The role of high potassium fertilizer
1, improve the light efficiency
High potassium fertilizer contains a lot of potassium, which can improve the photosynthetic efficiency of crops, enhance the photosynthetic efficiency of crops and the synthesis of chlorophyll, thus improving the growth rate of crops and increasing the accumulation and transportation of crops' nutrients. In addition, high potassium fertilizer can also provide various enzyme activators for crops, participate in plant physiological metabolism and improve crop yield.
2. Promote the opening of leaf holes
Potassium can promote stomatal opening of leaves, regulate stomatal conductance, increase chlorophyll content of plants, and play a significant role in promoting fruit expansion, coloring and sweetening.
3. Promote dry matter accumulation
Potassium can activate many enzymes in crops, including oxidoreductase, synthetase, transferase and phosphokinase. These all need the assistance of potassium. After these enzymes grow out, the metabolism in crops can be carried out normally, and sugar precipitation, protein precipitation and nucleic acid metabolism will also be accelerated.
High potassium fertilizer has a good effect on fruit swelling and discoloration, so its application time should be chosen from the fruit swelling period to the harvest period, which is the best absorption period of potassium, such as the high potassium fertilizer of Green Boat Guomei, which is mainly characterized by accelerating nutrient transportation and discoloration progress.
4. Improve crop stress resistance.
When the potassium supply is sufficient, the stomata of plants can be adjusted freely with the physiological needs of plants, which can reduce water transpiration and help improve the drought resistance of crops. Potassium has osmotic adjustment function, which can still maintain high water potential and swelling pressure at high temperature, so that crops have high temperature resistance.
Types of high potassium fertilizer
High potassium fertilizer refers to fertilizers with high potassium content, such as potassium chloride, potassium sulfate, potassium dihydrogen phosphate, potassium nitrate and plant ash. Potassium chloride is the fertilizer with the highest potassium content.
The content of potassium in potassium chloride is about 60%, that in potassium sulfate is about 50% ~ 54%, that in potassium dihydrogen phosphate is 28% ~ 29%, and that in plant ash is only 6% ~ 12%.
Matters needing attention in the use of high potassium fertilizer
When using high potassium fertilizer, it should be noted that plant ash is an alkaline fertilizer, and it cannot be mixed with ammonium nitrogen fertilizers such as ammonium sulfate, ammonium bicarbonate and ammonium chloride, or with calcium superphosphate, otherwise it will cause acid reaction, reduce fertilizer efficiency, accelerate the degradation of phosphoric acid and reduce the content of water-soluble phosphorus.