High-yield planting methods and matters needing attention of rapeseed

Rape is the main oil crop in China, and the edible oil of farmers has been mainly rapeseed oil since ancient times. It can be said that it is an oil crop and an economic crop, because the price of pure natural rapeseed oil in the market is expensive and has a good planting prospect, so how can high yield be obtained? The following will introduce the high-yield planting methods and matters needing attention of rapeseed.

I. High-yielding planting methods of rapeseed

1. Variety selection

The varieties with short growth period, large grain, fast emergence and double occurrence in winter and spring should be selected.

two。 Suitable time for early sowing

The suitable sowing time is from September 25 to October 25. The earlier the sowing, the easier to get high yield. When the stubble allows, it is necessary to sow as early as possible to cultivate strong seedlings.

3. Field arrangement

The stubble height of rice harvest should be low, preferably about 10 cm, remove straw after cutting, and then apply base fertilizer to level the field to prevent water accumulation and rot in Wutang.

4. Fine sowing

Generally, the sowing rate is 300-400 grams per mu, and the suitable planting density of direct seeding rape per mu is generally 20-30,000 plants per mu. According to the early and late sowing and field soil fertility adjustment, early sowing and high fertility fields can appropriately reduce the sowing rate. The row spacing of sowing 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 missed sowing or rebroadcast.

II. Points for attention

1. Prevention and control of grass damage

Mechanical direct seeding rape has a large amount of weeds and serious weed damage, so it is necessary to select the right medicine according to the occurrence of weeds in the field. Fields dominated by Gramineae weeds can use 60-70 ml of 5% high-efficiency quinazolin EC or 10.8% high-efficiency fluoromethyl 30 ml per mu during the 3-4 leaf stage of weeds, while fields dominated by broad-leaf weeds can use 50 ml of 30% chlorpromazine suspending agent after the 4-leaf stage of rape. The fields with more weeds should be removed for the second time after the beginning of spring.

two。 Chemical regulation

15% paclobutrazol wettable powder is commonly used to spray 30-40 grams per mu of water, usually 7-14 days before the Winter Solstice.

3. adequate manuring

Pay attention to balanced fertilization and combined application of nitrogen, phosphorus, potassium and boron. Heavy application of basal seedling fertilizer, generally 30-40 kg per mu of compound fertilizer, 5-7.5 kg urea per mu during 3-4 leaf stage of rape, and wax fertilizer from late December to January. Combined with the prevention and control of Sclerotinia sclerotiorum at flowering stage, boron, potassium and molybdenum fertilizers were sprayed outside the roots of boron, potassium and molybdenum to prevent disease and premature senility.

4. Control of diseases and insect pests

The seedling density of direct seeding rape is high, so we should pay close attention to the prevention and control of diseases and insect pests in rape seedling stage. Rape mainly controls aphids, yellow striped beetles and cabbage insects at seedling stage, and Sclerotinia sclerotiorum at flowering stage.

With the development of science and technology, farmers' farming is becoming more and more convenient, and the output is getting higher and higher, because now they are all operated by machinery, which can save both cost and manpower. But at the same time, there are disadvantages, so it is necessary to strengthen field management when planting in order to obtain high yield.