1. Banana

The nutritional content of bananas is very high, and the potassium content is very high.

High potassium: Bananas are also particularly high in potassium. The potassium content per100g of fruit is about 330mg for bananas, but lower for other fruits, such as119mg for apples, 92mg for pears, 0/66mg for peaches, 0/04mg for grapes and 87mg for watermelons.

2. Longan

Longan is a high-calorie food in fruits, with high carbohydrate content and potassium content, and vitamin C content is equivalent to that of oranges.

Longan contains a variety of nutrients, which have the effects of nourishing blood, calming the nerves, strengthening the brain, improving intelligence and nourishing the heart and spleen; The inhibition rate of longan on uterine cancer cells is over 90%, and women's menopause is the stage of gynecological tumors, so eating longan properly is beneficial to health; Longan has a tonic effect, and it has an auxiliary effect on people who need to recuperate after illness and are weak.

3.mango

From the point of view of traditional Chinese medicine, mango is sweet and slightly sour, which has the effects of promoting fluid production, quenching thirst, diuresis and stopping vomiting, and can be said to be the most natural prescription for treating carsickness. From the point of view of modern nutrition, mango is rich in vitamins A, C, carotene, potassium, crude fiber, etc. The content of vitamin A is one of the highest among all fruits, and vitamin C is twice that of bananas and pineapples. Vitamins A and C are important antioxidant nutrients.

Vegetables with high potassium content:

1. kelp per100g of dried kelp contains 4.36g of potassium, 2.25g of calcium, 0.2 1 g of phosphorus, 0.15g of iron, 0.34g of iodine, and strontium, titanium, vanadium, manganese, zinc and so on.

Kelp contains iodine and iodide, which can prevent and treat iodine-deficient goiter; Kelp amino acid and potassium salt have antihypertensive effect; Alginic acid and laminin can reduce serum cholesterol; Hot water extract has obvious cytotoxic effect on human KB cancer cells in vitro, has obvious inhibitory effect on S 180 tumor, and can improve the body's humoral immunity and promote the body's cellular immunity. Laminaria polysaccharide can prevent and treat hyperglycemia.

2. laver

The content of potassium in seaweed ranks first among all kinds of fruits and vegetables, and its sodium content is also very rich, especially in laver, where the potassium content per 100 grams reaches 1640 mg. In the human body, potassium usually works with sodium to maintain the normal activity of muscles, adjust the osmotic pressure and water balance inside and outside cells, and prevent excessive loss of body fluids.

You can eat more seaweed in summer, which can supplement potassium well.

3. Spinach

Spinach has a moderate nutritional value, but it has a balanced nutritional content and is rich in trace elements such as potassium, which has a good therapeutic effect. Eating spinach regularly has the effects of relaxing bowels, clearing away heat, regulating qi and enriching blood, preventing diseases and resisting aging, etc. It can play an auxiliary role in treating anemia, diabetes, tuberculosis, hypertension, wind-fire red eye and many other diseases.

Extended data:

Potassium is rich in dairy products, fruits, vegetables, lean meat, viscera, bananas and raisins.

main application

human body

Potassium can regulate the appropriate osmotic pressure in cells and the acid-base balance of body fluids, and participate in the metabolism of intracellular sugar and protein. It is helpful to maintain nerve health and normal heartbeat, prevent stroke and assist normal muscle contraction. Potassium has the effect of lowering blood pressure when high sodium intake leads to hypertension.

1. Participate in sugar, protein and energy metabolism: When glycogen is synthesized, potassium needs to enter the cell together with it, and when glycogen is decomposed, potassium is released from the cell. When protein is synthesized, it needs about 3mmol of potassium per gram of nitrogen, and when it is decomposed, it releases potassium. Potassium is also needed for ATP formation.

2. Participate in maintaining the osmotic pressure and acid-base balance of intracellular and extracellular fluids: Potassium is the main cation in cells, so it can maintain the osmotic pressure of intracellular fluid. In acidosis, blood potassium tends to increase at the same time due to the decrease of potassium excretion from the kidney and the migration of potassium from the inside to the outside of the cell, while in alkalosis, the opposite is true.

3. Maintain neuromuscular excitability.

4. Maintaining myocardial function: One of the main driving forces for the potential change of myocardial cell membrane is the intracellular and extracellular transfer of potassium ions.

Potassium deficiency can cause irregular and accelerated heartbeat, abnormal electrocardiogram, muscle weakness and irritability, and finally lead to cardiac arrest. Generally speaking, healthy people will automatically excrete excess potassium. But patients with kidney disease should pay special attention to avoid taking too much potassium.

The main symptoms of potassium deficiency in human body are tachycardia and arrhythmia, muscle weakness, numbness, irritability, nausea, vomiting, diarrhea, hypotension, insanity and psychological apathy.

plant

Potassium can promote plant stem health, improve fruit quality, enhance plant cold resistance, and increase the content of sugar and vitamin C in fruit. Like nitrogen and phosphorus, potassium deficiency symptoms first appear in old leaves. When potassium supply is insufficient, carbohydrate metabolism is disturbed, photosynthesis is inhibited, and respiration is enhanced.

Therefore, when potassium is deficient, the plant's stress resistance is weakened, and it is easy to be attacked by diseases, and the fruit quality is reduced and the coloring is poor. The demand for potassium fertilizer for melons, fruits and tomatoes is mainly in the period of rapid fruit expansion.

Generally, potassium fertilizer is applied during basal dressing, rush dressing, topdressing, spraying and vegetative cultivation, and at the early stage of fruit expansion, rush dressing, topdressing or foliar spraying with 0.5% potassium dihydrogen phosphate, potassium nitrate, potassium sulfate and potassium chloride solution. Potassium chloride cannot be used in melons and tobacco leaves.

When potassium is insufficient, the stems of plants are weak and prone to lodging, and the cold resistance and drought resistance are poor; The leaves turn yellow and gradually become necrotic. Because potassium can move to young leaves, potassium deficiency begins in older leaves, and later develops to the base of the plant, and there are also withered leaves, curved leaves or shriveled leaves.

1. Promote enzyme activation. There are more than 60 kinds of enzymes in organisms that need potassium ions as activators.

Promote the utilization of light energy and enhance photosynthesis. First of all, K+ can maintain the normal structure of thylakoid membrane in chloroplast, and when K+ is absent, the thylakoid membrane structure is loose, which affects the normal photosynthesis. At the same time, it can promote the formation of proton gradient and photophosphorylation on thylakoid membrane.

3. It is beneficial to the normal respiration of plants and improves energy metabolism.

4. Enhance the synthesis and transport of substances in plants. For example, the synthesis and operation of carbohydrates; Enhance the synthesis of protein and nucleoprotein; Promote the nitrogen fixation of leguminous rhizobia.

5. Enhance the resistance of plants.

6. Enhance the ability of frost resistance, drought resistance and salt resistance;

7. Enhance the resistance of plants to pests and diseases. The results showed that the application of appropriate amount of potassium fertilizer could effectively reduce the flax leaf spot, rice blast and sheath blight of rice. Powdery mildew, scab and rust of wheat, etc.

8. Reduce the harm of reducing substances to rice.

Baidu Encyclopedia: Potassium