How should rape flowers be sown and raised?

Rapeseed is one of the main oil crops in China, and the content of rapeseed oil is high, which can reach 35%-50%. In recent years, with the increase of market demand, rapeseed oil is in short supply. In order to meet the market demand, improve the level of rape cultivation technology, expand the planting area, and achieve high and stable yield of rape is imminent. Here are some methods about sowing and raising seedlings.

First, seedling management

High-quality seedlings contain a lot of chlorophyll and have strong photosynthesis. The water content of plants is not high, but the sugar content is sufficient, which is beneficial to flower bud differentiation and fruit growth.

Second, seed selection.

Seed selection is a necessary condition for breeding high-quality seedlings and realizing high yield of rapeseed. There are many varieties of rape on the market at present. In the process of planting rape, scientific selection should be made according to the local climate and soil conditions. In the specific planting process, it is necessary to cultivate varieties with fast germination, strong stress resistance, dwarf resistance, lodging resistance, high yield and high quality.

The third is reasonable sowing.

Sowing time should be determined scientifically and reasonably according to local soil conditions, light conditions and temperature conditions. Late sowing time affects the formation of strong seedlings. This is because the growth of rapeseed needs 60℃ light. Premature sowing will lead to germination before winter, affect the cold resistance and hinder the smooth overwintering of rape. The best sowing temperature of rape is 22 ~ 25℃, that is, September ~ 10 is the best sowing time. When sowing, deep, loose, flat and sunny fields should be selected, and organic fertilizer and nitrogen, phosphorus and potassium fertilizer should be used reasonably to ensure the healthy growth of rapeseed. The sowing amount should be controlled at 2500-800g hm2. In the process of planting, fully decomposed ash and seeds are mixed evenly, and appropriate fertilizer is applied. It can greatly improve the germination rate of seeds.

Fourthly, seedling management.

After the emergence of rape seedlings, the seedlings should be pulled out from shrub seedlings regularly and sprayed with 100 mg/kg paclobutrazol to avoid seedling height. Intercropping can be carried out after two real leaves, and the spacing between plants should be controlled at 3 ~ 6 cm. When the seedlings grow to 5 leaves, the second thinning and wide cutting can be carried out (the row spacing is controlled at 20 cm, and the plant spacing is controlled at 10- 12 cm). At the same time, rational application of N, P and K fertilizers, setting sufficient water, topdressing for many times according to the growth of seedlings, and determining the planting amount in combination with the planting situation. Species and soil conditions. Generally controlled at1.5000 ~1.8000 plants /hm2. In addition, manual weeding can be carried out to reduce the damage of rape to the root system.

These are the problems that we should pay attention to when planting rape seedlings, and I hope it will help everyone.