Abstract: The present invention relates to a rice seedling substrate and a preparation method thereof, which is of the technical field of rice planting. The rice seedling substrate according to the invention was prepared from the raw materials includes the following by volume: 40-60% of dredging sediment, 30-50% of vegetable straw, and 10-30% of hickory shell. The rice seedling substrate according to the invention can not only turn waste into treasure to improve the recycling rate of sediment and agricultural and forestry waste resources, but also save the limited cultivated soils, reduce the production cost of rice seedling substrate, and promote the healthy and sustainable development of rice planting. Therefore, The inventive substrate has significant benefits in terms of economics, sociology and ecology.

Abstract: The present invention provides a set of large-scale and high-efficiency fly maggot culture equipment and a large-scale and high-efficiency fly maggot culture process and pertains to fly maggot culture. The equipment comprises at least one culturing workshop with a multi-functional ceiling. At least one feeder traveling along double-row burden distributing rails is arranged in the culturing workshop. A pair of main rails is perpendicularly arranged on the front of one ends of the burden distributing rails. A rail car used for transferring the feeder among different burden distributing rails is arranged on the main rails. Transferring rails horizontally perpendicular to the main rails are arranged on the rails car. The height of the transferring rails is consistent with the height of the distributing rails. The workshop ground between the two rails of the distributing rails form a culturing bed for fly maggot culture.

Abstract: The present invention provides a set of large-scale and high-efficiency fly maggot culture equipment and a large-scale and high-efficiency fly maggot culture process and pertains to fly maggot culture. The equipment comprises at least one culturing workshop with a multi-functional ceiling. At least one feeder traveling along double-row burden distributing rails is arranged in the culturing workshop. A pair of main rails is perpendicularly arranged on the front of one ends of the burden distributing rails. A rail car used for transferring the feeder among different burden distributing rails is arranged on the main rails. Transferring rails horizontally perpendicular to the main rails are arranged on the rails car. The height of the transferring rails is consistent with the height of the distributing rails. The workshop ground between the two rails of the distributing rails form a culturing bed for fly maggot culture.