"The temperature is high and low, the rainy weather is more, the rainfall is larger, the rapeseed is late in the spring, the tree is slow, and the growth period is delayed by 5~7 days." On March 30, Zhang Xuekun, a researcher at the Chinese Academy of Agricultural Sciences, told reporters. The recent abnormal weather has affected the rapeseed seed.
At present, rapeseed in Hubei Province has been twitching and flowering, which is an important period for seeding. Zhang Xuekun said that in response to climate impacts, it is necessary to seize the agricultural time and respond effectively. Field management in the middle and late stages of rape is particularly important.
1. Clear the ditch in time, increase the temperature and reduce the stain. Grasp the weather and clear the gap, timely clear the field ditch system, ensure that the "three ditch" is unblocked, so that there is no dark stain on the plough layer, no clear water in the ditch, prevent waterlogging, increase soil temperature, and promote the growth and development of rapeseed. The soil culture of the ditch is on the edge of the rapeseed line to improve the resistance of the rapeseed.
2. Strengthen monitoring and prevent pests and diseases. The initial flowering stage is an important barrier for the prevention and control of Sclerotinia sclerotiorum. The rapeseed grows prosperously, the ventilation and light transmission in the field is poor, and the sclerotinia sclerosis is prone to occur after the temperature rises. All localities should strengthen forecasting and forecasting, and guide farmers to prevent and cure Sclerotium disease in time after the weather has cleared.
3. Control and promote combination and scientific fertilization. According to the timely and appropriate amount of seedlings, the vigorously growing fields should control the application of nitrogen fertilizer and appropriate application of phosphorus and potassium fertilizer.
In response to the postponement of the growth period of rapeseed this year, all localities should carry out "one spray three defenses" during the flowering period. The application rate per acre can be sprayed according to 200g potassium dihydrogen phosphate, 100~200g carbendazim, 50~100g Suile boron to 50kg, to promote growth, prevent premature aging, antibacterial disease, anti-high temperature Cooked.
4, timely harvest, cooked after the pile. Oily rice and dryland rapeseed should be harvested when the 80% of the whole field rapeseed is yellow, and piled on the ground or sun dam for 5-7 days. After ripening, select the weather and threshing to improve the oil content.
The one-time mechanical harvest of rapeseed is carried out after the pods are completely yellow. In order to timely transplant the oil-retaining rice area, it can be harvested when the whole field of Liucheng rapeseed is yellow, and the rapeseed is cut from the middle and lower part of the plant, piled on the edge of the field or dried in the field, and covered with film for 3-4 days. Accelerate the ripening of rapeseed and increase the 1000-grain weight and oil content.
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