Inclusion of amaranth (Amaranthus sp.) as a protein source in the di-ets of lactating dairy goats

Resumen

Objective: To determine the productive performance and milk quality of goats, including two levels of popped amaranth in their diet.

Methodology: Forty-five lactating goats, randomly distributed into three groups of 15, were studied. Each group was allocated a treatment that matched the isoenergetic and isoproteic diets with increasing percentages of popped amaranth grain, in replacement of soybean meal: T1, 0%; T2, 20%; and T3, 30%. Data were collected across three intervals during the 45-day experimental period. Milk production was recorded, along with its crude protein (CP), fat, and total solids (TS) content.

Results: Milk production differed significantly (p<0.05) between treatments, increasing as the amount of amaranth in the diet increased, with values of 1.35, 1.38, and 1.65 kg d⁻¹ for T1, T2, and T3, respectively. Milk composition did not record any difference between treatments, with averages of 28.07, 32.89, and 113.7 g kg⁻¹ of milk for crude protein (CP), fat, and total solids (TS), respectively.

Study Limitations/Implications: Given the exploratory nature of this study, determining the functional components of milk is required to complement the study.

Conclusions: Amaranth grain can be used as a protein source in animal feed. Including 30% of amaranth in the diet of dairy goats has been proven to increase production compared to conventional protein sources. However, no changes were observed in the main milk components.