How to use potash fertilizer for vegetables and fruit trees?

How to use potash fertilizer for vegetables and fruit trees? What is the effect of potassium fertilizer on vegetables? Expert: for example, a few years ago, Tianjin soil Fertilizer Institute conducted potash fertilizer experiments on all kinds of vegetables. the results showed that under the condition of combined application with phosphorus and potassium fertilizer, the vegetable yield was increased by 10% to 20% with the appropriate application of potassium chloride or potassium sulfate. the appearance and color were significantly improved, the contents of vitamins and sugars were significantly increased, and the nitrate content of leafy vegetables decreased significantly. Which is better, potassium chloride or potassium sulfate? Expert: potassium chloride has been applied continuously for 3 years, no adverse effect has been seen, but the effect of potassium sulfate is better. Therefore, it is best to apply potassium sulfate to vegetables, and appropriate amount of potassium chloride can also be applied to Rain Water's more or irrigated vegetables in the open field. Mr. Guo from Qingzhou, Shandong Province is a chemical fertilizer dealer in vegetable producing areas. I want to know how much potash fertilizer is used in vegetables. How should it be used? Expert: the application amount of potash fertilizer for vegetables varies greatly. Generally, on the basis of applying organic fertilizer, potassium sulfate or potassium chloride is applied to 30,80kg per mu. Among them, the greenhouse vegetables are much higher than the open field vegetables; in the fertilization method, the potassium fertilizer of melons and eggplant fruits vegetables is mainly based on base fertilizer, while leafy vegetables and vegetables with shorter growth period are mainly used as base fertilizer. Base fertilizer was applied in combination with soil preparation, and topdressing was applied after topdressing or melting, and then washed with water. Ms. Xie from Baoding, Hebei asked, how to apply potash fertilizer to cucumbers and tomatoes in the greenhouse? Can all potash fertilizer be used as base fertilizer at one time? Experts: generally from the first melon or the first fruit sitting, with nitrogen fertilizer application of potassium fertilizer 4 times 7 times, each mu of potassium sulfate 8 kg 12 kg, of which cucumbers are less than tomatoes. After ditch application, cover the soil or dissolve it and apply it with water. The base fertilizer and topdressing of potassium can not be applied at one time, because the soil can provide sufficient potassium during the whole growth period, and excessive potassium application at one time will hinder the absorption and utilization of calcium, magnesium, ammonium nitrogen and other nutrients. Mr. Liu from Fengcheng, Liaoning asked, how should fruit trees apply potash fertilizer? Expert: this is a big problem. We can only talk about it in principle. Most fruit trees apply 20kg of potassium sulfate or potassium chloride per mu, the higher the fruit yield, the greater the application; the southern and coastal areas are deficient in potassium and the application rate is higher than that in other areas. The application time is generally divided into three times, the amount of application is the most in the fruit expansion period from May to June, followed by the application of base fertilizer in autumn, less from February to April before germination or flowering, and the late-maturing varieties should be applied again in July and August. The method of fertilization is to dig 4 or 6 trenches or pits more than 30 centimeters deep along the crown dripping line and cover the soil with organic fertilizer or nitrogen and phosphorus fertilizer. Ms. Liao from Shaoguan, Guangdong asked, what is the special significance of applying potash fertilizer to citrus? expert: potash fertilizer has the same effect on citrus as ordinary fruit trees, which can increase yield and improve quality. The difference lies in: 1. Citrus needs a large amount of fertilizer, which is 1-2 times higher than that of ordinary deciduous fruit trees. Citrus planting areas are mostly acidic soil, generally lack of potassium; 3. In recent years, low temperature disasters of ice and snow have occurred many times in citrus producing areas. Potassium application is beneficial to cold resistance and improve the storage resistance of fruits. Mr. Gu from Changzhi, Shanxi asked, can ternary compound fertilizer be used instead of potash fertilizer on fruit trees? expert: of course, based on the amount of fertilizer applied per plant, it is recommended to apply 1.5 kg of general compound fertilizer in autumn, 1 kg to 1.5 kg of high nitrogen and phosphorus compound fertilizer before germination or flowering, and about 2 kg of high nitrogen and potassium compound fertilizer during fruit expansion. Mr. Yu from Baoji, Shaanxi Province, asked, is there any relationship between calcium deficiency and fertilization in apples? Expert: it does. For example, excessive use of potassium fertilizer, persistent soil drought or stagnant water will affect the absorption and utilization of soil calcium by roots; long-term absence of organic fertilizer, calcium phosphate and other calcium fertilizers will also cause potassium deficiency in fruit trees. In order to prevent and cure calcium deficiency in apples, in addition to applying calcium-containing fertilizer, 0.3% 0.5% amino acid calcium can also be sprayed several times from full flowering to bagging. Click to get more fruit tree planting technology click to get more vegetable planting technology click to get more nitrogen, phosphorus, potassium fertilizer application technology click to get more fertilizer application technology