Work before broadcasting

1. Select varieties that are suitable for maturity and excellent resistance. In the main producing areas of the western Liaoning, Liaobei and Liaozhong provinces, the varieties with the growth period of 125-132 days are selected; the original planting varieties in the Liaodong area are basically middle-maturing varieties, and the original selected varieties are continued to be used; , try to choose very late varieties.

2. Pursue a sufficient amount of fertilizer according to the nutrient content of the fertilizer and the different fertility plots. Low-yield land: N fertilizer 10 ~ 12 kg / mu (equivalent to 22 ~ 26 kg of urea), P fertilizer 3 ~ 4 kg / mu (equivalent to 6.5 ~ 9 kg of diammonium phosphate), K fertilizer 3 ~ 3.5 kg / mu (equivalent Potassium chloride 5 ~ 6 kg); medium yield plot: N fertilizer 12 ~ 14 kg / mu (equivalent to urea 26 ~ 30 kg), P fertilizer 4 ~ 5 kg / mu (equivalent to 9 ~ 11 kg of diammonium phosphate), K fertilizer 3.5 ~ 4.5 kg / mu (equivalent to 6 ~ 7.5 kg of potassium chloride); high-yield land: N fertilizer 14 ~ 16 kg / mu (equivalent to urea 30 ~ 35 kg), P fertilizer 5 ~ 5.5 kg / mu (equivalent Diammonium phosphate 11 ~ 12 kg), K fertilizer 4.5 ~ 5.0 kg / mu (equivalent to 7.5 ~ 8.5 kg of potassium chloride).

Seeds must be coated before sowing. The seed coating agent to be used must contain underground pests (carbocarb, butyl thiocarbazone, imidacloprid, beta-cypermethrin, chlorpyrifos, cypermethrin, cypermethrin, methylisophosphorus, phoxim). And a mixture of two or more kinds of seedling diseases (Fumeishuang, Captan, Carbendazim, Froxime, Jingjialing, Triadimefon).

3. Deeply leveling the land and keeping the work. From the end of March to the beginning of April, in the land that has been removed from the roots, the soil is deeply loosened, combined with the deep application of the base fertilizer, the depth of fertilization reaches more than 10 cm.

Timely increase, rush to sow

Strive to do a good seedling to protect seedlings. When 5 to 10 cm of plough layer, the ground temperature is stable through 10 ° C, and the soil water content can be sown when appropriate.

Sowing should be done: the seeds should be selected uniformly, and the seeds should be sun-dried for 2 to 3 days before sowing. Seed coating should be carried out before sowing; the sowing should be uniform to prevent leakage, and the depth of the soil is generally 5~7 cm. Shallow, timely suppression after sowing, timely spraying chemical herbicides in 5 to 7 days after sowing to close the surface of the grass.

Fertilization management

1. Take both organic fertilizer and chemical fertilizer, and apply the base fertilizer before and after the fertilizer. Combine the autumn land preparation or the spring land to apply the base fertilizer.

2. Phosphorus and potassium fertilizers are applied before sowing. Nitrogen fertilizer is controlled by total amount, and 30% to 40% of nitrogen fertilizer is applied by base application before sowing.

3. Replenish the trace elements in the application. According to the soil nutrient and crop growth, determine the micro-nutrient fertilizer in the supplementary application, generally apply zinc fertilizer and boron fertilizer, with the application of base fertilizer or foliar application, the base fertilizer is generally applied 1.9 kg of zinc sulfate heptahydrate, borax 0.47 ~ 1 kg.