Rape seedling picking can increase yield

Narrow down the pitch and widen the spacing. In the process of transplanting rapeseed, the problems of thinning and insufficient basic seedlings are common. To this end, the nest spacing should be reduced, the row spacing should be widened, and the number of plants should be increased. That is, the original 24 × 30 and 20 × 43 were adjusted to 20 × 40 cm and 22 × 44 cm in the same field. The number is increased by 600-800 plants compared with the traditional equidistance transplantation and wide-narrow row transplantation, and at least 10,000 plants per acre.

Adjust the fertilization ratio. In the application of fertilizers, the principle of "bottom foot, stable seedling, attack, and top-up" is adopted. "Bottom foot" means that the bottom fertilizer accounts for 70% of the total fertilizer application. It is mainly based on organic fertilizers and phosphorus and potassium fertilizers, supplemented by nitrogen fertilizers. 1500 kg of organic fertilizer per mu, 5.5 kg of potassium oxide, and 4-5 kg ​​of phosphorus pentoxide 2-3 kg of nitrogen. Stable seedling fertilizer accounted for 2%, 0.15 kg of pure nitrogen for acres, 0.1 kg of phosphorus pentoxide, and 0.19 kg of potassium oxide. Pan fertilizer accounted for 28%, 1-1.5 kg of pure nitrogen, 1.4 kg of phosphorus pentoxide and 2-7 kg of potassium oxide per mu. "Post-replenishment" is to use 0.1% boron fertilizer solution at the beginning and the end of flowering, add 0.1% potassium dihydrogen phosphate (content above 96%) solution, and spray 50-60 kg per mu.

Pick in time. When the rape grows to 30-40 cm, it begins to pick. Generally, the length of the tip is about 10 cm. The length of the tip is slightly longer than that of the peak, and the length is shorter on the contrary. If you have early flowers, you can also take the same method. Generally, the length of the early flower picking tip is 20-25 cm, and the length of the early flower picking tip is 8-10 cm. It is also necessary to pay attention to the prevention and control of diseases and insects in various periods.

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