Applying phosphate fertilizer to crops that are most sensitive to phosphorus reaction, such as beans, rapeseed, wheat, cotton, potato, and melon, can be used to obtain high economic benefits.
After the application of phosphate fertilizer, the seasonal crop can only use a small part of it, and the aftereffect can last for several years. Therefore, in the years after the application of phosphate fertilizer, it is not necessary to apply it every year to avoid waste.
Early application of crops in the seedling stage to absorb phosphorus is the fastest, to absorb half of total phosphorus in the growing season, if the phosphorus deficiency in the seedling stage, will affect the later growth, even if the late re-application is difficult to recover the loss of early phosphorus deficiency, so seedling period Can not lack phosphorus.
Fine application of superphosphate is easy to absorb moisture and agglomerate during storage. When applied, it is broken and sieved to facilitate root absorption.
Concentrated phosphorus is easily fixed by the fixation of iron, aluminum, calcium and other elements in the soil. Therefore, the application should be carried out at a point and the application of phosphorus should be carried out around the seeds and roots. This can avoid the fixation of iron, aluminum, calcium and other elements in the surrounding soil, and is beneficial to root absorption.
Mixed with organic fertilizers Phosphate fertilizers, especially calcium, magnesium and phosphorus fertilizers, can be combined with organic fertilizers to convert the poorly soluble phosphorus in phosphate fertilizers into effective phosphorus that is easily absorbed by crops.
The layered application of phosphate fertilizer has little mobility in the soil, and where it is applied is basically where it does not move. Therefore, phosphate fertilizer should be applied in both the deep and shallow layers. Applying the phosphate fertilizer to the shallow layer is conducive to the absorption of the seedlings, so that the crops turn back early and the tillers are fast. Generally, 20-40 kg of phosphate fertilizer per hectare, 1/3 of shallow layer and 2/3 of deep layer.
Mixed with nitrogen fertilizer The crops absorb a certain proportion of nutrients, and if the ratio is out of balance, it will not grow well. Single application of nitrogen fertilizer, root system is not well developed, easy to fall, and vulnerable to pests and diseases, and accelerate the excessive decomposition of nitrogen in the soil, causing imbalance of nitrogen and phosphorus. The combination of nitrogen and phosphorus can balance nutrients and promote root growth, laying a foundation for high yield.
When the crops are sprayed outside the roots, the roots are gradually aging, and the ability to absorb nutrients is weakened, often resulting in phosphorus deficiency. At this time, the water-soluble calcium superphosphate can be sprayed onto the crop leaves to allow the phosphorus to enter the plant through the pores or stratum corneum of the foliage. For cereal crops, 1%-3% of phosphate fertilizer can be used, and vegetables can use 1% phosphate fertilizer. Spray on a sunny morning or evening.
Application in phosphorus-deficient soils The application of phosphate fertilizers in red soil dry fields, yellow mud fields, duck hoe fields, and cold-soaked fields has increased significantly. Fertilizer fields, loam soils, and fields in which large amounts of phosphate fertilizer have been continuously applied in previous years may be appropriately applied.
After the application of phosphate fertilizer, the seasonal crop can only use a small part of it, and the aftereffect can last for several years. Therefore, in the years after the application of phosphate fertilizer, it is not necessary to apply it every year to avoid waste.
Early application of crops in the seedling stage to absorb phosphorus is the fastest, to absorb half of total phosphorus in the growing season, if the phosphorus deficiency in the seedling stage, will affect the later growth, even if the late re-application is difficult to recover the loss of early phosphorus deficiency, so seedling period Can not lack phosphorus.
Fine application of superphosphate is easy to absorb moisture and agglomerate during storage. When applied, it is broken and sieved to facilitate root absorption.
Concentrated phosphorus is easily fixed by the fixation of iron, aluminum, calcium and other elements in the soil. Therefore, the application should be carried out at a point and the application of phosphorus should be carried out around the seeds and roots. This can avoid the fixation of iron, aluminum, calcium and other elements in the surrounding soil, and is beneficial to root absorption.
Mixed with organic fertilizers Phosphate fertilizers, especially calcium, magnesium and phosphorus fertilizers, can be combined with organic fertilizers to convert the poorly soluble phosphorus in phosphate fertilizers into effective phosphorus that is easily absorbed by crops.
The layered application of phosphate fertilizer has little mobility in the soil, and where it is applied is basically where it does not move. Therefore, phosphate fertilizer should be applied in both the deep and shallow layers. Applying the phosphate fertilizer to the shallow layer is conducive to the absorption of the seedlings, so that the crops turn back early and the tillers are fast. Generally, 20-40 kg of phosphate fertilizer per hectare, 1/3 of shallow layer and 2/3 of deep layer.
Mixed with nitrogen fertilizer The crops absorb a certain proportion of nutrients, and if the ratio is out of balance, it will not grow well. Single application of nitrogen fertilizer, root system is not well developed, easy to fall, and vulnerable to pests and diseases, and accelerate the excessive decomposition of nitrogen in the soil, causing imbalance of nitrogen and phosphorus. The combination of nitrogen and phosphorus can balance nutrients and promote root growth, laying a foundation for high yield.
When the crops are sprayed outside the roots, the roots are gradually aging, and the ability to absorb nutrients is weakened, often resulting in phosphorus deficiency. At this time, the water-soluble calcium superphosphate can be sprayed onto the crop leaves to allow the phosphorus to enter the plant through the pores or stratum corneum of the foliage. For cereal crops, 1%-3% of phosphate fertilizer can be used, and vegetables can use 1% phosphate fertilizer. Spray on a sunny morning or evening.
Application in phosphorus-deficient soils The application of phosphate fertilizers in red soil dry fields, yellow mud fields, duck hoe fields, and cold-soaked fields has increased significantly. Fertilizer fields, loam soils, and fields in which large amounts of phosphate fertilizer have been continuously applied in previous years may be appropriately applied.
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