Rice field resource efficient utilization method based on rice composite planting and breeding

The invention discloses a rice field resource efficient utilization method based on rice composite planting and breeding, and relates to the technical field of agricultural circulation. The method comprises the steps of digging a fish ditch, planting rice and oilseed rape, selecting and putting fish fries, preparing an edible mushroom substrate and planting oyster mushrooms. According to the invention, rice and rapeseed processing by-product rice bran and rapeseed cake are used as main components of the fish feed to provide food for fish, rice and rapeseed straws are prepared into an edible mushroom matrix according to a proper ratio to culture oyster mushrooms, and finally residual mushroom residues are fermented into an organic fertilizer in an optimal fermentation manner to be applied to a rice field. Waste resources generated in agricultural production are fully utilized, the resource utilization rate is increased, the soil quality is improved, the earnings of fish, aquatic products and edible mushrooms a