First, seedlings in the morning, seedlings are seeded with large direct sowing seedings, sowing late, especially rapeseed rape in the three-maize system, generally planted at the end of October, often due to improper management of seedlings and fertilizers, resulting in crowded vegetable seedlings, resulting in line seedlings, weak seedlings Therefore, should be 2 to 3 leaf rape time seedlings, 4 to 5 leaves when the Dingmiao, transfer and thinning to ensure that the whole seedlings, seedlings per acre 1.2 to 15,000, to compensate for the lack of late enough to broadcast the group.

2. Early cultivating and weeding after weeding and cultivating the seedlings. Early cultivating and ground loosening, especially for rapeseed direct seeding. Soil moisture is relatively high. Soil compaction and weeds are a serious hazard. . Before the advent of low temperature, one deep cultivator was planted, roots were sowed, heat preservation and antifreeze were applied to promote the growth of rapeseed roots. Weeds and more plots, 20% Napu can be used per acre net 80 mg, watered 50 kg, the stems and leaves to spray grass, can also be used 12.5 per acre with 50 ml Caesar can EC, watered 50 kg aligned Weed stems and leaves evenly spray, the effect is better.

Third, as early as fertilizer to promote seedlings on the basis of the application of base fertilizer, generally after the Qimiao early application of long-term fertilizer, per acre with 4 kg of urea on the water splashing; each time after the seedlings should be suitable to raise seedling fertilizer, per acre With 500 ~ 1000 kg of thin manure dipped in water; Dingmiao 1 mu seedlings after topdressing, with 10 people drooling manure pouring equipment. In the application of nitrogen fertilizer, it should also pay attention to increase the application of phosphorus and potassium fertilizer, the general application of superphosphate 20 kg per mu, in mid-December per acre topdressing 20 pigs cow dung for wax, in order to improve cold resistance. The best application of fertilizer is to reduce the loss of fertilizer. The live rapeseed needs more boron fertilizer, and the seedling reaction is more sensitive when lacking boron. It can spray 0.5 kg borax fertilizer per acre after fixing the seedlings.

Fourth, early prevention Early morning early flowering rapeseed because of weak nutrition before winter, prone to early onset of early flowering phenomenon, depending on the situation to prevent and cure: 1, on the growth of better, fertility than the foot of the field for deep cultivator, in the rape A portion of the root system was cut in a depth of about 7 to 10 cm near the crotch to temporarily inhibit growth. When the rape began to fall, it was supplemented with a suitable amount of nitrogen fertilizer. 2, the poor growth of rape can be re-applied nitrogen fertilizer method, can effectively delay the vegetative growth, increase the amount of vegetative growth, to prevent the occurrence of early phlegm. 3, on rapeseed fields that may have been convulsions before the year, timely picking alfalfa to inhibit the top of the plant, so that the nutrients from the main stem to the lower part of the branch, postponed the birth process. After harvesting, each mu of timely release of livestock manure water 1500 ~ 2000 kg, or 5 kg of urea poured water poured to promote branching.

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