Rape winter pipe catch "four promotion"
Fertilizer and water supply to stabilize long seedlings require more fertilizer at the seedling stage. In addition to rooting and watering, it is also necessary to chase the seedlings in time after living. After “Xiaohanâ€, the fertilizer is applied again. Usually, the fertilizer is applied per acre. For human or animal manure or biogas slurry 20-30 tons, urea can also be 7.5 to 10 kg and potassium 7.5 to 10 kg or nitrogen, phosphorus and potassium compound fertilizer 30 to 40 kg watered 20 to 30 kg pouring, in order to facilitate warming antifreeze, And use it to make wax spring. Rape is very sensitive to boron, it should pay attention to increase boron fertilizer, usually 0.5 kg of borax per acre, the first borax with a small amount of hot water, and then poured into the fertilizer in the water to prevent "flowering but not real" disease.
Drought should be timely drought-resistant water supply, generally combined with top-dressing, so that heavy water thin fertilizer, in case of severe drought, the implementation of furrow irrigation, can not flood irrigation. At the same time, do a good job of trench drainage to prevent waterlogging.
The cultivating and weeding promote hair roots, "long leaves first long roots, long roots rely on cultivators." Rape is mostly no-tillage and transplanting, so it is prone to soil compaction, poor physical and chemical properties, and a lot of weeds and other weeds. Therefore, we must cultivate weeds in time after live hoeing, and combine cultivating soil to stabilize hoe to facilitate deep rooting and development. Late planting, shallow planting and tall planting should pay more attention to cultivating the soil and protecting the roots.
Chemical weeding: In the period of 3 to 5 leaves of aphid weeds and other weeds, use 50 ml of 12.5% ​​Nigrosin per mu and add 40 kg of water evenly to the weeds to prevent weeds.
The timely management of insects to promote strong rapeseeds is prone to aphids and cabbage caterpillars. Control locusts: 10% per acre can be used to kill 2,000 times the net. The control of cabbage caterpillars: per acre with 2.5% hypertonic emulsifiable concentrate (also known as cypermethrin, Qingzhai tiger a clear) 30 ml watered 30 ~ 40 kg spray.
Removal of early moss-promoting new moss Some rapeseed are prone to have early moss in the winter due to excessive seedling age or excessive sowing. Early mosses consume nutrients without freezing. In this regard, should be 10 to 17 centimeters when the early moss, choose to clear the upper part of the 7 to 10 cm sunny days, and timely application of a quick nitrogen fertilizer, promote its long new moss.
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