Cultivating qualified and strong seedlings and paying attention to the quality of transplanting are important steps in promoting early-onset rapeseed and anti-sterile seedlings.
Preparation before transplanting
1. Pay attention to the rotation. Rape continuously for many years, prone to sclerotinia and viral diseases, affecting rapeseed yield, so it should be replaced by rotation. 2. To finely prepare the ground. Transplanting rapeseed should not be extensively cultivated, especially the paddy fields transplanting rapeseed should be drained and dried 5 to 7 days before ploughing, and dry ploughing should be done to improve soil structure and enhance soil permeability. Practice has shown that the soil moisture content in the dry-trenched field is maintained at 25% within 4 days after transplanting, and the dead-root rate is only 0.8%-1.4%. Therefore, rapeseed preparation must achieve the requirements of field leveling, soil fineness and grass netting, and create a good growing environment for the development of rapeseed roots. 3. To match fertilizer, prevent a single nitrogen. According to the analysis, for every 100 kilograms of rapeseed produced, the plant needs to absorb 5.8 kg of nitrogen, 2.5 kg of phosphorus pentoxide, and 3 kg of potassium oxide from the soil. It also needs trace elements such as boron and calcium. Therefore, base fertilizer must be applied according to the ratio. Taking a rape field with a yield of 200-250 kilograms per mu as an example, 40-50 kg of ammonium bicarbonate, 30-40 kg of superphosphate, 15-20 kg of potassium chloride, and 1.5-2 kg of boron fertilizer should be applied for early stage seedlings. Provide nutrition foundation.
Specific requirements for transplanting
1. Transplanting at the right time should not be too late transplanting. Early and timely planting is conducive to making full use of the appropriate temperature in the late autumn and early winter, and strives to grow early in the morning. The general requirements are to be planted in the middle and late October, and the Sanmian field will not be allowed to pass until about the beginning of November. 2. The narrow and narrow narrow-row rows are cultivated. Paddy field rapeseed soil has poor viscous weight, poor drainage and air permeability, and it is more important to promote the narrow and narrow rows of deep narrow-channel cultivation to prevent rot-root dead seedlings during rainy weather, and to lay a foundation for improving ventilation and light transmission, promoting individual development and improving population structure. Paddy rice field width 1.4 meters, the width of the car ditch, the depth is 20 cm, the ditch and waist ditch depth, width are 30 cm design, gully scatter and sprinkle on the surface, leveling fine. When transplanting, 40 cm wide row spacing, narrow row spacing, 20 cm ditching and transplanting, 6 ditching each car, narrow rows arranged at the side, rape seedlings planted at a planting distance of 20-22 cm, planting 0.9 thousand per acre. 10,000 plants. 3. To plant large seedlings. When transplanting, it is required to meet the criteria of “6-inch seedling height, 6 green leaves, 6-mm thick root neckâ€. Do not plant weak seedlings, and do not mix small and large seedlings. When transplanting, plant fresh seedlings. Do not plant overnight seedlings. Starting from the seedlings, while transplanting, while soil, while watering, will help shorten the return period. To plant the root seedlings, do not plant "hanging root" seedlings to prevent them from hanging out. 4. Implement the ditching and planting. Earthy viscous rice fields, if they are planted and transplanted on a rainy day, they are likely to cause water accumulation in the seedlings and are prone to black root rot after transplanting. However, if they are planted in open trenches and then mixed with manure, the roots will be rooted. The soil is cool and breathable. After transplanting, it will return to green and will not appear dead and rotten.
If rot-root dead seedlings are found after transplanting, they can be drained in time to reduce the moisture in the cultivating layer; cultivating in the rows, renewing the air in the roots to eliminate toxins; removing the dead seedlings to make up the plant to prevent ridges and ridges; Promote comprehensive remediation measures such as new roots.
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