It is very important for seedlings to raise seedling quality and enhance antifreeze ability. When transplanting rapeseed, the pediculous and sufficient growing plots may not be planted, and they will grow steadily and sparsely. However, late planting and late planting and base fertilizers have not been fully applied. Currently, poorly growing weak seedlings and stiff seedlings (leaves only have about 3 leaves). In addition, the rapeseed fields with uneven red stems or uneven growth should be supplemented with fertilizer as early as possible. Fertilization is dominated by organic fertilizer. The lean plants can increase the application of urea by 5 to 10 kilograms per acre to raise the seedlings to catch the yellow pond, promote the transformation of the seedlings, and strive to make the seedlings overwinter.
Clear waterlogging is an important obstacle to the high yield of rapeseed. For undistributed fields, we must seize the favorable opportunity to blitz open the trenches inside and outside the field, improve the capacity of drainage and sluice, avoid freezing and thawing, and increase frost damage. For the unpatched plots that have been ditched, it is necessary to deepen and clear the plots, in particular, to increase the horizontal and vertical trenches, and to connect the gully heads to keep the gully open and to ensure smooth drainage and dry weather to prevent severe winter and spring rains. Waterlogging. When ditching and digging furrows, the furrows should be evenly covered in the roots of rapeseed. In particular, the roots of the tall gourd seedlings should be buried in the soil to avoid the emergence of seedlings and the lack of seedlings.
In addition to warming up the field plots for grass damage, it is necessary to seize the favorable opportunity for warm and warm temperatures before winter, and to select the appropriate drugs as soon as possible. More than 50 common weeds per square foot and more than 10 broad-leaved weeds per square foot must be removed. The daily average daily temperature should be above 5°C in order to improve the effectiveness of the treatment and to avoid phytotoxicity. Rapeseed field weeds can be controlled with high-efficiency flupirtine or fluazifop-Porcine, etc. For broad-leaved weeds such as pigs, cattle, and broadleaf weeds, weeds can be used to control weeds, single and dicotyledonous weeds. The mixed fields can be mixed with the above-mentioned drugs or their compounding agents can be used for prevention and control, and can also be combined with manual culturing of winter and spring cultivators.
Covering antifreeze plates and transplanting rapeseed should be done well in winter and spring, and protect the root from heat and freeze. The use of straw to cover the combination of straw returning and rapeseed field winter coverage, generally 150-200 kg per straw with uniform coverage, enhance cold tolerance of rapeseed. 3 leaf stage not using paclobutrazol control, early sowing early planted rapeseed Wang long seedlings, to be warm sunny winter warming per acre with 15% paclobutrazol wettable powder 60 ~ 70 grams of water plus 30 ~ 50 kg spray to achieve dwarfing , increase green, antifreeze effect.
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