The rapeseed strong seedling is conducive to the autumn and winter, and is conducive to the transformation of the various growth stages in the future. Therefore, the growth of rapeseed strong seedlings has a great impact on the yield of rapeseed. It is a key measure to cultivate strong seedlings. To capture the high yield and good harvest of rapeseed, the experience of high-yield units shows that the following points should be grasped during fertilization in seedling stage:
The total nitrogen content of the base fertilizer bed is 50%, mainly organic fertilizer. Generally, 1000-1500 kg of compost is used per acre, and 20~25 kg of phosphate fertilizer is used. When mixing, the soil is mixed and then ploughed into the topsoil. The pig manure water is 1500~2000 kg, and the appropriate amount of chemical nitrogen fertilizer is applied to the seedbed soil together to fertilize the bed soil.
Although the early application of seedlings and fermented rapeseed seedlings does not require much fertilizer, it cannot be deficient in fertilizer, because the "disilution" period of rapeseed seedlings is very early, and the phenomenon of disengagement is prone to occur when fertilization is not timely. Therefore, generally, when 80% of the seedlings are in the seedlings, about 750 kg of thin human and animal waste water per acre is applied, or about 4 kg of urea is applied to the water to prevent the growth of the rapeseed seedlings after 3~4 leaves, and the leaves are red. If the base is fat enough and the seedlings grow vigorously, it is not suitable for top dressing, and the seedlings should be refined in the 4~5 leaf stage to prevent prolonged formation and high seedling formation.
The application of phosphorus and potassium fertility to the phosphorus and potassium fertilizers is more than that of other crops, especially the phosphate fertilizer. The soil phosphate deficiency fertilizer will show obvious symptoms in the seedling stage, which will affect the normal growth of the seedlings. Therefore, the phosphorus and potassium fertilizers in the base fertilizer are not applied or the soil is deficient in phosphorus and potassium. In the seedling stage, more phosphorus and potassium fertilizer should be added. The test showed that the phosphate fertilizer had good effect and high utilization rate before the second leaf stage of rapeseed seedlings. Generally, 15 to 20 kilograms of calcium phosphate is applied, or 20 to 25 kilograms of calcium, magnesium and phosphate fertilizers. If the phosphate fertilizer is applied to the seedbed, it is not necessary to apply phosphate fertilizer, but the 0.2% potassium dihydrogen phosphate fertilizer solution can be sprayed on the foliage, and the potassium fertilizer should be chlorine. Potassium or potassium sulfate is applied before the seedling stage of the seedlings.
After the application of seedlings, fermented rapeseed and seedlings, the management is mainly to promote strong seedlings and increase vegetative bodies. At this time, the amount of nitrogen fertilizer can be appropriately increased to promote the opening of the leaves. Generally, before and after the seedlings are planted, the acres are diluted with about 500 to 750 kilograms of thin human and animal manure water for 2 to 3 times. If the soil is dry and the seedlings are thin, it may be appropriate to apply more. 4~5 leaf stage is mainly controlled, stop fertilizing and watering, carry out seedlings, control and promote the seedlings to smoothly pass the physiological transition period, achieve carbon metabolism balance, increase material accumulation, seedling growth and strong, prevent seedling period from happening phenomenon.
After applying the 5 leaves of the body fat seedlings, the seedlings are enriched. At this time, the temperature begins to turn low. The application rate of nitrogen fertilizer should be controlled to increase the sugar content in the seedlings and enhance the resistance of the plants. In order to improve the hair-rooting ability of the seedlings, it is beneficial to premature sputum after transplanting. A small amount of nitrogen fertilizer can be applied 5 to 7 days before transplanting, and 7.5-10 kg of ammonium carbonate per acre is applied to the water. If the leaf color of rapeseed is lighter, or when the old red leaf phenomenon occurs, combined with spraying phosphate fertilizer, generally use 1~1.5 kg of superphosphate. After soaking for 10 nights with clear water, take the filtrate and add water.
The application of borax fertilizer in rape has a high demand for boron, and it is very sensitive. Boron deficiency will not only affect the flowering of the rape in the late growth stage, but also have a great influence on the seedling stage. Therefore, the fertilization seedling stage also advocates the application of boron. In the seedling stage, it can be combined with topdressing with 0.5 kg of borax per acre for water application. If the seedlings have symptoms of boron deficiency at this time, applying 50 kg of borax fertilizer solution with a concentration of 0.1% to 0.2% for foliar application can promote The blade turns normal and the effect is obvious.
