Rice and cray synergetic ecological breeding method

The invention discloses a rice and cray synergetic ecological breeding method. Soil is loosened and insect pests are removed for rice by breeding crays. According to the characteristic of rice absorbing nutritional elements in a water body and a shading action, the breeding water body is purified, habituating and concealing places are also provided for the crays, a good growth environment is created for the crays, and the quality of the cray breeding product is improved. The metabolic products of the crays and feces of the crays increase organic fertilizers for production of rice in the comingyear, so that rich organic fertilizers can be provided for growth of rice. Dosages of chemical fertilizers and pesticides are reduced in the rice planting process to promote growth. Meanwhile, the space of the rice paddy is utilized effectively. In the water quality keeping aspect, organic components in soil and feeds are decomposed to ammonia, so that the ammonia and nitrogen content in the water body is increased. The