Huanghuaihai area is an area where wheat and beans are harvested twice a year. Because of the tight time after wheat harvest, high temperature, rapid ground evaporation, time-consuming and laborious ploughing and sowing, it is easy to lose water, which is not conducive to timely sowing and seedling emergence of soybeans. There are two common no-tillage sowing methods in production: iron stubble (stubble cleaning) sowing and stubble cleaning (stubble cleaning). No-tillage sowing should master the following points:

(1) seed selection. Select soybean varieties with high yield and high quality. Select seeds, do a good job in germination test, ensure the germination rate of seeds, and determine the appropriate sowing amount. Generally, the density per mu is about 6.5438+0.5 million plants, the weight of seeds with normal germination rate is about 20 grams, and the sowing amount per mu is controlled at 5 ~ 6 kilograms.

(2) timely early broadcast. Grab the seeds after the wheat harvest. Generally, the first half of June is the suitable sowing date, which should be sooner rather than later, and generally not more than June 20.

(3) Adopting suitable sowing methods. Using mechanical sowing, sowing with even precision, ditching, fertilizing, sowing and covering the soil at one time is beneficial to improving sowing quality and making seedlings neat and even. Generally, the row spacing is about 40 cm, or 40 ~ 50 cm wide and 20 ~ 25 cm narrow. The sowing depth is generally 3 ~ 5 cm, and the soil moisture is shallow and deep.

(4) fertilization. When sowing, apply special compound fertilizer for soybean, generally 20 ~ 25 kg per mu, or apply diammonium phosphate 15 kg and potassium chloride 10 kg per mu. Seeds and fertilizers should be layered, and fertilizers should be applied deeply, and they should not be mixed.

(5) Sow under sufficient moisture. When sowing, the soil water content is about 20%, which is called sufficient water. When sowing, if the soil moisture is insufficient, water should be used to make the soil moist, or wait for rain to grab the moisture during sowing.

(6) Weed control. Weeds are easy to grow in no-tillage covered fields. Chemical herbicides can be sprayed after sowing to seal the soil, or chemical herbicides can be used to kill weeds after soybean emergence.