Continuous drought to prevent rapeseed

Since mid-September, precipitation has been low in most parts of the province. The precipitation from mid-September to mid-November is 2 to 90% less than normal. From the calculation results of the Provincial Meteorological Observatory's Agricultural Drought Index, the farmland soil moisture in the province was basically deficient in mid-November, and the drought situation was more developed than in early November. According to the medium-term weather forecast released by the Central Meteorological Observatory at 10:30 am on November 24, in the next 10 days, there will be no significant precipitation in meteorological arid areas such as Henan, Shandong, Jiangsu, and Anhui, and meteorological drought will continue and develop. How does this kind of climate affect the production of rapeseed in our province and what are the current agricultural operations that farm management should pay attention to? According to an interview with the reporter, Zhang Yongtai, director of the Yangzhou Comprehensive Experimental Station of the National Rape Modern Industrial Technology System, said that last year the province saw more rain at the late autumn sowing, and the rape spot was heavy. In mid-November, the province also experienced a wide range of cooling weather. Nearly a month earlier, it has an adverse effect on the growth of rapeseed. Although meteorological drought has occurred since autumn sowing in our province, the overall climate conditions are conducive to the growth of rapeseed. The appropriately planted rapeseed plants are robust and can be absorbed into the soil at the bottom of the river. The ability to resist drought is stronger. At present, watering is not required. Drought resistance. The delayed transplanting of rapeseed due to the small amount of growth, the ability to absorb fertilizer and water is weak, the dry soil of the field should be properly watered and drought-resistant. For the rapeseed field where the total amount of base seedling fertilizer is less than 8 kilograms, the top-dressing 5-8 kilograms of urea is used as a strong seedling fertilizer per acre to promote growth and form a strong winter seedling. It should be noted that the long-term drought and no rain after transplanting rape, prone to the phenomenon of lack of seedlings and ridges, it is necessary to do a good job to fill the gaps. Due to the dry weather, live rapeseeds are prone to emergence of uneven seedlings. When planting, bring water to promote early living trees. Miao more places and time seedlings, to prevent seedlings, seedlings, seedlings poor quality, leaving 20,000 to 30,000 per acre (35 to 45 per square meter stay), after the seedlings in time to prevent the roots of earth to prevent freezing damage. Zhang Yongtai also reminded that long-term light tillage and other light farming practices will lead to soil compaction, cultivating loose soil to eliminate compaction, can promote the growth of rapeseed roots, combined with roots, can effectively enhance the rape resistance. For crops that have not been subjected to chemical weeding or chemical weeding before they are sown, cultivators can also be used to perform manual weeding on cold heads. In addition, due to drought can easily lead to large-scale occurrence of aphids in rape fields, should be treated as soon as possible to prevent and control at the same time to combat SBPH, in order to reduce the overwintering base.

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