# US 2021/0329856 A1 · Simplified cultivation method without wheat-corn rotation system in huang-huai-hai plain > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0329856 A1 - Document ID: US20210329856A1 - Status: Published application - Kind: A1 - Application number: 17/232,040 - Filed: 2021-04-15 - Published: 2021-10-28 - Earliest claimed: 2020-04-27 - Assignees: Crop Research Institute, Shandong Academy of Agricultural Sciences - Applicants: Crop Research Institute, Shandong Academy of Agricultural Sciences - Inventors: Kaichang LIU; Zongxin LI; Haijun ZHAO; Shengdong LI; Ping LIU - Web page: https://patentgrep.com/patent/US20210329856A1 ## CPC - A01G 22/20: Cereals - Y02A 40/28: specially adapted for farming - 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) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract The present disclosure relates to a simplified cultivation method without wheat-corn rotation system in Huang-huai-hai Plain. Aiming at making the most of regional light, temperature and water resources to increase the annual wheat-corn grain yield, the method optimally integrates cultivation technologies for two crops to achieve the objective of complementary, comprehensive and balanced annual grain production. The technical core of the method is as follows: directly planting corn with minimal tillage under no soil ploughing but straw mulching after corn harvest, and directly planting wheat with minimal tillage under no soil ploughing but straw mulching after wheat harvest, thereby realizing zero crop rotation in annual wheat-corn planting in the Huang-huai-hai Plain, making the most of light and temperature resources and increasing regional annual grain yield. ## Claims ### Claim 1 A simplified cultivation method without wheat-corn rotation system, wherein the method comprises the following steps: directly planting corn with minimal tillage under no soil ploughing but straw mulching after corn harvest, and directly planting wheat with minimal tillage under no soil ploughing but straw mulching after wheat harvest, thereby realizing zero crop rotation in annual wheat-corn planting, making the most of light and temperature resources and increasing regional annual grain yield. ### Claim 2 (depends on 1) The method according to claim 1, wherein a process after corn harvest in conventional production is changed to one-step process of leveling and seeding in a wheat seedbed; for corn planting, conventional direct stubble seeding of corn is changed to leveling and seeding in a corn seedbed. ### Claim 3 (depends on 2) The method according to claim 2, wherein the wheat is seeded on the day or the next day after corn harvest; and the corn is seeded on the day or the next day after wheat harvest. ### Claim 4 (depends on 3) The method according to claim 3, wherein the wheat is seeded on the day after corn harvest; and the corn is seeded on the day after wheat harvest. ### Claim 5 (depends on 2) The method according to claim 2, wherein a no-tillage fertile-seeding drill is used for completing the process of leveling and seeding in the wheat seedbed; preferably, 2BMF Wheat No-tillage Planter is used. ### Claim 6 (depends on 1) The method according to claim 1, wherein technical parameters of wheat planting are as follows: subsoiling depth of seedbed is 27-29 cm; finishing depth of seedbed is 11-13 cm; seedbed width is 17-19 cm; two rows of wheat are seeded in the seedbed, with a row spacing of 9-11 cm; both sides of the seedbed are undisturbed soil, with a width of 11-13 cm; wheat seeding depth is 3.5-4.5 cm; fertilization depth of seed fertilizer is 9-11 cm, and the fertilizer is applied 2.5-3.5 cm lateral to a wheat seed; seedbed finishing standard means that bulk density of 11-13 cm deep soil is preferably 1.1-1.2 g/cm3, and total soil porosity is 54-56%. ### Claim 7 (depends on 6) The method according to claim 6, wherein the technical parameters of wheat planting are as follows: the subsoiling depth of seedbed is 28 cm; the finishing depth of seedbed is 12 cm; the seedbed width is 18 cm; two rows of wheat are seeded in the seedbed, with a row spacing of 10 cm; single side or both sides of the seedbed are undisturbed soil, with a width of 12 cm; the wheat seeding depth is 4 cm; the fertilization depth of seed fertilizer is 10 cm, and the fertilizer is applied 3 cm lateral to a wheat seed. ### Claim 8 (depends on 1) The method according to claim 1, wherein a no-tillage fertile-seeding drill is used for completing the leveling and seeding in the corn seedbed; preferably, a Lovol MaterMacc vacuum precision planter is used. ### Claim 9 (depends on 1) The method according to claim 1, wherein technical parameters of corn planting are as follows: subsoiling depth of corn seedbed is 19-21 cm; a row of corn is seeded in the seedbed; seedbed width is 9-11 cm; single side or both sides of the seedbed are undisturbed soil, with a width of 34-36 cm; row spacing of corn is 44-46 cm; finishing depth of seedbed is 7-9 cm; corn seeding depth is 2.5-3.5 cm; fertilization depth of seed fertilizer is 14-16 cm, and the fertilizer is just applied below the corn seed; seedbed finishing standard means that bulk density of 7-9 cm deep soil is preferably 1.1-1.2 g/cm3, and total soil porosity is 54-56%; preferably, the fertilizer is a slow-release fertilizer. ### Claim 10 (depends on 1) The method according to claim 1, wherein the technical parameters of corn planting are as follows: the subsoiling depth of corn seedbed is 20 cm; a row of corn is seeded in the seedbed; the seedbed width is 10 cm; single side or both sides of the seedbed are undisturbed soil, with a width of 35 cm; the row spacing of corn is 45 cm; the finishing depth of seedbed is 8 cm; the corn seeding depth is 3 cm; the fertilization depth of seed fertilizer is 15 cm.