Late planting rapeseed

Most of the late-planting and weeding rapeseeds are transplanted in the rain gap. Due to the serious soil compaction, the soil should be cultivated in time, the soil will be loosened and simmered, and the root growth will be promoted. The transplanted rapeseed will eliminate the weeds in the field by cultivating and excavate the topsoil. The clods are broken. When the rapeseed is revived, the cultivating should be deep, the soil should be loose and sloppy, and the three ditches should be cleaned together with the cultivating, so that the ditch, the furrow, the lumbar ditch, and the ditch are connected. The drainage is smooth, and there is no water in the field to increase the ground temperature.

Qiao Shimeng Shiti Miao fertilizer should be applied to the seedling fertilizer in time after transplanting. The sooner the better, generally 3-5 kg ​​of urea per mu, 5 kg of potassium chloride, 300-500 g of boron fertilizer, 750-1000 kg of thin manure and manure, 1-2 times, or carbon per acre Ammonium 45-50 kg. Make full use of the higher temperatures after the weather is fine, and promote the long-leaved roots of rapeseed.

Re-application of wax fertilizer is mainly based on organic fertilizer, medium-fertile field, 1000-1500 kg per mu of pigs, 10-12 kg of superphosphate, 5-7.5 kg of ammonium bicarbonate, and three fertilizers are mixed together. It is applied to the rapeseed line, combined with the cultivating and cultivating, to play the role of keeping warm, promoting roots, protecting the roots and increasing fat.

Foliar application of phosphate fertilizer on the surface of the phosphorus fertilizer can enhance its cold resistance. The specific method of preparing the phosphate fertilizer is to take 2 kg of fine phosphate fertilizer per acre, put it in a container and add appropriate amount of water to soak it, take it out after one week. Add 200 grams of urea spray to the blade to start dripping. If the phosphate fertilizer solution prepared in a small container is not enough, a small amount of clean water can be added. In order to reduce the evaporation amount of the solution, the maximum absorption amount of the blade can be supplied. It should be sprayed on a sunny afternoon without a strong wind, and the interval is one to two weeks. According to practical observations, on the third day after the spraying, some of the leaves that were frozen to yellow turned green again, and the growth rate accelerated rapidly. After spraying a second time interval, the leaves were increased from the original four or five pieces. Eighty-nine pieces, and the leaves are green, the leaves are strong, and the leaves are thick and straight.

Controlling early rape and late rapeseed is weak due to nutrient growth before winter, and it is easy to produce early and early flowering, which can be controlled according to the situation. The first is to carry out deep cultivating on the fields with better growth and more fertility. Secondly, the method of re-application of nitrogen fertilizer can be adopted for the rape field with poor growth, which can effectively delay the growth of vegetative growth, increase the growth amount, and prevent the early flowering phenomenon.

Spring fat and strong seedlings do a good job of planting spring rape and strong seedlings in late rapeseed, which is an important measure to solve the high yield of late planting rapeseed. Generally, after the beginning of spring, 8-10 kg of urea per acre is applied, and 5-7 kg is chased after the twitching period, striving to build a high-yield seedling rack. Rely on the spring fertilizer to strengthen the seedling frame to achieve high yield. Severely prevent the occurrence of downy mildew after late spring rapeseed. In the flowering period, pesticides such as virulence and chlorhexidine can be used for prevention and control.

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