Planting Xiaobai must know that if you want rapeseed to have a high yield, how do you need to fertil

Fertilize them often, and they will be able to grow well by getting enough nutrients.

If you want to have a high yield of rapeseed, you need to ensure that it has reasonable nutrients, secondly, let the vegetables be less harmed, and finally choose high-yield seeds for sowing. In this way, high rape yields can be guaranteed.

Fertilize it when it first emerges, and water and fertilize it when it grows up, which will make your canola more productive.

Hello. Cultivation techniques of rape flowers.

1. Variety selection.

Double-low rapeseed varieties with early maturity and late sowing tolerance, strong seed germination potential, good lodging resistance, long main inflorescence, compact plant type and strong disease resistance should be selected.

2. Daejeon preparation.

Immediately after the harvest of the previous stubble, the bottom fertilizer was applied and the "three furrows" were opened, and the seeds were sown immediately if there was moisture or rainy days. Ammonia nitrogen should be used carefully for bottom fertilizer to avoid burning buds and seedlings.

3. Seed treatment and sowing.

The suitable sowing date in the Yangtze River basin is September 20 and 30, and no later than mid-October. When sowing, each kilogram of seeds is fully mixed with sieved dry soil manure and 15 paclobutrazol (to prevent tall seedlings), and can be sown when there is no stagnant water in the field and no foot sink, and the kilogram of seeds per mu is generally used. If there is dry weather after sowing, ditch irrigation can be used to resist drought and promote the emergence of seedlings, but it is strictly forbidden to flood the furrow surface.

4. Chemical weeding.

According to the distribution of weed communities in the previous year, the weeding was done before sowing, before sowing, before seedlings, and at seedling stage.

5. Fertilizer management.

Adopt the principle of applying plantar fertilizer, looking at seedlings, applying seedling fertilizer, and applying sprout fertilizer early. 15 18 kg of pure nitrogen, 8 10 kg of phosphorus pentoxide, 8 12 kg of potassium oxide and 1 kg of borax can be applied per mu. Phosphorus, potassium and boron fertilizers are used as base fertilizers.

50 nitrogen fertilizer as base fertilizer, wax fertilizer or early spring relay fertilizer accounted for 20, sprout fertilizer accounted for 30, so that the buds were applied (sprout height 3 5 cm). During the flowering period, it is recommended to use boron fertilizer to increase pollen germination.

6. Daejeon management.

When the direct seeding rape is 1 or 2 true leaves, the seedlings can be planted, and the small ones can be left to the large, and the miscellaneous ones can be left pure. Wangchang field should be chemically controlled with 30 50 grams of paclobutrazol per mu in mid to late November; If the leaf color turns yellow at the seedling stage and the new leaves are born slowly, it is necessary to apply 3 6 kg of urea per mu in combination with moisture to raise seedlings; Do a good job in drought resistance, stain prevention and pest control.

7. Harvest at the right time.

The best harvest is about 30 days after the final flowering of oilseed rape. It is advisable to harvest when there are 2 3 shorn fruits in the whole field that are yellow-green, the middle shorn fruit of the main axis is loquat color, and there are still 1 3 shorn fruits in the whole plant that are green. Harvesting of mechanically harvested plots should be delayed by 3 to 5 days.

The suitable harvest period of rape is short, so it is necessary to grasp the timing and seize the sunny day to harvest.

Rape flowers. Precautions.

The first is to determine the appropriate sowing amount according to soil fertility and water conditions. If the soil condition is poor, the sowing should be increased.

The second is to ensure the appropriate planting density.

The third is to check the seedlings in time, sparse and fill the gaps, sooner rather than later.

Fourth, ensure the smooth flow of the "three ditches" and do a good job in the prevention and control of sclerotinia sclerotinia at the flowering stage.

The rape cultivation method is as follows:

1. Select the variety. The selection of suitable varieties is the key to high yield of rapeseed, which requires varieties to have the characteristics of high yield, high quality "double low", high oil content, high resistance, lodging resistance, antibacterial sclerotinia resistance and so on.

2. Choose a good seedbed. Choose dry soil or vegetable garden soil with loose and fertile soil, convenient drainage and irrigation, flat terrain, and no rapeseed planting for more than 2 years as seedbed. Seedbed area: The field area should be about 1:5.

3. Apply plantar fertilizer. Before sowing, the seedbed should be finely arranged, and the seedbed should be mixed and piled for 10 days according to the tons of rotted pig manure, 20 kg of ammonium carbonate, 25 kg of calcium, magnesium and phosphate fertilizer, and 6 kg of potassium chloride.

4. Sow seeds at the right time. The sowing time is in early to mid-September, and each mu is mixed and evenly sown according to 1 kg of borax + fire soil ash + rape seeds. Before sowing, the furrow surface should be kept at a certain humidity, and it should be irrigated in time in case of dry weather, otherwise it will greatly affect the seedling emergence rate.

After sowing, cover with fire soil ash, and spray acetochlor on the surface of the chamber while it is wet to control weeds.

5. Timely seedlings. After the emergence of seedlings in the 1 leaf period seedlings 1 time, 3 leaves before the seedling, to remove small seedlings, weak seedlings, diseased seedlings, miscellaneous seedlings, to dense and thin, seedlings according to 70 to 100 plants is appropriate. After the seedlings are fixed, the seedbed is sprayed according to 30g paclobutrazol mixed with 50 kg of water per mu, which can cultivate dwarf and strong seedlings.

Pest control: At the seedling stage, it mainly controls pests such as cabbage insects, aphids, ape leaf insects, and ground tigers.

The fertilizer is made of organic fertilizer, and the weight ratio to the soil is 1:9, and it is watered once every twelve or three days, and it can be watered thoroughly.

<> "Brassica napus fertilizer requirement is higher than that of cabbage rapeseed, generally cabbage rapeseed needs to absorb nitrogen 4 5-5 5 kg per 50 kg of rapeseed, phosphorus pentoxide 1 5 1 95 kg, potassium oxide 4 05-6 4 kg, the ratio of nitrogen, phosphorus and potassium is about 1:0 3-0 4:0 9-1 1.

For every 50 kg of rapeseed produced, 2 9 kg of nitrogen, 1 2 kg of phosphorus pentoxide, 2 15 kg of potassium oxide, and the ratio of nitrogen, phosphorus and potassium is about 1:0 4:0 8.

From the seedling stage to the sprouting stage, the absorption of nitrogen accounted for about 45 of the total uptake, and the absorption of phosphorus and potassium accounted for about 20 of the total uptake from the seedling stage to the sprouting stage. The vegetative growth and reproductive growth are very vigorous at the stage of sprouts, which is the time when rape needs the most fertilizer, and the absorption of nitrogen and potassium in the sedan car reaches about 90 and 80.

From flowering to maturity, the absorption of nitrogen and potassium decreased, but the absorption of phosphorus accounted for more than 50 of the whole growth period.

Rapeseed fertilization implements nitrogen, phosphorus formula or nitrogen, phosphorus, potassium formula, and the formula ratio is 1:0 5 or 1:0 5:

0．7。Boron-deficient soil should be supplemented with boron fertilizer, the principle of fertilization is to apply plantar fertilizer, early seedling fertilizer, stable application of sprout fertilizer, skillful application of flower fertilizer. Take the bottom fertilizer to account for 70 of the total amount of fertilizer, and top dressing accounts for about 30.