Production and economic analysis of milk from goats fed with double-distilled glycerin

Abstract

The objective of this research was to evaluate the production, milk quality, consumption and financial analysis of milk from goats consuming diets with different levels of double-distilled glycerin. Twelve multiparous Saanen goats, weighing 40 ± 6 kg and 30 ± 5 days of lactation, kept in a confinement system for 60 days were used. The goats were randomly distributed in a Latin square (4 x 4), according to the levels of double-distilled glycerin. The ingredients used were tifton hay, ground corn grain, soybean meal, vitamin/mineral supplement, urea, and double-distilled glycerin levels (0, 6, 12 and 18%) to replace corn in the diets. The milk fat of goats fed with double-distilled glycerin in the diet showed a decreasing linear regressive effect (P = 0.001). Dry matter intake showed a quadratic regressive effect (P = 0.033). Evaluating the total cost of each diet, it was observed that the level containing 0% glycerin was the diet with the lowest cost per kilogram. The use of double-distilled glycerin in the feeding of dairy goats can be recommended up to the level of 18% of corn replacement without harming milk production, however, it is necessary to verify the economic viability, considering that there will be losses in the quality of the milk produced.

Sensory analysis of goat cheese feed with sorghum silage levels in forage cactus based diets

“…With an increase in EE, it is therefore expected to increase the percentage of milk fat, as it is considered that the synthesis of lipids in the mammary gland may be affected by the input of triglycerides provided to the animals in the diet (Naumann et al, 2017). Coutinho et al (2022) evaluated the use of glycerin levels (0, 6, 12 and 18%) in the diet of goats and observed that milk fat varied with the inclusion of glycerin, with an average value of 2.17%.…”