With low winter temperatures and weakened microbial activity, the fertilizers that need to be converted have a slow effect, while the winter sowing crops need full fertility, so they must chase the available fertilizers. Nitrogen fertilizer can use ammonium bicarbonate; Phosphorus fertilizer should use superphosphate as possible; Potassium fertilizer can use potassium chloride (but potato and tomato and other chlorine crops should use potassium sulfate in the late growth stage); 45% can be used for compound fertilizer. Compound fertilizer. This is because, compared with urea, ammonium bicarbonate belongs to ammonium nitrogen fertilizer and can be directly absorbed and utilized by crops when applied to soil. Superphosphate is a water-soluble, quick-acting phosphate fertilizer, which is faster than calcium, magnesium phosphate fertilizer. It should be noted, however, that it is best not to use ammonium bicarbonate in greenhouse vegetables, and instead use 45% of three-component fertilizer to prevent ammonia damage.
In winter crops, cruciferous crops account for a large proportion, such as cabbage, cabbage, radish, and rapeseed. These crops are particularly sensitive to boron. At the same time, celery, carrots, etc. are also more sensitive to boron. Boron deficiency is not only seriously affected reproductive growth, and nutrient growth hit the wall, cold resistance decreased, but also easy to induce heart rot.
The application of wax fertilizer can increase the ground temperature by 2°C to 3°C, and can increase the potassium content of crop cells, thereby increasing the water holding capacity of the cells, making the cells not easy to freeze at low temperatures, and strengthening the ability to resist cold. The application of wax fertilizer must vary from crop to crop. Wheat should be applied in mid-to-late December. It is advisable to use more soil-fertilizer for strong seedlings, and for weak seedlings and late-maturing wheat, it is advisable to incorporate appropriate amount of phosphate fertilizer in soil-based miscellaneous fertilizers. Apply about 2,500 kilograms of soil and manure per acre of Datian farmland. The amount of perennial crops of fertilisers should account for 50% of the annual fertilization amount, 5000 kilograms of soil fertiliser per acre field and 2,500 kilograms of pig and cow manure. Apply after frost as snow.
In winter, there are many weather conditions with low temperature and low light. Greenhouse vegetables are more likely to cause a large accumulation of nitrates, especially leafy vegetables and root vegetables. Strictly control the amount of nitrogen fertilizer, increase the application of phosphorus and potassium fertilizers, in particular, can not apply ammonium nitrate, potassium nitrate and other nitrate nitrogen fertilizer. A large number of accumulated nitrates do not harm themselves, but are easily converted to nitrite. Nitrite easily replaces iron in human blood and causes blood poisoning.
In winter crops, cruciferous crops account for a large proportion, such as cabbage, cabbage, radish, and rapeseed. These crops are particularly sensitive to boron. At the same time, celery, carrots, etc. are also more sensitive to boron. Boron deficiency is not only seriously affected reproductive growth, and nutrient growth hit the wall, cold resistance decreased, but also easy to induce heart rot.
The application of wax fertilizer can increase the ground temperature by 2°C to 3°C, and can increase the potassium content of crop cells, thereby increasing the water holding capacity of the cells, making the cells not easy to freeze at low temperatures, and strengthening the ability to resist cold. The application of wax fertilizer must vary from crop to crop. Wheat should be applied in mid-to-late December. It is advisable to use more soil-fertilizer for strong seedlings, and for weak seedlings and late-maturing wheat, it is advisable to incorporate appropriate amount of phosphate fertilizer in soil-based miscellaneous fertilizers. Apply about 2,500 kilograms of soil and manure per acre of Datian farmland. The amount of perennial crops of fertilisers should account for 50% of the annual fertilization amount, 5000 kilograms of soil fertiliser per acre field and 2,500 kilograms of pig and cow manure. Apply after frost as snow.
In winter, there are many weather conditions with low temperature and low light. Greenhouse vegetables are more likely to cause a large accumulation of nitrates, especially leafy vegetables and root vegetables. Strictly control the amount of nitrogen fertilizer, increase the application of phosphorus and potassium fertilizers, in particular, can not apply ammonium nitrate, potassium nitrate and other nitrate nitrogen fertilizer. A large number of accumulated nitrates do not harm themselves, but are easily converted to nitrite. Nitrite easily replaces iron in human blood and causes blood poisoning.
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