Effectively Raise the Quality of Rape Transplanting

At present, rapeseed production in Changshu has the following characteristics: First, excellent varieties. The rapeseed varieties in the city are mainly Suyou No. 4 and supplemented by Suyou No. 1. The coverage of high quality varieties is above 95%. The second is good emergence. In late September, the stage of seedling and sowing is appropriate and the area of ​​seedlings is large. The third is favorable weather conditions. Since October 1, the weather is normal, the temperature is suitable, the sunshine is adequate, the rain is moderate, and the seedlings grow well. The fourth is to keep the seedlings dense. Affected by factors such as small plot area, high seeding rate, relatively uniform emergence, and infrequent emergence of thinning seedlings, the seedling density of the seedbed is high, which is unfavorable for cultivating strong and strong. In view of the above situation, we must do our best to grasp the mid-late management of seedbeds, and transplant with high standards and high quality.

Suitable for early-stage planting and autumnal competition. Early in the month of October, early-stage and early-stage planting will be started in late October and early November to strive for transplanting before and after the beginning of winter. Do the "with fertilizer, with medicine, with soil" transplanting (1 week before planting "starting fat", 2-3 days before planting with "arise medicine", planted before the night as the water chestnut pouring "water"). According to the size of the seedlings transplanted in batches, not to plant large seedlings and over seedlings. One day before transplanting, 50% acetochlor EC 100 ml and water 50 kg per acre were sprayed on the soil to close the field. When transplanting, minimize the damage to the topsoil to improve the weeding effect.

In the past few years, due to the increase in the price of agricultural materials and other factors, it has been difficult to increase the amount of fertilizer input, and the soil fertility has declined, affecting the high and stable yield of rapeseed. Appropriately increase the amount of fertilizer and balance the fertilization. It is required that 15 kg of pure nitrogen should be used per acre, the ratio of N, P and K should be 1:0.5:0.6, and the base seedling fertilizer should account for 55%-60% of the total amount of fertilizer. The basal fertilizer uses high-concentration compound fertilizer to increase the level of phosphorus and potassium, and at the same time enlarge the area of ​​application of boron fertilizer. Specific requirements: Apply 45% of ternary compound fertilizer 25-30 kg, 20 kg of ammonium bicarbonate or 10 kg of urea per mu, plus 0.5 kg of borax. Ammonium bicarbonate was applied overnight before transplanting, and the compound fertilizer, boron fertilizer and urea were mixed and applied between the acupuncture points and the acupoints to prevent the direct contact of the fertilizer and the rapeseed to cause the damage.

Groove system to prevent water and soil damage before transplanting to deepen the trench outside the field, open the field trenches when transplanting, adhere to the first ditch after the first vegetable or ditch the side of the growing vegetables. One vertical ditch every 3-4 lines, one horizontal ditch every 30-40 meters, dig through the ditch head. After the transplanting, clean up the trenches so that the trenches can communicate with each other.

The rational density and competition for high-yielding local rapeseed transplanting density is usually low and should be increased by 20% on the original basis. The average density is required to exceed 6500 plants per acre (row spacing 45-50 cm, plant spacing 20 cm).

One type of management will be focused on "three supplements and one defense" after the management of the issue. (1) Make up. For the trenches that have not yet been completed, the trenches will be repaired and supplemented. (2) supplement base fertilizer. Insufficient basal fertilizer timely replant fertilizer after planting. (3) supplementation. From late November to mid-December, according to the timely removal of field grasses, the main plots of grass weeds were sprayed with 12% clethodim EC, 40 ml of water and 50 kg of water per acre, and the medication was suspended before the onset of the cold current. (4) Prevent pests. Timely knowledge of the occurrence of pests and diseases in the field, and the use of appropriate chemicals for prevention and control.

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