1. Clean up the “three ditch†to prevent waterlogging. It will take a long time to dry for a long time. Last winter, the drought lasted for a long time. This spring rainy time may last for a long time. Therefore, all localities should be prepared for flood control. For rapeseed fields that are susceptible to waterlogging, the springs should be carefully cleaned up, and the trenches, gutters and trenches should be carefully cleaned to ensure the smoothing of the “three trenches†and the clearing of the ditch. Water energy filtration reduces field humidity and promotes root growth of rapeseed. 2, remove the frozen vegetables, see the seedlings and apply the fertilizer. For the frozen rapeseed, it is necessary to grab the clear and remove the moss. At the same time, look at the seedlings and apply the fertilizer: the bottom is fat, the winter is light, the spring is basically not frozen, and the strong and vigorous rape can be applied less or not. In the later stage of rapeseed, excessive application of nitrogen fertilizer was late. On the contrary, the application of the bottom fertilizer is less, the winter is affected by drought, the plant growth is weak, and the rapeseed which suffers from freezing and picking moss in spring, it is necessary to grasp the current favorable sensation and reapply the fertilizer, and generally apply 7-10 kg of urea to promote rapeseed. Restore growth as soon as possible, increase branching and increase production. 3, the surface of the spray of boron, to prevent "flowers and not real." Rapeseed is sensitive to boron deficiency, especially double-low quality rapeseed, which is more sensitive to boron deficiency. At present, the area of ​​high-quality rapeseed is large, and the drought in the soil is declining this winter. The effectiveness of boron in the soil is declining. The rapeseed plants are generally deficient in boron. Therefore, special attention should be paid to the application of boron fertilizer. At present, although there are more rains and rains, it is the best time for spraying rapeseed on the surface of rapeseed. Farmers must overcome the difficulties and pay attention to the application of boron fertilizer in the rainy weather. Generally, 0.1% of the selebrex boron or 0.5% of the borax aqueous solution is used. 60 kg, evenly spray 2-3 times to prevent rapeseed from "flowers and not real". 4, effectively grasp the prevention and control of pests and diseases. During the flowering period, there are more years of rain and rain, especially the prevention and control of sclerotinia sclerotiorum. Generally combined with the flowering period of boron, the use of 50% of the keeling (or sclerotium net) wettable powder 80--100 grams, or 25% of the fresh gram milk 30--40 grams, or 2% of the bacteria gram 120-180 ml of water, sprayed evenly with 60 kg of water. At the initial flowering stage, apply once every 7-10 days, and the drug solution should be sprayed on the middle and lower parts of the rapeseed to improve the application effect. Surgical Stapler Components,Suturing Device Guide Rod,Surgical Stapler Guide Rod,Suturing Device Screw Changzhou Ziying Metal Products Co., Ltd , https://www.ziyingmetal.com