1. Early sapling of spring sesame seed selection: After mulching, the effective growth period of sesame is prolonged. Therefore, the middle and late ripening sesame varieties with high tolerance to pods, diseases, and high yield should be selected, such as Yuzhi No.5, No.7, No.8 and sesame hybrids, suitable for early sowing. The sowing date is from the end of April to the beginning of May. Use the growing season to increase sesame yield. 2, soil preparation fertilization ridging: increase phosphorus and potassium fertilizers, control the amount of nitrogen fertilizer. When more than 200 kilograms of sesame is produced, about 20 kg of nitrogen, phosphorus and potassium are applied. In the fertilization method, the basic fertilizer is the main fertilizer, supplementing flowering topdressing and foliar dressing. Half of the total P and K fertilizers and total nitrogen were used as the base fertilizer, and the remaining half of the N fertilizer was used as top dressing. Film sesame The ridges must be carried out, generally every 80 centimeters from a ridge, the ridge width is 45 centimeters wide, the width is 35 centimeters, and the ridge height is about 10 centimeters. 2 rows per ridge, with an average spacing of 40 cm. 3, sowing and film: film sesame seeds can be drilled, generally can be sown before the cover film, film width to 70 cm is appropriate, in order to reduce production costs, the general use of linear low density polyethylene thin film (the local film thickness is At 0.008 mm, about 6.5 kg of plastic film is required per mu.) Membrane can be used mechanically or artificially, but must be flat ridges, mulch and soil surface, plastic film seal, all holes are covered with soil tight. In addition, the pre-emergent soil-treating herbicide was sprayed before sowing to prevent weeds. 4. Chemical control: Use 100mg/kg-150mg/dry gram to soak seed with (ppm) shrinkage or spray 150mg/kg (ppm) shrinkage before seeding to promote root seedlings. Porcelain Mortar & Pestle,Mortar Pestles,Medical Mortar Pestle,Porcelain Mortars Spout Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com