Abstract: | Purpose: This test is to add Calsporin (Bacillus subtilis)into breeder hens in later material and research on whether it can slow down the Descent speed of the rate of laying eggs in late period, improve the quality of eggshell, egg fertilization rate and avail-able seedling rate.Method: Experiment with 2 house chicken group, each house has about 7 000 birds, The test group using conven-tional feed. The full test by test feed and conventional feed compared to only add more Calsporin, test material per ton with the mate-rial to add 300 g while other feed ingredients are the same. Feeding method adopts free feeding, feeding time and the number of times keep consistent with conventional drugs every day, when use conventional drugs in prevention and treatment, choose varieties of drugs, time and quantity of medication the same. Research shows that Broiler breeder egg production post-material to add Calsporin con-tribute to the stability of egg production rate, improve egg eggshell quality, increase the fertilization rate and day-old chicks available for sale rate. |