Cultivation technique of Spring Sesame with plastic Film mulching

Plastic film mulching cultivation can make the yield of sesame more than 150 kg per mu and some more than 200 kg per mu, so plastic film mulching is an effective cultivation measure to realize super high yield of sesame. The specific techniques are introduced as follows: 1. Seed selection and early sowing: after plastic film mulching, the effective growth period of sesame is prolonged. Therefore, excellent sesame varieties with high waterlogging resistance, disease resistance and high yield potential should be selected, such as Yuzhi No. 5, No. 7, No. 8 and sesame hybrids, which are suitable for early sowing and sowing from the end of April to early May, and make full use of the growing season to increase the yield of sesame. 2. Soil preparation, fertilization and ridging: increase the application of phosphorus and potassium fertilizer and control the amount of nitrogen fertilizer. When the yield of sesame is more than 200 kg per mu, nitrogen, phosphorus and potassium are applied about 20 kg each. In the method of fertilization, it is mainly based on base fertilizer, supplemented by topdressing at flowering stage and foliar topdressing. Half of the total phosphorus and potassium fertilizer and total nitrogen were used as base fertilizer, and the other half nitrogen fertilizer was used as topdressing. Plastic film sesame must implement ridge cultivation, generally every 80 cm from a ridge, ridge width of 45 cm, groove width of 35 cm, ridge height of about 10 cm. Each ridge is planted with 2 rows, with an average line spacing of 40 cm. 3, sowing and film mulching: plastic film sesame can be sowed by strip sowing, generally can be sowed first and then covered with film, and the width of plastic film should be 70 cm. In order to reduce the production cost, linear low density polyethylene thin plastic film is generally used (when the thickness of plastic film is 0.008 mm, about 6.5kg of plastic film per mu). Film mulching can be carried out mechanically or manually, but the ridge must be flat, the plastic film and the soil surface should be pasted, the plastic film should be sealed strictly, and the soil cover should be used where there are holes. In addition, pre-bud soil treatment herbicides were sprayed before film mulching after sowing to prevent weeds. 4. Chemical regulation: soaking seeds with 100mg / kg-150mg / g ppm before sowing or spraying 150mg / kg ppm at seedling stage to promote root squatting.