What technical points should be noted when raising rapeseed seedlings?
How do you raise rapeseed seedlings? The following techniques can be used for raising rapeseed seedlings: 1. Seedbed preparation: Choose a plot with fertile soil, deep soil layers and convenient drainage and irrigation as the rapeseed seedbed. The ratio of seedbed area to field area is 1:7--8. For seedbed fertilization, organic fertilizer should be the main input, with additional phosphorus and potassium fertilizer. Generally, each mu of seedbed should be applied with decomposed human and livestock manure...
What should be noted when raising rapeseed seedlings? Please advise.Because rapeseed seeds are small and have a high germination rate, sowing often easily leads to phenomena such as excessive sowing rate, overly dense seedlings, crowded seedlings, later nutrient deterioration, poor growth, weak seedlings and leggy seedlings. After such rapeseed seedlings are transplanted to the field, they have poor stress resistance, slow green-up, many dead seedlings, and are prone to lodging later with low yield. Therefore, when raising rapeseed seedlings, the sowing rate per unit area must be well controlled, and sparse sowing and even sowing should be achieved as much as possible.
For rapeseed seedling raising, the ratio of seedbed area to field area is generally controlled at about 1:5, that is, the seedbed area required for each mu of field should be about 0.2 mu (two fen of land). The sowing rate per mu of seedbed is generally controlled at about 0.5 kg, that is, only 0.1 kg (100 grams) of seeds need to be purchased for each mu of field. During actual sowing, the sowing rate can be appropriately adjusted according to specific conditions. For example, if the seeds are small, sowing is early, the germination rate is high, land preparation quality is high, soil moisture is suitable, management is careful, and there are few seedling-stage pests, a little less can be sown; otherwise, a little more should be sown, but the sowing rate per mu of seedbed generally should not exceed 0.6 kg. To ensure even sowing, the seeds should be mixed with sieved fine soil and broadcast. In addition, after rapeseed emerges, at the 3-leaf stage, thinning should also be carried out together with weeding to ensure even seedling distribution with leaves not overlapping. On this basis, strengthening management is the only way to cultivate strong seedlings and lay a good foundation for future high yield of rapeseed.
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