Rapeseed is one of the easiest crops to cultivate, farmers often in the farmland winter and spring fallow period in the field sprinkled, rapeseed, about two months after sowing will bloom a small yellow flowers, wait until the next spring farmers will be plowed into the soil in order to increase the nutrients of the soil. And the fruit after flowering, is China's first major edible vegetable oil raw materials. Next, I will give you a detailed introduction to the cultivation technology of rapeseed as well as precautions.

Cultivation techniques of rapeseed

1, variety selection

Selected early maturity resistance to late sowing, strong seed germination, good resistance to inversion, the main inflorescence is long, compact, disease resistance of double-low rapeseed varieties.

2, field preparation

The previous crop was harvested immediately after the sunny bottom fertilizer and open a good three ditches, moisture or rainy days immediately sowing. The bottom of the fertilizer is careful to use ammonia nitrogen, so as not to burn buds and seedlings.

3, seed treatment and sowing

The Yangtze River Basin suitable sowing period for September 20 to 30, no later than mid-October. Sowing every kilogram of seed with sifted dry soil manure and 15% polystyrene 1.5 grams (to prevent high-footed seedlings) fully mixed, in the field without stagnant water, not trapped feet can be sown, generally mu with 0.2 to 0.3 kg of seed. If the dry weather after sowing, you can furrow irrigation drought to promote seedling emergence, but strictly prohibit the border irrigation.

4, chemical weed

According to the distribution of weed communities during the last year to be good before sowing, after sowing before seedlings, seedlings and other three weed control.

5, fertilizer transport

To take the bottom of the fertilizer, see seedling fertilizer, early fertilization principle. Each acre can be applied 15 to 18 kg of pure nitrogen, phosphorus pentoxide 8 to 10 kg, potassium oxide 8 to 12 kg, borax 1 to 1.5 kg. Phosphorus and potassium fertilizer and boron fertilizer are used as a base fertilizer. 50% of nitrogen fertilizer for the base fertilizer, wax fertilizer or early spring relay fertilizer accounted for 20%, Carex fertilizer accounted for 30%, so that the buds on the application (Carex height 3 ~ 5 cm).

6, field management

direct seeding rape in 1 ~ 2 true leaves can be planted between seedlings, to small stay big, to miscellaneous stay pure; Wang long field should be in November in the middle and late mu with 30 ~ 50 grams of doxorubicin for chemical control; such as seedling leaf color yellow, the birth of new leaves is slow, to be combined with the moisture of the mu of urea 3 ~ 6 kg to raise seedlings; do a good job of drought prevention and control of stains and diseases and pests.

7, timely harvest

The appropriate harvest is about 30 days after the final flowering of rapeseed. It is appropriate to harvest when 2/3 of the fruits of the field are yellowish-green, the fruits of the spindle are loquat-colored, and 1/3 of the fruits of the whole plant are still green. The harvesting time should be delayed by 3-5 days for the fields with mechanical harvesting. Rapeseed is suitable for a shorter harvest period, to grasp the timing, seize the sunny days to harvest.

Precautions

One is to determine the appropriate amount of seeding according to soil fertility, moisture conditions. If the soil condition is poor then the amount of seeding should be increased.

The second is to ensure appropriate planting density, generally 25,000 to 30,000 plants / mu is appropriate.

Third, timely seedling checking, sparse to make up for the shortfall, it is better to be early than late.

The fourth is to ensure that the three ditches are smooth, and to do a good job of prevention and treatment of botrytis during the flowering period.