US 12,389,819 B1
Method for near-natural long-term breeding of economic crops in wetland by using returned farmland
Mingye Zhang, Changchun (CN); Shouzheng Tong, Changchun (CN); Ming Jiang, Changchun (CN); Guodong Wang, Changchun (CN); Yu An, Changchun (CN); and Geng Cui, Changchun (CN)
Assigned to Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun (CN)
Filed by Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun (CN)
Filed on Dec. 12, 2024, as Appl. No. 18/978,211.
Claims priority of application No. 202410657766.0 (CN), filed on May 27, 2024.
Int. Cl. A01B 79/00 (2006.01); A01C 1/02 (2006.01); A01C 14/00 (2006.01); A01G 22/00 (2018.01); A01G 24/25 (2018.01)
CPC A01B 79/00 (2013.01) [A01C 1/02 (2013.01); A01C 14/00 (2013.01); A01G 22/00 (2018.02); A01G 24/25 (2018.02)] 7 Claims
OG exemplary drawing
 
1. A method for breeding of economic crops in a wetland by using a returned farmland, comprising:
selecting a site of the returned farmland and restoring a landform (S1);
selecting a returned farmland paddy field adjacent to a natural wetland as a restoration plot, excavating a soil layer of the restoration plot, and piling a ridge on a peripheral edge of the restoration plot (S11);
loosening a soil in a middle part of the restoration plot, and adding reed crushed matrix into the restoration plot and fully mixing with a loosened soil layer (S12);
excavating a V-shaped water delivery ditch with a ditch depth of 50-70 centimeters in the restoration plot, and reserving water delivery outlets of 1-2 meters in a staggered way on the ridge adjacent to the water delivery ditch (S13); and
planting reed rhizomes at a slope of the water delivery ditch (S14);
performing germplasm improvement treatment of Euryale ferox by obtaining mature Euryale ferox seeds, and sequentially performing disinfection, low-temperature sand storage and seed soaking priming treatment on the mature Euryale ferox seeds (S2);
controlling sowing of the Euryale ferox seeds by soaking the Euryale ferox seeds after the germplasm improvement treatment in a water body at 31-35° C. in a continuous illumination environment for 5-10 days; evenly sowing the Euryale ferox seeds that have undergone germplasm improvement treatment in the restoration plot, and keeping a seed coat break for downward cultivation; wherein a soil moisture content is kept at 90-100% at an initial stage of cultivation, and a depth of surface water accumulation is kept at 10-15 centimeters during a seedling development stage, and a depth of the surface water accumulation is kept at 70-80 centimeters during an adult plant development stage (S3); and
performing the germplasm improvement and ecological conservation by collecting a portion of each of the Euryale ferox seeds, wherein 5% of the Euryale ferox seeds developed in a current year are reserved for near-natural sexual breeding in the restoration plot, and 10% of collected Euryale ferox seeds are subjected to the germplasm improvement treatment; pumping out a water body in the restoration plot to a surface water depth of 10-20 centimeters, and mixing Euryale ferox stems with a soil with a depth of 30-40 centimeters (S4).