In recent years, with the promotion and application of corn no-till seeders with fertilizing devices, the application of summer corn seed fertilizers has become more and more common. Application of seed fertilizer can promote the growth and development of corn seedlings, and is conducive to the cultivation of strong seedlings, laying a good foundation for the high yield of summer maize. However, there are still many problems in the application of the seed fertilizer in the current production. If the fertilizer is improperly applied, it is easy to cause germination or burning, which causes unnecessary loss to the corn production.
harm
The damage caused by improper application of fertilizers to corn seeds or seedlings is manifested in many aspects. First, the seeds are in direct contact with the fertilizer layer, and the seeds cannot germinate properly because they cannot absorb enough water. After a little longer, the seeds slowly rot. Second, although the seed can normally absorb water and germination, the young radicle encounters a high concentration of fertilizer in the lower stalk, and the seed root is " burned " by the fertilizer , causing the bud to die during the unearthing process. Third, although the seed can be normally emerged, the root system is affected by the high concentration of fertilizer area during the growth process. The roots appear black-brown necrotic spots or root atrophy, which leads to the decline of roots' ability to absorb water and nutrients. Growth retardation, short, thin, and yellowish seedlings.
the reason
The main cause of seed simmering or burning seedlings is improper application of seed fertilizer. First, the application rate of seed fertilizer is too large. Some farmers apply a large amount of fertilizer when planting. Some even apply all fertilizers at the same time as seeding. The application rate of seed fertilizer is as high as 80 kg or even 100 kg per mu , resulting in seeds. Or the root system is in contact with the fertilizer during the emergence process, causing burning or burning. The second is the mixed application of seed fertilizer and seeds. Although the application rate of seed fertilizer is not too large, due to the mixed seed and fertilizer, the seeds are directly contacted with the fertilizer to cause burning or burning. The third is to use pure nitrogen fertilizer as seed fertilizer. The pure nitrogen fertilizer has strong volatility ( such as ammonium bicarbonate ) , and some contain components that have some corrosive effects on seeds or shoots ( such as urea). Biuret ) , it is easy to cause burning. The fourth is to apply a large amount of fertilizer when sowing. Since the soil moisture is better when the alfalfa is planted, the fertilizer will quickly absorb moisture after being applied to the soil, and a high concentration of fertilizer film is formed in the soil, which aggravates the damage caused by the seed fertilizer or the seedling. Compared with the practice of pouring " mengtou water " after sowing, the seed fertilizer is more likely to cause burning seedlings.
Precautions
First, the use of granular fertilizers as seed fertilizers, such as nitrogen, phosphorus and potassium compound fertilizer, diammonium phosphate and so on. This type of fertilizer is more fluid, more suitable for planting with the planter, and the fertilizer is applied evenly. Second, do not use pure nitrogen fertilizer as seed fertilizer, such as urea, ammonium bicarbonate. Third, the amount of fertilizer applied to control the species, both prone to burn seedlings administered amount is too large, the other will result in unnecessary waste of fertilizers, generally 15 to 20 kg per acre NPK appropriate. Fourth, the seed fertilizer must be applied separately from the seed, and it should be applied deep. The lateral spacing of the rows of fertilizers and seeds should not be less than 5 cm, and preferably can be applied to the side of the seed row. The fifth is to strictly control the amount of fertilizer applied during sowing. Sixth, in the case of a large amount of seed fertilizer application, it is best to pour a " mengtou water " to play the role of " dilute " the seed fertilizer, which can reduce the burning phenomenon caused by a large number of fertilizers to a certain extent.
harm
The damage caused by improper application of fertilizers to corn seeds or seedlings is manifested in many aspects. First, the seeds are in direct contact with the fertilizer layer, and the seeds cannot germinate properly because they cannot absorb enough water. After a little longer, the seeds slowly rot. Second, although the seed can normally absorb water and germination, the young radicle encounters a high concentration of fertilizer in the lower stalk, and the seed root is " burned " by the fertilizer , causing the bud to die during the unearthing process. Third, although the seed can be normally emerged, the root system is affected by the high concentration of fertilizer area during the growth process. The roots appear black-brown necrotic spots or root atrophy, which leads to the decline of roots' ability to absorb water and nutrients. Growth retardation, short, thin, and yellowish seedlings.
the reason
The main cause of seed simmering or burning seedlings is improper application of seed fertilizer. First, the application rate of seed fertilizer is too large. Some farmers apply a large amount of fertilizer when planting. Some even apply all fertilizers at the same time as seeding. The application rate of seed fertilizer is as high as 80 kg or even 100 kg per mu , resulting in seeds. Or the root system is in contact with the fertilizer during the emergence process, causing burning or burning. The second is the mixed application of seed fertilizer and seeds. Although the application rate of seed fertilizer is not too large, due to the mixed seed and fertilizer, the seeds are directly contacted with the fertilizer to cause burning or burning. The third is to use pure nitrogen fertilizer as seed fertilizer. The pure nitrogen fertilizer has strong volatility ( such as ammonium bicarbonate ) , and some contain components that have some corrosive effects on seeds or shoots ( such as urea). Biuret ) , it is easy to cause burning. The fourth is to apply a large amount of fertilizer when sowing. Since the soil moisture is better when the alfalfa is planted, the fertilizer will quickly absorb moisture after being applied to the soil, and a high concentration of fertilizer film is formed in the soil, which aggravates the damage caused by the seed fertilizer or the seedling. Compared with the practice of pouring " mengtou water " after sowing, the seed fertilizer is more likely to cause burning seedlings.
Precautions
First, the use of granular fertilizers as seed fertilizers, such as nitrogen, phosphorus and potassium compound fertilizer, diammonium phosphate and so on. This type of fertilizer is more fluid, more suitable for planting with the planter, and the fertilizer is applied evenly. Second, do not use pure nitrogen fertilizer as seed fertilizer, such as urea, ammonium bicarbonate. Third, the amount of fertilizer applied to control the species, both prone to burn seedlings administered amount is too large, the other will result in unnecessary waste of fertilizers, generally 15 to 20 kg per acre NPK appropriate. Fourth, the seed fertilizer must be applied separately from the seed, and it should be applied deep. The lateral spacing of the rows of fertilizers and seeds should not be less than 5 cm, and preferably can be applied to the side of the seed row. The fifth is to strictly control the amount of fertilizer applied during sowing. Sixth, in the case of a large amount of seed fertilizer application, it is best to pour a " mengtou water " to play the role of " dilute " the seed fertilizer, which can reduce the burning phenomenon caused by a large number of fertilizers to a certain extent.
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