Phosphorus fertilizers are classified according to their solubility, namely: water-soluble, weak acid-soluble and insoluble.
Application Technique Key Song
Water-soluble phosphate fertilizer
Water-soluble phosphate fertilizers are loved by everyone, and they are easily soluble in water and fertilizers.
There are two main varieties, superphosphate and heavy calcium;
They are all acidic and sensitive to alkali.
Stores and transports do not suffer dampness, prevent the phosphorus from becoming invalid.
Superphosphate
Superphosphate water is soluble, and all kinds of crops are suitable.
The mixed manure is applied in layers to reduce the soil and fix it;
In combination with ammonium urea sulphate, phosphorus increases nitrogen production,
Phosphorus is acidic in the eighteenth, storage and storage application of Mo met alkali.
Heavy calcium phosphate
The name of superphosphate is aggravated and it is also afraid of iron and aluminum to fix it.
Phosphorus up to forty-six, common weight calcium is acidic;
The amount of use should be flexible, it is the same with the use of calcium,
As the phosphorus content is relatively high, it is not appropriate to plant seedling roots.
Weak acid-soluble phosphate fertilizer
Phosphorus-soluble fertilizer is insoluble in water and can only be dissolved in acid. Crop roots secrete acid and dissolve phosphate fertilizer is an instinct.
The key to stacking before use, fertilizer effect is slow and long, is not fixed, only because of calcium and magnesium, acidic soil more adapted.
Calcium magnesium phosphate fertilizer
The calcium magnesium phosphate fertilizer is alkaline, acidic soil is most suitable,
Phosphorus 18 water insoluble, mixed y fertilizer increase effect;
Because it contains calcium, magnesium, manganese, silicon and copper,
Used for rapeseed, silkworm peas, and fruit trees.
Steel slag phosphate
Steel slag Phosphate fertilizer slag, acidic soil like it,
The gray powder contains low phosphorus content and is suitable for use as a base fertilizer;
Before the use of the best stacking, phosphorus utilization rate can be improved,
Do not mix ammonium nitrogen for rice production.
Defluorinated phosphate fertilizer
Defluorinated phosphate fertilizer contains less fluorine and can be fed to feed for livestock.
Light gray brown fine powder, high efficiency in mixing manure;
Not easy to agglomerate weak acid solution, phosphorus containing 20 alkali reaction,
With more calcium and lead-free arsenic, the most suitable soil is acidic.
Insoluble phosphate fertilizer
Insoluble phosphate fertilizer is difficult to dissolve, insoluble water to slightly dissolve acid,
To achieve good fertilizer effect, scientific fertilization is the key;
Emphasizing stacking before use, together with nitrogen physiological acid,
The lack of phosphoric acid should be applied uniformly as base fertilizer.
Phosphorite powder
Phosphorite powder, insoluble, ground with phosphate rock,
Gray brown powder does not agglomerate and is not corrosively stable;
Chemical properties of slightly alkaline, general total phosphorus over thirteen,
Acidic low-phosphorus, adapt to Leguminosae.
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