条件筛选
-
Natural color-enhancing feeds for laying hens include pine needles, black locust leaves and mugwort leaves
Pine needle powder: made by air-drying and grinding pine needles. Generally, adding 3 percent to 5 percent to the feed gives a good color-enhancing effect, and can increase the egg production rate by 13 percent. Black locust leaf powder: the added amount of black locust leaf powder accounts for 5 percent of the feed, and the effect is better than pine needles; the yolk color can be raised from grade 1 to grade 9 and can remain stable without changing. Mugwort leaf powder: mugwort leaves contain nutrients such as fat, protein and various amino acids. Adding 2 percent to 3 percent mugwort leaf powder to the chicken diet can increase egg production by 12 percent to