 南通盛丰化工有限公司 |
Potassium phosphiteCharacteristics of potassium phosphite The content of potassium dihydrogen phosphate potassium in potash in all the highest, almost with potassium chloride, two at the same concentration, the former was 56%, which was 60%, two people close to the content of potassium. Potassium chloride: K2O 60%: K2O 50-52%; potassium sulfate; potassium dihydrogen phosphate: K2O 21%, NPK fertilizer NPK by about 10%. Potassium phosphite as a fertilizer combined with classic products, can greatly reduce the use of pesticides, its own without any residue, environmentally friendly. The disease resistance of potassium phosphite is an acquired systemic resistance, also known as induced systemic resistance, which belongs to a kind of generalized biological control. A number of studies have demonstrated that potassium phosphite for downy mildew, downy blight, caused by oomycetes Pythium damage prevention are recognized, many researchers found that comprehensive test potassium phosphite, the flower of Gerbera lily, orchid, orchid, orchid, tiger Wen Xinlan, kumquat, fruit of citrus, papaya, avocado, seedling blight, downy mildew of grape presbyopia, litchi fruit blight, the vegetables pepper, sweet pepper and tomato and potato late blight, lettuce and cruciferous downy mildew and rot prevention is Anoectochilus seedling effect. Two. Application scheme of potassium phosphite Potassium phosphite is not only a phosphorus and potassium fertilizer of 3+ phosphorus, but also a kind of internal bactericidal agent. Repeated use will not produce resistance. That is a kind of fungicide, is also a kind of foliar fertilizer. 1, the role of potassium phosphite Regulation of stomatal closure in plants. The promotion of new shoots of mature fruit and turn green. (3) potassium phosphite has the ability of internal absorption (which can be transmitted up and down in plants). It has the function of protection, treatment and eradication, and can be mixed with other compounds (including copper agent). 4. Application of root can release calcium, zinc, iron and other elements in the soil, loosen soil, increase permeability, improve the rhizosphere environment, which is conducive to the healthy and healthy growth of crops; The use of potassium phosphite can promote plant robustness, effectively control the apical advantage, avoid excessive vegetative growth, make the flower buds plump, flower spend more strong, fruit set rate and quality significantly improved; The rich in biological stimulation at phosphate application, can stimulate the crops to produce polyphenols and reactive oxygen species (ROS), stimulate the defensive enzyme system, the common blight, downy mildew, root rot, late blight and other fungal and viral diseases have a good effect of prevention and treatment, regular use, crop disease resistance the inverse ability is greatly improved. 2. Mechanism of action of potassium phosphite (1) direct attacking pathogens and inducing crops to produce toxic substances (PA) to pathogens (2) it can induce the disease resistance signal of crops, transmit to other cells that haven't been attacked, and start the defense system (3) induced cells produce lignin and increase cell wall thickness. 3, potassium phosphite mixed safety (1) potassium phosphite mixed well, can be used together with copper agent, will not produce precipitation and phytotoxicity; The potassium dihydrogen phosphate and trace elements in common fertilizer (sugar alcohol, calcium nitrate) arbitrary mix, easy to use; The potassium phosphite can accelerate the aging of new shoots, in spring shoots and fruit period of drug safety, will not cause injury to the young fruit. (4) the effect of potassium phosphite on prevention of ulcer disease is remarkable, and the prevention effect of singles is obvious. If the ulcer disease broke out seriously, it should be used together with copper agent. 4, the use of methods and instructions Potassium phosphite is widely used in eggplants, rhizomes, leafy vegetables, melons and fruits, cereals and oils and other crops; (2) applying 50% liquid 3000ml per mu per mu; Drip irrigation, sprinkling irrigation and sprinkling roots each time 50% liquid 1000-2000ml per mu;Treatment of disease, diluted 200-300 times irrigation root; Foliar application diluted 600-1000 times 5, the specific use of methods introduced When using impregnation method Naked root seedlings, such as strawberries, can be dipped in potassium phosphite solution before planting, which can promote the initial growth of crops, which is the most critical growth period of crops. The crop should be soaked for 15-20 minutes to allow the solution to reach the leaf center of the crop. Recommended dilution for 0.5% solution use. The use of spray way A, fruit trees: spraying 2-3 times, from flowering to the beginning of fruit, every 7-10 days interval use, the amount of 2-2.5 liters / ha, that is, per mu of 130-170 ml 50% potassium phosphite solution. Special recommendation: when the buds particularly weak, environment is unfavorable, spraying potassium dihydrogen phosphate solution, and then spraying common leaf fertilizer. B, citrus fruit, spraying 3 times, respectively in spring summer and autumn, every time dosage of 1.5-2.0 L / ha. C, potato (potato): spray 3-4 times, starting from the tuber, once every 10 days, the amount of 3-4 liters / ha. D, grapes: spray 3-4 times, from the first flowering to knot string, once a week, each time the amount of 3 liters / ha. E, strawberry: spray 3-4 times, from the early flowering to the first fruit, the amount of 3 liters / ha; autumn spraying should be diluted 1000 times 50% times potassium phosphate solution, diluted after the amount of 12-15 liters / ha. F, tomato: spray several times before setting fruit, the amount is 3 liters / ha. G, cucumber: spraying 4-5 times, after planting began to use 5 liters / ha, 1 times per 2 weeks, 3 liters / ha. Adopts the way of irrigation A, general crops: the whole growth period, especially adversity period, applied potassium phosphite 1 times a week, the amount of 6-10 liters / ha. B, strawberry: a total of 4 times, from planting to the first results period, the amount of 8-10 liters. C, soil culture flowers (such as chrysanthemum): a total of 2-3 times, from the beginning of planting, once a week, the amount of 10 liters / ha. D, crops grown in organic substrates (e.g. roses, potted plants): 10 kg / ha, 1 times a week, in the whole growth period, especially during adversity. E, planted in rock wool vegetable crops (soilless cultivation Vegetables): a total of 2 times, immediately after planting, second times is the beginning of fruit, the amount of 3-5 liters / ha, 1000 liters of water per 3-5 liters, irrigation. Nowadays, potassium phosphite has been widely used in North America, Brazil, Israel, Southeast Asia, Taiwan and some European countries, and has achieved very good results. Especially in the green pollution-free vegetables, fruits and high-end ornamental economic crops, potassium phosphite is welcomed by the majority of farmers.
Article classification:
Product knowledge
|