What kind of fertilizer is good to chase in the later stage of rape? What should I pay attention to?

In the later stage of rapeseed, potassium dihydrogen phosphate and urea can be sprayed at the flowering and pod-setting stage, and can be sprayed in combination with the prevention and control of sclerotinia and aphids. Attention should be paid to prevent the increase of grain weight and premature senescence of plants.

If the rape grows well in the later stage, then you don't need to apply flower fertilizer at all.

Rapeseed seedlings grow to the later stage, the growth of rapeseed seedlings is weak, and the climatic conditions are suitable, so they should be topdressed again with post-seedling fertilizer, 10 kg of 45% compound fertilizer + 5 kg of diammonium phosphate per mu. Foliar sprays of potassium monobasic phosphate + brassinolide were carried out at the same time.

In winter, rape should be topdressed

Winter rape topdressing tips

1) Skillfully apply seedling fertilizer.

After the seedlings are transplanted and returned to green, the earlier the better, generally 3 to 5 kg of urea, 5 kg of potassium chloride, 300 to 500 grams of boron fertilizer, 750 to 1000 kg of thin fertilizer water, 1 to 2 times need to be applied. Or apply 45 to 50 kg of ammonium carbonate per mu, and return to green as soon as possible after application, so as to make full use of the high temperature after the weather is sunny and promote rapeseed to root and grow leaves as soon as possible.

2) Reapply basal fertilizer.

The base fertilizer is mainly organic fertilizer, for the plot of medium fertilizer, 1000 to 1500 kg of rotted farm fertilizer, 10 to 12 kg of superphosphate, 5 to kg of ammonium carbonate are applied per mu, and the three fertilizers are mixed together when applied. Then applied into the rows, combined with cultivating and weeding, so as to keep warm, promote roots, protect roots and increase fertilizer.

3) Cultivating and fertilizing.

When planting rape into winter, we must first do a good job of cultivating it. Because the temperature in winter is very low, cultivating can not only increase the soil temperature, but also loosen the soil, and can also play a direct role in protecting the roots, which is very beneficial to the root growth of rapeseed. Then, an appropriate amount of organic fertilizer should be applied between the rows of rapeseed, which can not only provide sufficient nutrients for rapeseed, but also increase soil temperature.

Thermal insulationIn the winter, rape can flower and sprout normally, and it can also increase the potassium content of rape and reduce freezing.

4) Foliar sprays.

Foliar spraying of phosphorus fertilizer can enhance the cold resistance of rapeseed, the method of preparing phosphate fertilizer liquid is to crush with 2 kg of phosphate fertilizer per mu, and then put it into a container and add an appropriate amount of water to soak, remove it after a week, add 200 grams of urea per mu, and spray the leaves until dripping. If the container is small, a small amount of water can be added when the fertilizer solution is insufficient, reduce the evaporation of the solution, maximize the absorption and utilization of the leaves, and spray foliar fertilizer should be sprayed in the afternoon on a sunny day in windless weather.

5) Spring fat and strong seedlings.

Do a good job of late planting rape spring fertilizer and strong seedlings, which is an important measure to solve the problem of late planting rape to seize high yield, generally apply 8 to 10 kg of urea per mu after spring, and then apply 5 to 7 kg at the sprouting stage. Relying on spring fertilizer to achieve the purpose of high yield, strictly prevent downy mildew after spring of late-onset rapeseed, and can be controlled by pesticides such as disease and grass in the budding stage.

1. Apply seedling fertilizer early. Early application and frequent application of seedling fertilizer, timely application of nutrients required for rapeseed seedling stage, and the use of short high temperature before winter to promote the growth of rapeseed, achieve strong seedlings and overwinter, and lay the foundation for high and stable yield of rapeseed. Seedling fertilizer and cocoa are divided into two top dressing in the early and late seedling stages.

2. Steady application of sprout fertilizer. The rapeseed stage is the period of vegetative growth and reproductive growth at the same time, the plant rapidly pulls the sprouts, grows branches, the leaf area increases, and the flower buds are greatly differentiated, which is the period when the most fertilizer is needed, and it is also the key period for increasing branches and pods. Therefore, according to the application of base fertilizer and seedling fertilizer and growth, it is necessary to apply sprout fertilizer stably as appropriate.

3. Skillfully apply flower fertilizer. The number and weight of seeds are closely related to the nutritional conditions after flowering. For vigorous growth, the amount of fertilizer at the sprout stage can be avoided or less; No application for early-maturing varieties, or less application at the first flowering stage; Top dressing during flowering can be applied as a foliar spray, with urea or potassium dihydrogen phosphate sprayed at the flowering and pod-setting stage.

The key point of rapeseed topdressing is that we must apply enough basal fertilizer, and we must top dressing early.

Rapeseed seedling stage nitrogen demand, growth period need phosphorus, potassium fertilizer before the application of boron on rapeseed flowering, pollination, fruiting, supplementation of calcium, magnesium and zinc has an excellent effect on the growth and development of rapeseed.

1. Nitrogen: the absorption of nitrogen at the seedling stage accounts for 45% of the total absorption, the critical period of nitrogen nutrition at the seedling stage, the vegetative growth and reproductive growth at the budding stage are very vigorous, and it is the period when rape needs more nitrogen.

