Disaster prevention and reduction help sowing winter wheat

(1) drought prevention

Before overwintering, the wheat fields lacking moisture, straw returning, rotary tillage and unsolid soil should be watered at the right time to ensure that the seedlings survive the winter safely. Advocate water-saving irrigation, prohibit flood irrigation, hoe in time after irrigation, loosen the soil to preserve soil moisture, prevent surface cracking, and prevent ventilation from damaging roots and seedlings.

(2) preventing frost damage

The main types of wheat freezing injury in China are winter freezing injury, early spring freezing injury (late spring cold) and low temperature chilling injury. To prevent frost injury, we can choose varieties suitable for winter and spring, sow appropriate amount of seeds in appropriate time, improve sowing quality, and cultivate strong seedlings. The strain techniques to remedy the freezing injury of wheat include topdressing nitrogen fertilizer and watering in time after freezing.

(3) Prevention of diseases and insect pests

Seed coating can effectively control a variety of seedling diseases and insect pests. Imidacloprid, clopronitrile, difenoconazole suspension seed coating agent was selected to control root rot, sheath blight, aphids and underground pests at seedling stage. For wheat stripe rust, select resistant varieties to achieve rational distribution of resistance sources and regular rotation of varieties; for wheat scab, the mixture of cyanostat and tebuconazole (28 g / mu), carbendazim (50 g / mu) or thiophanate-methyl (70 g / mu) should be sprayed with 25 kg water at the early flowering stage. Li Dan