100-300g/mu/m, diluted and soaked with water 0/0 times of 1 hour, and then evenly spread over the whole pond, with the maximum dosage of 300g for the first time.

Bacillus subtilis is a kind of Bacillus. Single cell is 0.7 ~ 0.8× 2 ~ 3 microns, and the color is uniform. No capsule, no periflagella, you can exercise. The surface of colonies is rough and opaque, dirty white or yellowish, and wrinkles often form when growing in liquid culture medium. Aerobic bacteria protein, various sugars and starch can be used to decompose tryptophan to form indole.