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The key management of rape after the beginning of spring should be prevented from lodging
Scientific application of fertilizer: The application of manure after the beginning of spring is the key to promoting the stability of rape. The amount of fertilizer should be appropriate, generally accounting for about 30% of the total amount of fertilizer. Before the convulsions, that is, at the end of February or early March, about 1,000 kilograms of cooked manure or urea or urea of ​​7.5 to 10 kg per acre is applied. But to prevent excessive manure, growth and growth. Timely Irrigation: Drainage of rapeseed after the beginning of spring requires more water for bolting and flowering, and timely irrigation during drought to ensure the demand for water. However, after the beginning of spring, it is rainy, the soil moisture is high, and the humidity in the field is large, which often induces the occurrence and harm of Sclerotinia sclerotiorum. Therefore, it is necessary to clean up the ditch river in time after the beginning of spring to ensure that the ditch and the river communicate and prevent the stains after the rain. The cultivator loosens the soil and raises the roots of the soil: After the beginning of spring, it seizes the favorable opportunity before the closure of the line to carry out cultivating tillage; remove the weeds to reduce the occurrence of pests and diseases; raise the temperature of the ground to prevent cold attacks. Take the initiative to prevent pests and diseases: In rapeseed convulsions and early flowering period, use 50% carbendazim 150 grams per mu, spray 50 kg of water on the control of sclerotia; use speed kill 8 to 10 grams of water plus 30 kg of spray to prevent aphids . Spraying regulators: spraying growth regulators in the flood season, using 15% paclobutrazol per acre 30 grams, 25 to 30 kg of water evenly spray. It can increase the plant's resilience and prevent late lodging.