Is there much rape planting in Nanxian County, Hunan Province? Who knows?

Quite a lot. There is a big one in Nanxian County.

Rape is mainly cultivated in winter, which does not compete with other oil crops for land, and has wide production adaptability. Rape can be sown in different climatic zones in spring and autumn, and can be planted in areas with one year or more. Especially in China's subtropical rice planting areas, double cropping or triple cropping of rice and rape a year can make full use of light, heat and soil resources.

Cultivate strong seedlings

1. Select varieties. Choosing a good variety is the key to high yield of rapeseed, which requires high yield, high quality ("double low", high oil content and so on. ) and high resistance (lodging resistance, Sclerotinia sclerotiorum resistance, etc.). ), such as Zhongshuang 1 1, Huaza 9, Changzayou 2 and 3.

2. Choose a good seedbed. Choose dry land or vegetable garden soil with loose and fertile soil, convenient irrigation and drainage, flat terrain and no rape planted for more than 2 years as seedbed. Seedbed area: The best ratio of field area is 1:5-6.

2. Apply sufficient base fertilizer. Before sowing, the seedbed should be carefully arranged, and the decomposed pig cow dung 1.25 tons, ammonium bicarbonate 20 kg, calcium magnesium phosphate 25 kg and potassium chloride 6 kg should be mixed and stacked for about 10 day. Combined with the arrangement of seedbed, Woye water-soluble fertilizer can be used for late topdressing, and the effect is better.

3. Sow in time. The sowing date of rapeseed is in the first half of September, and it is evenly sown according to the ratio of borax+fireclay +0.4-0.5 kg rapeseed per mu. Before sowing, the border surface should be kept at a certain humidity, and irrigation should be done in time in case of dry weather, otherwise the seedling emergence rate will be greatly affected. After sowing, cover with fireclay ash and spray acetochlor on the surface of the compartment when it is wet to prevent weeds from growing.

4. timely interplanting. After emergence, interplant at 1 leaf stage 1 time, set seedlings before 3 leaves, remove small seedlings, weak seedlings, diseased seedlings and miscellaneous seedlings, remove dense seedlings and make up sparse seedlings, and preferably set seedlings at 70~ 100 plants /m2. Spraying 30 grams of paclobutrazol and 50 kilograms of water per mu on the seedbed after seedling formation can cultivate stocky seedlings; Pest control: Rapeseed seedlings mainly control cabbage caterpillar, aphid, ape leaf worm, cutworm and other pests.