Rapeseed is one of the most competitive crops in both domestic and international markets, playing a key role in the city's bulk agricultural production. Not only is it an excellent raw material for edible oil, but it also serves as a promising energy crop that can be used to produce biodiesel. Its strong adaptability, high yield potential, and rich genetic resources make it a valuable option for farmers and agribusinesses alike. Developing rapeseed production can significantly boost farmers' income and improve enterprise efficiency.
One of the important practices in rapeseed cultivation is live broadcasting, which includes no-tillage direct seeding, ploughing-based direct seeding, and intercropping with cotton or forest trees. These methods help save labor and reduce the need for animal power. On average, about three laborers per mu can be saved, and two more can be spared, making this technique ideal for sustainable development. It supports labor transfer projects and helps farmers meet critical sowing periods, thus increasing yields while reducing production costs.
To ensure successful rapeseed broadcasting, the following key techniques should be mastered:
1. **Seeding Time**: The optimal period for direct seeding is from September 20th to October 10th, with the best time being late September to early October.
2. **Variety Selection**: High-quality, cost-effective varieties such as Zhongshuang No.9, Zhongshuang No.8, Zhongshuang No.10, and Zhongshuang No.4 are recommended for live broadcasting. Hybrid seeds should be selected in late September.
3. **Seed Rate**: The recommended seed rate for direct seeding is 500–600 grams per acre. In cases of severe drought, the amount can be increased slightly.
4. **Sowing Method**: Live seeding can be done before or after rain, and straw mulching can be applied to provide insulation. Mechanical sprayers can also be used for efficient sowing.
5. **Fertilizer Application**: For no-tillage rapeseed, top-dressing with fertilizer is effective. For ploughed direct-seeded rapeseed, 20 kg of spike-rich compound fertilizer and 600 g of high-quality borax are recommended for top dressing.
6. **Seedling Management**: After emergence, thin out sparse seedlings and remove overcrowded ones. At 2–3 leaves, avoid thinning; at 4–5 leaves, keep about 20 plants per square meter. Select healthy, strong seedlings, and manage spacing according to field conditions—keep some thick, some thin, and avoid overwatering or over-delaying planting.
7. **Pest Control**: Common pests include aphids and cabbage caterpillars. Timely chemical control is essential to protect young plants and promote healthy growth. (Hubei Dangyang Agricultural 110 Service Center)
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