When is the best time for direct seeding rape?

The growth and development of direct-seeded rape did not stop temporarily because it did not go through the process of picking seedlings and transplanting. Under the same conditions, direct seeding of the same variety can be delayed by 10 ~ 15 days compared with transplanting. The agricultural proverb "cold dew rape first frost wheat" is the experience of sowing rape in Hubei Province. However, with the delay of sowing date, the whole growth period, especially the vegetative growth period, is shortened accordingly, and the productivity per plant is reduced, resulting in reduced production. Therefore, direct seeding rape should be sown in time, the planting density should be increased appropriately, and the number of population plants should be increased to make up for individual deficiency. In general, the total number of direct seeding rape plants is 30% higher than that of transplanted rape under the same conditions. The upper and middle reaches of the Yangtze River will be broadcast live in September 15 ~ 20. "Lower Yangtze River" will be broadcast live around September 25th. In addition, to determine the specific sowing date, we should also consider the characteristics of varieties and soil moisture. Varieties with strong winter can be sown early, and varieties with strong spring can be sown late. Sow in time when wet.