2. Phosphorus: rapeseed grows in the early stage of the response to phosphorus Changli, phosphate fertilizer is applied as basal fertilizer, flowering period to maturity stage, is the period when rape absorbs phosphorus, accounting for 50% of the whole growth period, after maturity, 60-70% of phosphorus is distributed in the grains.

Third, the demand for potassium fertilizer in rape panicle draft is very large, the potassium concentration in the plant is high at the stage of sprouting, and potassium fertilizer must be applied before sprouting, and the earlier the application, the earlier the healing.

In general, it is best to plant in late March in the spring. Oilseed rape can be fertilized 3 to 4 days after the live tree. When fertilizing, you need to pay attention to the concentration and the time of fertilization.

That is, when the first flower is bloomed, you can use water and fertilizer, so that the absorption is fast, and soon they can drink and grow.

In the process of rapeseed planting, when rapeseed begins to emerge, it is the peak period of fertilizer demand, and at this time, it is necessary to apply fertilizer reasonably according to the planting density.

Traditional rape winter has autumn rains, which are before winter. That is to say, after heavy snowfall, before the winter solstice, the pork and beef rib fertilizer or fertilizer is often scattered between the **, and then mills the mud to become a warm fortress. Because they are all complete fertilizers.

It's different now. Planting no-tillage rice pan rape, there is no pig and beef rib fertilizer, and people use 50 kg of sugar-free ternary compound fertilizer at the same time.

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Reasonable irrigation is an important measure to ensure high yield and stable production of rapeseed. Rapeseed has a long growth time, large vegetative body, lush leaves, many fruiting organs, and large lifelong demand, and the rapeseed production area generally has less rainfall in autumn, winter and spring, and less soil drought, which is not conducive to sowing and seedlings. Northern Regions.

Winter drought aggravates the East China Sea, resulting in dead seedlings. In the southern region, there is a lot of rain in the later period, resulting in staining or flooding losses. Therefore, it is necessary to irrigate in time according to the local conditions according to the characteristics of the water demand of rapeseed.

Raise seedlings frequently, provide the nutrients required for rapeseed seedling stage in time, use the short high temperature in winter to promote the growth of rapeseed, realize strong seedlings overwintering, and lay the foundation for high yield of rapeseed. Seedling fertilizer can be topdressed twice in the early stage of seedlings and in the late stage of seedlings. Early fertilizer for seedlings is at the time of seedling setting or on 5 true leaves.

application, usually applied 5 to 6 kg Wudang.

Urea. In soils with insufficient phosphorus and potassium, if the basic fertilizer is not suitable for phosphorus and potassium, phosphorus and potassium fertilizer should be supplemented. Top dressing in the later stage of the seedling depends on the seedling mood and climate.

Autumn of rape is the parallel period of vegetative growth and reproductive growth, and the plant is the period of autumn large, long branches, large leaf area, and flower eye differentiation, which is the period of most fattening and an important period of increasing branches. Therefore, it is necessary to appropriately stabilize the autumn rain according to the application and growth trend of base fertilizer and tombstones. The base tombstone is well fertilized, and the plants grow and are fruitful, with no or no fertilization.

If the wonderful fertilizer is insufficient, those who have a tendency to defertilize should apply fertilizer as soon as possible. Generally, 15-20 kg per mu of high-nitrogen compound fertilizer is applicable. The fertilizer time is generally in the middle of autumn, and the height of autumn is 15 30 cm.

However, people with a weaker initial condition can apply fertilizer at the beginning of autumn to avoid premature aging.

Rape after the autumn generation.

The number and weight of seeds are closely related to the nutritional conditions after flowering. Due to the strong growth momentum, people who are not in large quantities during the autumn season can not give or apply less. Not suitable for early-maturing varieties, or less for flowering periods.

Autumn rain can be sprayed on the leaf surface during flowering, and ether or potassium dihydrogen phosphate can be sprayed during flowering pods.

Of course, rape should be topdressed in winter, because rape is a rapid growth process in winter, and if nutrients are not replenished in time, it will directly affect the flowering and fruiting of the following spring. Generally, it is better to top dressing in the morning in winter, when it is conducive to rape absorption.

In our lives, do winter canola need to be topdressed?When exactly is the top dressing?Generally, after a long winter, overwintering rape accelerates its growth in spring and enters the flowering and poding stage, and the rape belongs to the infinite inflorescence, and the flowering and poding time is relatively long, and it can mature while flowering and poding.

After careful management in the early stage, rape enters the flowering and podding stage, generally in the early flowering stage of rapeseed, the growth is vigorous, and the growth is relatively good, so as to prevent rapeseed from being greedy for green and late maturing due to excessive nitrogen. If the growth potential of rape is relatively weak, potassium dihydrogen phosphate + urea + Tianda 2116 can be used to spray the whole plant, and about 70 80 kg of aqueous solution is needed per mu. In fact, how to fertilize rape depends on the situation of the plot and the growth of the plant, and finally achieves the effect of balanced fertilization.

After the full application of organic fertilizer, vegetable farmers can add nitrogen, phosphorus and potassium fertilizers according to the fertility of the soil and the yield standard, in principle, it is necessary to control the amount of nitrogen fertilizer and increase the application of phosphorus fertilizer and potassium fertilizer. Nitrogen, phosphorus and potassium fertilizers are the fertilizers that must be applied to each crop.

Fertilizer should be done around September, while winter rape is planted in early September and harvested in April-May of the following year.