Most of the late cultivating and weeding plants were transplanted in the rain gap. Because of severe soil compaction, the cultivator should be cultivated in time to loosen the soil, eliminate the earth, promote root growth, transplant rapeseed to eliminate field weeds, and dig the topsoil. The soil clods break. When the oilseeds turn green, they should deep in the cultivator, loosen and loosen the soil, and combine the cultivator to do a good job of cleaning the three trenches so that the trenches, gutters, gutters and gutters can communicate with each other. Drainage is smooth and the field is not stained with water to increase the temperature.
The Qiao Shimiao seedling fertilizer should be timely applied to raise seedlings after transplanting. As soon as possible, the better, generally with 3-5 tons of urea per mu, 5 kg of potassium chloride, 300 ~ 500 grams of boron fertilizer, 750 ~ 1000 kg of thin man and animal waste water, topdressing 1 ~ 2 times, or carbon per acre Ammonium 45 ~ 50 kg, apply to promote the return of green as soon as possible, make full use of the higher temperature after the weather is fine, and promote the long hair more than long leaves.
Re-apply wax-fertilizer to organic fertilizer-based, medium-fertilizer plots, apply 1,000-1,500 kg of cattle per acre bull bark, calcium superphosphate 10-12 kg, 5-7 kg of ammonium bicarbonate, the three kinds of fertilizer mixing Together, they can be used in rapeseed rows, combined with cultivating cultivation, to maintain warmth, promote roots, protect roots and increase fertilizer.
Foliar application of phosphate fertilizer foliar spray phosphorus fertilizer can enhance its cold resistance. The concrete method for preparing phosphate fertilizer solution is to take 2 kg of finely ground phosphate fertilizer per acre, put in a container and add appropriate amount of water to soak, and remove it after one week. Add 200 grams of urea spray to the leaves to start dripping. If the container is small and the formulated phosphate fertilizer liquid is not enough, a small amount of fresh water can be added. In order to reduce the evaporation amount of the solution, the maximum absorption amount of the leaf is supplied, and it should be selected in the sunny afternoon without wind.
Spray under conditions, one to two weeks apart. According to practical observation, on the third day after the liquid was sprayed, some of the leaves that had been frozen to yellow turned green again, and the growth rate accelerated rapidly. After the second spray at intervals, the leaves had increased from the original four to five. Eighty-nine pieces, and green leaves, strong leaves and stems, thick and straight leaves stretch.
The control of late-planting rapeseeds due to weak early-vegetable nutrition is prone to early onset and early flowering, which can be controlled according to the situation. The first is the use of deep-medium cultivators for well-grown and fertile fields. The second is that the poorly growing rapeseed fields can be replanted with nitrogen fertilizers, which can effectively delay the growth of vegetative growth, increase the amount of growth, and prevent the occurrence of early pods and early flowering.
Spring fat and strong seedlings are good for spring rape and strong seedlings for late planting rapeseed, which is an important measure to solve the problem of late planting of rapeseed and seizing high yield. Generally, after the beginning of spring, 8~10 kg of urea is applied per acre, and then 5~7 kg are recovered during the convulsions period, and efforts are made to erect a high yield seedling. Rely on re-applying spring fertilizers to raise the seedlings and achieve high yields. The occurrence of downy mildew in late spring rape can be strictly prevented. In the flowering stage, it is possible to use pesticides such as chlorfenone and chlorpyrifos for prevention and treatment.
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