1, early recovery manure. As the saying goes: "Spring dishes fiercely like tigers." When the temperature rises above 10°C, rapeseeds are gradually twitching. This is the period of vigorous growth in which rapeseed grows fastest and absorbs most fertilizer. In terms of specific measures, the manure should be “fast†and “earlyâ€, with urea 7.5–10 kg or ammonium bicarbonate 25 kg per mu. The difference in growth potential should be applied early on February 20th, and the good growth can be applied at the end of February to early March with a convulsion of 10%-20%.
2, Qiao Shi Hua Fei. As the saying goes: "Mill pours, vegetables watering." Rapeseed is infinitely inflorescence, with a long flowering period, flowering edges, edge angles, and mature edges. Therefore, seedlings are applied before flowering or at the flowering stage to increase the junction angle rate and reduce the shedding and shade angles. Generally at the beginning of flowering, 2-3 kg of urea or 7-8 kg of ammonium bicarbonate should be applied. Early fertility and good growth may not be applied, it is necessary to prevent excessive application of too late and too much fertilizer, so as not to cause delay in greediness, but later to reduce production but serious. For the general fertilizer-poor fields, 0.2 kg of potassium dihydrogen phosphate, 0.5 kg of urea, 0.15 kg of boron fertilizer (water-soluble in water) can be used, and then 75 kg of water can be sprayed at full flowering stage. Resolving the lack of fertilizer in the later stage can also solve the problem of flowering, increase the seed-setting rate, and increase the output.
Second, the Qinggou drain, to prevent flooding Spring rain in the Yangtze River and Huai River area more soil heavy soil, air humidity, the root activity is extremely unfavorable. Rapeseed is the most afraid of the crops, often stagnant water will cause waterlogging, rot, dead seedlings. To this end, it is necessary to clean up the "three ditch," and clear the ditch in time after the rain. It is necessary to truly connect the ditch and ditch, and rain to live in the fields.
Third, to prevent the main, comprehensive prevention and comprehensive prevention and control of disease prevention technology, to prevent the main prevention and control combination. Sclerotinia disease is the main disease of rapeseed, and severe crop failure is caused by lodging, and the yield is not high. Should generally be in the rape flowering period, when the leaf disease rate occurs to more than 10%, the stem disease rate occurred when more than 1% began to control. Can generally be used per acre 150 grams of gram of cefotaxime or 70 grams of 70 grams of water spray, according to the degree of disease prevention 1-2 times. The field of prevention and control 2 times, 7-10 days after the first application, once again control.
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