Rapeseed wintering management focuses on preventing seedlings from freezing

At present, when rape enters the wintering period, it is necessary to focus on strong seedlings and anti-freezing to grasp the following field management measures.

As a result of seedling supplementation, rapeseed seedlings are very important for improving seedling quality and enhancing antifreeze capacity. 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 fertilizers, and lean plants can increase urea by 5 to 10 kilograms per acre, and promote the transformation of the seedlings.

Clearing the gully: 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.

Warming up: In addition to the favorable conditions for high temperature and warm weather, the selective medicine should be eliminated 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 anti-frozen: the board to transplant rapeseed to do a good job in winter and spring soil loose soil roots, mulch insulation and antifreeze. 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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