Method for micro-ridge mixed-sowing cultivation of rice

A method for micro-ridge mixed-sowing cultivation of rice, comprising the following steps:

• S1:
• draining away water at a maturity stage of a preceding crop until reaching a state allowing a harvester to operate;
• S2:
• harvesting the preceding crop, leaving standing stubble, smashing stalks of the preceding crop to obtain smashed stalks, and then spreading the smashed stalks on the standing stubble to form a rhizosphere layer for rice growth;
• S3:
• trenching a field to form a plurality of ecological trenches, wherein ecological trenches comprise a trench body, side cracks, and bottom mud;
• S4:
• flattening the standing stubble and the smashed stalks on a seedbed surface to form an underlying surface;
• thoroughly mixing rice seeds, chemical fertilizers and soil at a mass ratio of 6 to 14:50 to 70;
• and 6,000 to 10,000 to produce seed-fertilizer-soil compounds, molding the seed-fertilizer-soil compounds into a ridge shape and falling the seed-fertilizer-soil compounds on the underlying surface to form a plurality of ecological ridges, wherein ecological ridges of the plurality of ecological ridges are formed between adjacent ecological trenches of the plurality of ecological trenches, each of the plurality of ecological ridges is a trapezoid with a bottom width of 5.5 cm to 9.5 cm, a top width of 1.5 cm to 3.5 cm and a height 3.5 cm to 6.5 cm, an ecological depression comprising a sponge layer, a topsoil layer, and ecological cracks is formed between adjacent ecological ridges of the plurality of ecological ridges, and after performing a sowing, an irrigation is carried out once in a manner, wherein the manner comprises:
• draining irrigation water shortly after the irrigation, without leaving a water layer in the field.