# US 12,213,412 B2 · Method for micro-ridge mixed-sowing cultivation of rice > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,412 B2 - Document ID: US12213412B2 - Status: Granted - Kind: B2 - Application number: 17/429,638 - Filed: 2021-04-26 - Published: 2022-09-29 - Granted: 2025-02-04 - Earliest claimed: 2020-08-06 - Assignees: Hunan Agriculture University - Applicants: Hunan Agriculture University - Inventors: Huang Huang; Yin Zhang; Ren Wang; Xiangsheng Gong; Zhiqiang Fu; Can Chen; Zhengjun Yu; Jingyi Li; Yugang Liang; Jiaolong Ding; Xiangjie Meng; Dan Wu; Yao Huang; Xiaolan Liao - Web page: https://patentgrep.com/patent/US12213412B2 ## CPC - A01G 22/22: Rice - A01B 49/06: for sowing or fertilising - A01B 79/02: combined with other agricultural processing, e.g. fertilising, planting - A01C 5/064: {with rotating tools} - A01C 11/003: {for aquatic plants; for planting underwater, e.g. rice} - A01C 14/00: Methods or apparatus for planting not provided for in other groups of this subclass - A01C 21/005: {Following a specific plan, e.g. pattern} - A01G 25/00: Watering gardens, fields, sports grounds or the like (special apparatus or adaptations for fertilising-liquids A01C23/00; nozzles or outlets, spraying apparatus B05B) - A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12) - A01B: SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL (making or covering furrows or holes for sowing, planting or manuring A01C5/00; mowers convertible to soil working apparatus or capable of soil working A01D42/04; mowers combined with soil working implements A01D43/12; soil working for engineering purposes E01, E02, E21) - A01C: PLANTING; SOWING; FERTILISING (parts, details or accessories of agricultural machines or implements, in general A01B51/00 - A01B75/00) ## Abstract A method for micro-ridge mixed-sowing cultivation of rice includes: S1: draining away water at the maturity stage of the preceding crop until reaching a state allowing a harvester to operate; S2: harvesting the preceding crop, leaving the stubble, smashing the stalks of the preceding crop, and then spreading the smashed stalks on the stubble to form a rhizosphere layer for rice growth; S3: trenching the field to form ecological trenches; S4: flattening the standing stubble and the smashed stalks on the seedbed surface to form an underlying surface, molding seed-fertilizer-soil compounds into a ridge shape and fall the seed-fertilizer-soil compounds on the underlying surface to form ecological ridges, wherein a plurality of ecological ridges are formed between adjacent ecological trenches, and the seed-fertilizer-soil compounds are obtained by thoroughly mixing rice seeds, chemical fertilizers and soil at a mass ratio of 6 to 14:50 to 70:6,000 to 10,000. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The method according to claim 1, wherein in S3, a spacing between the adjacent ecological trenches is 1.8 m to 8 m, and each of the plurality of ecological trenches has a depth of 45 cm to 65 cm and a width of 10 cm to 18 cm. ### Claim 3 (depends on 2) The method according to claim 2, wherein the rice seeds in S4 are germinated seeds with broken husks, and an amount of the rice seeds is 45 cm to 105 kg/ha. ### Claim 4 (depends on 2) The method according to claim 2, wherein the soil in S4 is soil thrown up during trenching in S3. ### Claim 5 (depends on 2) The method according to claim 2, wherein in S1, the drainage and a cleaning are carried out at a late maturity stage of the preceding crop. ### Claim 6 (depends on 2) The method according to claim 2, wherein a spacing within and between rows for conventional rice during sowing is 10 cm to 15 cm×17 cm to 23 cm, and a spacing within and between rows for hybrid rice is 16 cm to 22 cm×23 cm to 27 cm. ### Claim 7 (depends on 1) The method according to claim 1, further comprising S5: when the rice enters an initial tillering stage, putting 300 21-to-30-day-old ducklings per ha for weeding, pest control, disease prevention and control, and inter-tillage. ### Claim 8 (depends on 7) The method according to claim 7, wherein the rice seeds in S4 are germinated seeds with broken husks, and an amount of the rice seeds is 45 cm to 105 kg/ha. ### Claim 9 (depends on 7) The method according to claim 7, wherein the soil in S4 is soil thrown up during trenching in S3. ### Claim 10 (depends on 7) The method according to claim 7, wherein in S1, the drainage and a cleaning are carried out at a late maturity stage of the preceding crop. ### Claim 11 (depends on 1) The method according to claim 1, wherein a water management in a cultivation process comprises: after seedling emergence of the rice, maintaining the water layer at a depth of 1 cm to 2 cm; at a tillering stage of the rice, adopting a soil moisture-based irrigation, and maintaining the water layer at a depth of 2 cm to 4 cm; at a late tillering stage and when a number of tillers reaches 80% of a number of effective panicles, drying the field; at a heading-to-flowering stage and a milk stage, carrying out the soil moisture-based irrigation, maintaining the water layer at a depth of 1 cm, and irrigating within 3 to 4 days after water in the water layer is exhausted; and at a yellow ripening stage, drying the field. ### Claim 12 (depends on 11) The method according to claim 11, wherein the rice seeds in S4 are germinated seeds with broken husks, and an amount of the rice seeds is 45 cm to 105 kg/ha. ### Claim 13 (depends on 11) The method according to claim 11, wherein the soil in S4 is soil thrown up during trenching in S3. ### Claim 14 (depends on 11) The method according to claim 11, wherein in S1, the drainage and a cleaning are carried out at a late maturity stage of the preceding crop. ### Claim 15 (depends on 1) The method according to claim 1, wherein the rice seeds in S4 are germinated seeds with broken husks, and an amount of the rice seeds is 45 kg/ha to 105 kg/ha. ### Claim 16 (depends on 1) The method according to claim 1, wherein the soil in S4 is soil thrown up during trenching in S3. ### Claim 17 (depends on 1) The method according to claim 1, wherein in S1, the drainage and a cleaning are carried out at a late maturity stage of the preceding crop. ### Claim 18 (depends on 1) The method according to claim 1, wherein a spacing within and between rows for conventional rice during sowing is 10 cm to 15 cm×17 cm to 23 cm, and a spacing within and between rows for hybrid rice is 16 cm to 22 cm×23 cm to 27 cm. ### Claim 19 (depends on 1) The method according to claim 1, wherein in S3, a chain trencher is used for trenching the field. ### Claim 20 (depends on 1) The method according to claim 1, wherein in S4, the standing stubble and the smashed stalks are flattened by using a warped pressing plate; in S4, the seed-fertilizer-soil compounds pass through a drop guide before falling to the underlying surface; the drop guide conveys the seed-fertilizer-soil compounds to a shaper, and then the trapezoid is formed through the shaper to fall on the underlying surface, wherein the seed-fertilizer-soil compounds are scattered.