while those of gas dried meal was lower, i.e. 2.435 and 2.892kcalg DM (or 2.328 and 2.765kcal/g air dry), respectively.

Keywords

• mustard meal
• plant protein
• chemical composition
• metabolizable energy
• poultry