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(2) Early application and stable application of fertilizers should be rationally applied according to weather, seedling conditions and soil conditions. In spring, high temperature, heavy rainfall, fertile fertility, waxy fertilization, strong growth of rapeseed, and less application of manure; low temperatures, poor soil fertility, weak rapeseed growth, red-brown stems, and early decay tendency of rape to be applied early and heavy Shi Fei; Manure is generally applied at a height of about 10 cm. Double-low quality hybrid oilseed rape and conventional rapeseed varieties must be applied early, that is, before the Lunar New Year's Eve, generally about 7.5 kg of urea per acre.
(3) Drainage and drainage of sewerage, control of Sclerotinia sclerotiorum in paddy-oil or cotton-oil two cropping areas in the southeastern rice-rice-oil Sanxian area of ​​Hubei Province and the Jianghan Plain, due to the wet soil and soil mass, in order to reduce the field Humidity, to reduce the breeding ground for pathogens, must be more open trenches, deep trenches, and clear trenches after the spring. At the same time, in the first week after the flowering period, use 50% carbendazim WP 500 to 1000 times or sclerotinal powder 1000 to 1500 times to spray the lower part of the plant, spray each time the liquid 80 to 100 kg, prevention and treatment Sclerotinia disease.
How to manage transplanting seedlings before and after winter?
(1) The wax fertilizer should be re-applied before the winter. It is like the last winter fertilizer, like the three winter cover cotton quilt. The wax fertilizer has a warming effect on the soil, which is not only beneficial to the development of the root system, but also can provide nutrients to rape and increase the ability to resist cold. Wax fertilizer is generally used for delayed fertilizers, and after decomposition in winter, it provides part of the nutrients required for the vigorous growth of spring rape. It is generally called "Lao Shi Chun".