Foliar fertilizer has attracted the attention of farmers because of its flexibility in usage, time use, high utilization rate and quick effect.Potassium dihydrogen phosphate is a high concentration of high quality chlorine-free phosphate potassium fertilizer, with very low salt value and high nutrient content, suitable for use in a variety of crops.It can not only promote fruit expansion, color change and crop metabolism, but also improve the ability of rooting, freezing resistance and resistance.
Potassium dihydrogen phosphate has been widely used and is a physiological neutral fertilizer with good water solubility. It is the first choice of foliar potassium fertilizer because it contains 52% phosphorus (P2O5), 34% potassium (K2O) and over 80% utilization rate.
It contains two key elements, phosphorus and potassium
As a "production worker", phosphorus can root, promote flower bud differentiation and provide energy for fruit expansion.
Potassium, as a "carrier", can slow down the aging process, improve photosynthesis, promote the absorption of nitrogen, make crops mature early, increase the sugar and water content of fruits, and enhance the ability to resist diseases and drought.
And then improve the overall fruit yield, quality and commodity.
One of the reasons foliar potash spraying has been neglected is that it is assumed that potash or potash-containing compounds have been applied to the soil and that there is no need to carry the coals to the chase.
In fact, in the later period of crop growth, the use of potash, make up because of the decline of the root cause of ageing fat absorption ability, and the change of soil ph and other reasons resulting in the loss of potash or curing, eventually led to the "haven't k a k is equal to", so do not only not doing this, but have the effect of four two dial one thousand jins.
Be sure to pay attention to this when used correctly
1. Foliar spraying is mainly used.The spraying concentration was 0.5% ~ 1%, and the spraying time was 2-3 times with an interval of 5-7 days.High concentration of potassium dihydrogen phosphate use, must avoid high temperature time, generally high temperature season is not recommended to use high concentration.
2. The best spraying period: choose the critical period or peak period for the absorption of phosphorus and potassium by crops, with the best effect.
3. Spraying method: spray mainly on the back of the leaves, especially on the leaves near the fruit, with uniform spraying as the standard.
4. Mixed situation: potassium dihydrogen phosphate can not only be mixed with other trace element fertilizers or bactericidal insecticides, but also can play a synergistic role. The pH of 0.5%~1% potassium dihydrogen phosphate solution is between 4.6 and 6, without causing the so-called precipitation.
Mix match exquisite advocate 3 prohibit 3
An advocate
Potassium dihydrogen phosphate and some nitrogen fertilizers, microfertilizers and pesticides are mixed in a reasonable way, which can save labor and increase fertility and efficacy.
Mixed application is carried out in fields with poor crop growth and lack of nitrogen, phosphorus and potassium. Generally, the appropriate concentration of urea solution is required to be 1% ~ 2%.
The advocate
Potassium dihydrogen phosphate was mixed with boron fertilizer.In boron deficient and boron effective crops, potassium dihydrogen phosphate was mixed with boron fertilizer to increase yield significantly. The concentration of boron fertilizer was 0.05%~0.1%.
Three advocate
Potassium dihydrogen phosphate can be mixed with trichlorfon, phoxim and pyrethroids.In addition, it can be mixed with some growth hormones, such as naphthylacetic acid and chlorpromazine.
A ban on
The product itself is alkaline should not be mixed with potassium dihydrogen phosphate, such as bordeaux liquor, copper hydroxide, potassium hydroxide.
Potassium dihydrogen phosphate has a PH of about 6.6, which is slightly acidic. When mixed with alkaline fertilizers and pesticides, chemical reactions will occur, causing flocculation, precipitation, discoloration, heat, bubbles and other abnormal phenomena. At this time, the function of potassium dihydrogen phosphate will fail.
The ban
Products containing carbonate (CO3-) should not be mixed with potassium dihydrogen phosphate.Because the carbonate reacts with the hydrogen ion of potassium dihydrogen phosphate to produce CO2 gas.Potassium carbonate, sodium bicarbonate, etc.
Three prohibited
Products that react with phosphate should not be mixed with potassium dihydrogen phosphate.
This product reacts with phosphate ions to form flocculation and precipitation, such as calcium, magnesium and zinc products.Mancozeb, antivenom alum, mancozeb in pesticide can not be mixed with potassium dihydrogen phosphate.
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