The total nitrogen content of the base fertilizer bed is 50%, mainly organic fertilizer. Generally, 1000-1500 kg of compost is used per acre, and 20~25 kg of phosphate fertilizer is used. When mixing, the soil is mixed and then ploughed into the topsoil. The pig manure water is 1500~2000 kg, and the appropriate amount of chemical nitrogen fertilizer is applied to the seedbed soil together to fertilize the bed soil.
Although the early application of seedlings and fermented rapeseed seedlings does not require much fertilizer, it cannot be deficient in fertilizer, because the "disilution" period of rapeseed seedlings is very early, and the phenomenon of disengagement is prone to occur when fertilization is not timely. Therefore, generally, when 80% of the seedlings are in the seedlings, about 750 kg of thin human and animal waste water per acre is applied, or about 4 kg of urea is applied to the water to prevent the growth of the rapeseed seedlings after 3~4 leaves, and the leaves are red. If the base is fat enough and the seedlings grow vigorously, it is not suitable for top dressing, and the seedlings should be refined in the 4~5 leaf stage to prevent prolonged formation and high seedling formation.
The application of phosphorus and potassium fertility to the phosphorus and potassium fertilizers is more than that of other crops, especially the phosphate fertilizer. The soil phosphate deficiency fertilizer will show obvious symptoms in the seedling stage, which will affect the normal growth of the seedlings. Therefore, the phosphorus and potassium fertilizers in the base fertilizer are not applied or the soil is deficient in phosphorus and potassium. In the seedling stage, more phosphorus and potassium fertilizer should be added. The test showed that the phosphate fertilizer had good effect and high utilization rate before the second leaf stage of rapeseed seedlings. Generally, 15 to 20 kilograms of calcium phosphate is applied, or 20 to 25 kilograms of calcium, magnesium and phosphate fertilizers. If the phosphate fertilizer is applied to the seedbed, it is not necessary to apply phosphate fertilizer, but the 0.2% potassium dihydrogen phosphate fertilizer solution can be sprayed on the foliage, and the potassium fertilizer should be chlorine. Potassium or potassium sulfate is applied before the seedling stage of the seedlings.
After the application of seedlings, fermented rapeseed and seedlings, the management is mainly to promote strong seedlings and increase vegetative bodies. At this time, the amount of nitrogen fertilizer can be appropriately increased to promote the opening of the leaves. Generally, before and after the seedlings are planted, the acres are diluted with about 500 to 750 kilograms of thin human and animal manure water for 2 to 3 times. If the soil is dry and the seedlings are thin, it may be appropriate to apply more. 4~5 leaf stage is mainly controlled, stop fertilizing and watering, carry out seedlings, control and promote the seedlings to smoothly pass the physiological transition period, achieve carbon metabolism balance, increase material accumulation, seedling growth and strong, prevent seedling period from happening phenomenon.
After applying the 5 leaves of the body fat seedlings, the seedlings are enriched. At this time, the temperature begins to turn low. The application rate of nitrogen fertilizer should be controlled to increase the sugar content in the seedlings and enhance the resistance of the plants. In order to improve the hair-rooting ability of the seedlings, it is beneficial to premature sputum after transplanting. A small amount of nitrogen fertilizer can be applied 5 to 7 days before transplanting, and 7.5-10 kg of ammonium carbonate per acre is applied to the water. If the leaf color of rapeseed is lighter, or when the old red leaf phenomenon occurs, combined with spraying phosphate fertilizer, generally use 1~1.5 kg of superphosphate. After soaking for 10 nights with clear water, take the filtrate and add water.
The application of borax fertilizer in rape has a high demand for boron, and it is very sensitive. Boron deficiency will not only affect the flowering of the rape in the late growth stage, but also have a great influence on the seedling stage. Therefore, the fertilization seedling stage also advocates the application of boron. In the seedling stage, it can be combined with topdressing with 0.5 kg of borax per acre for water application. If the seedlings have symptoms of boron deficiency at this time, applying 50 kg of borax fertilizer solution with a concentration of 0.1% to 0.2% for foliar application can promote The blade turns normal and the effect is obvious.
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