Raising Seedling and transplanting to increase rape yield Management techniques of raising seedlings and transplanting in rapeseed

Rape is one of the main spring crops in Tengchong County. Rape seedling transplanting can not only solve the contradiction of stubble and the problem of strong seedlings overwintering, but also increase rape yield, which has become the main way of rape cultivation in our county, but improper management after transplanting will also lead to yield decline and affect the enthusiasm of farmers to plant rape.

Oilseed rape

1. Seedling stage management after planting:

(1) early application of live plant fertilizer. 5-7 days after rape transplanting, 1500-2000 kg of human and animal feces per mu or 3-5 kg of urea mixed with water were applied. So that the root soil fertilizer fusion, early return to green to promote strong.

(2) loosening the soil early and ploughing and weeding frequently. After the rape is alive, ploughing and loosening the soil in order to ventilate and weed, promote the stable growth of the root system, and resist freezing early.

(3) drought resistance and waterlogging prevention. The autumn drought is serious, so it is necessary to resist drought and preserve soil moisture, but do not flood irrigation. There is a lot of autumn rain, so we should pay attention to preventing stains, and timely open the "three ditches" to drain water to ensure that the water flow is smooth and there is no stagnant water in the field.

(4) pest control. Rape seedling diseases and insect pests include aphids, rape downy mildew, rape white rust, etc., which can be controlled by 10% aphidione, 75% chlorothalonil, 50% methyl topiramate and so on.

(5) strengthen anti-freezing measures. Rape seedlings are covered with soil fertilizer, plant ash and crop straw before winter to prevent or reduce frost injury.

2. Management of bud bolting stage.

(1) heavy application of bolting fertilizer. When bolting height is 10-15cm, apply 8-10 kg urea per mu or 1000-1500 kg human and animal feces plus 3-5 kg urea per mu. The specific amount of fertilizer should be increased or decreased appropriately according to the weather and seedling conditions; skillfully applying micro-fertilizer and spraying 50-75 kg per mu of 0.2% borax aqueous solution is beneficial to growth.

(2) do a good job of irrigation and drainage. During the bolting period of rape, in case of drought, half-ditch water should be irrigated in the ditch to maintain field humidity; Rain Water often pays attention to clear ditch drainage and prevent waterlogging damage.

(3) prevent frost injury in spring. It is necessary to apply fertilizer scientifically, pay attention to the ratio of nitrogen, phosphorus and potassium, and apply more organic fertilizer to enhance resistance.

Rape transplanting

3. Management of flower horn stage

(1) skillfully applying flower fertilizer. Flower fertilizer should be applied properly, early, about 5 kg urea per mu; spray 50-75 kg 1-2% potassium dihydrogen phosphate aqueous solution outside the root.

(2) spraying boron fertilizer. In order to prevent rape from boron deficiency, 50-75 kg 0.2% borax solution was sprayed per mu in the early flowering stage of boron deficiency fields in sunny evenings.

(3) pest control. In the middle and later stage of rape, there are mainly aphids, downy mildew, Sclerotinia sclerotiorum, white rust and other diseases and pests. Focus on the control of Sclerotinia sclerotiorum, spray 40% Sclerotinia sclerotiorum with water per mu from the early flowering stage to the full flowering stage of rape for 1-2 times.

(4) timely harvest. "rape is 80% yellow and 100% harvested". At 25-30 days after final flowering, 2 pods appear loquat yellow and 1 jump 3 on branches appear yellowish green.