If the crop lacks potassium fertilizer, it will get "chondrosis", which is easy to fall down. It is often called "quality element" by potassium bacteria. Its main effects on the quality of crop products are: 1 can promote the better use of nitrogen by crops, increase the protein content, and promote the production of sugar and starch; 2 increase the shape of nucleolus, seeds, fruits and tubers, roots, shape 3 and improve the oil content of oil crops, increase the content of vitamin C in fruits; 4 accelerate the maturity of fruits, vegetables and other crops, so that the maturity period tends to be consistent; 5 enhance the ability of products to resist bruises and natural decay, prolong Storage and transportation period; 6 increase the strength, length and fineness of cotton and hemp crop fibers, and the purity of color.
Potassium can improve the stress resistance of crops, such as drought resistance, cold resistance, lodging resistance, and resistance to pests and diseases.
The harmful effects of excessive application of potassium fertilizer:
Excessive application of potassium not only wastes valuable resources, but also causes the absorption of calcium, magnesium and other cations in crops to decrease, resulting in leafy vegetables such as “rotation” and apple “bitter disease”.
Excessive application of potassium fertilizer can cause soil environmental pollution and water pollution;
Excessive application of potash will weaken crop production capacity.
Potassium application can promote photosynthesis of crops, promote crop results and improve the cold resistance and disease resistance of crops, thereby increasing agricultural yield. Potassium is present in plants as free potassium ions, which promotes the metabolism of carbohydrates and nitrogen; controls and regulates the activity of various mineral nutrients; activates the activities of various enzymes; controls the transport of nutrients and water; Internal pressure to prevent plants from withering. 
Promoting enzyme activation The activation of enzymes is one of the most important functions of potassium in plant growth. Potassium is now found to be an activator of more than 60 enzymes. therefore. Potassium is closely related to many metabolic processes in plants, such as photosynthesis, respiration, and synthesis of carbohydrates, fats, and proteins.
Promote the transportation of photosynthesis and photosynthetic products 1 Improve photosynthetic efficiency; 2 Adjust the opening and closing of pores, control the ingress and egress of CO2 and water; 3 Promote the synthesis of carbohydrates and accelerate the flow of photosynthetic products.
Promote protein synthesis 1 Promote the uptake and function of NO3, a key component of protein synthesis; 2 It is closely related to the process of protein synthesis.
Enhancing the plant's stress-resistant potassium can reduce the soluble amino acids and monosaccharides in the crop, increase the cellulose, and thicken the cell wall; potassium can accumulate in the roots of the crop to produce an osmotic pressure gradient to enhance water absorption; potassium can make crop leaves in drought and water shortage The stomata are closed to prevent loss of water. Therefore, potassium can enhance the disease resistance, cold resistance, drought resistance, lodging resistance and salt tolerance of crops.
Improve crop product quality, increase protein content of food crops, crude fat and palmitic acid content of oil crops, starch and sugar content of potato and sugar crops; increase fiber length, strength and fineness of fiber crops and cotton; adjust sugar of fruits The acid ratio increases the content of vitamin C; improves the shape, size, color and flavor of the fruit, and enhances its storability.