Flowering: In China, the viewing time of rape flowers is from the end of February to April every year. South Taiwan Province Province1February can blossom. Because the planting time is slightly different in different places, the flowering period will be slightly different, and it will be slightly different with the climate change. If it is warm winter, the flowering period will be earlier.

1. Variety selection: winter and spring varieties with short growth period, large seeds and quick emergence should be selected.

2. Suitable early sowing: 65438+1October 25th, September 25th to June 25th is the suitable sowing date. The earlier you sow, the easier it is to get high yield. Sow as early as possible and cultivate strong seedlings when stubble is allowed.

3. Field layout: When harvesting rice, the stubble height should be low, preferably around 10 cm. After cutting, remove the straw, and then apply base fertilizer to level the field to prevent waterlogging and rotten seeds.

4. Precision sowing: The general sowing amount is 300-400g per mu, and the suitable planting density of direct seeding rape is 20,000-30,000 plants per mu. According to the adjustment of early sowing, late sowing and soil fertility in the field, the sowing amount can be appropriately reduced in the field with high fertility, and Ribelli bird's nest water-soluble fertilizer can be used, with high utilization rate and easy absorption. The sowing row spacing is generally 40 cm, and the sowing depth is 1.0-2.0 cm. Sowing should be uniform and consistent, and there should be no omission or replay.