First, how to use potash fertilizer is the best.
1, depending on soil application
(1) In order to achieve the best fertilizer efficiency of potassium fertilizer, it is generally necessary to give priority to the application of potassium fertilizer in plots with serious potassium deficiency.
(2) Because the content of available potassium in sandy soil is generally low, it is necessary to apply more potassium fertilizer reasonably, while the content of available potassium in sandy soil is generally high, so it is necessary to choose less or no application according to the specific situation.
2, according to the crop application
(1) There are many kinds of potash fertilizer, and each crop has different adaptability to all kinds of potash fertilizer. It is necessary to apply potash fertilizer according to crop types to ensure the full play of fertilizer efficiency.
(3) Potassium sulfate can generally be applied to tobacco, fruit trees and sugar crops, and potassium chloride can generally be applied to field crops.
3. Preventive measures
(1) Except for chlorine-free crops, potassium chloride can be basically used in most plots with high rainfall, convenient irrigation and good drainage conditions.
(2) In order to ensure the application effect of potassium fertilizer, it is generally used as base fertilizer and early topdressing.
2. What kinds of potash fertilizer are there?
1, potassium chloride
(1) Potassium chloride is a kind of quick-acting potassium fertilizer, which can be generally used for field crops such as rice, wheat, cotton, corn and sorghum. , and can supplement the potassium needed for crop growth.
(2) Because potassium chloride has strong solubility, it can be used in places with more rain, and it should be used with caution or not in dry and water-deficient plots.
2. Potassium sulfate
(1) Generally, potassium sulfate can be used for cash crops sensitive to chlorine, such as sulfur and potassium. Generally, it can be used for chlorine-free crops such as tobacco, tea trees, grapes, sugar cane, sugar beet, watermelon, etc., which can usually improve the quality of crops.
(2) In calcareous soil, sulfate radical and calcium ion in the soil will generate insoluble calcium sulfate, and excessive calcium sulfate will cause soil hardening, so it is necessary to reasonably increase the application amount of farm manure.
3. Potassium nitrate
(1) Potassium nitrate is a kind of chlorine-free nitrogen-potassium compound fertilizer, which can generally be used for chlorine-sensitive crops such as strawberries, beans, Chinese cabbage, lettuce, peanuts and carrots.
(2) Nitrate nitrogen and potassium contained in potassium nitrate are both essential elements for crop growth, and can generally be used as topdressing.
4. Potassium dihydrogen phosphate
(1) monopotassium phosphate is an efficient compound fertilizer of phosphorus and potassium, which is an ideal new fertilizer for flue-cured tobacco. Because flue-cured tobacco has a great demand for phosphorus and potassium, monopotassium phosphate contains about 34% potassium oxide and 52% phosphorus pentoxide, which can usually supplement the required phosphorus and potassium.
(2) Potassium dihydrogen phosphate can be used not only as base fertilizer, topdressing and foliar fertilizer, but also for soaking and dressing seeds, with various application methods.
5. Potassium humate
Potassium humate (1) is a slow-acting organic solid potassium fertilizer with strong adsorption, complexation and chelation.
(2) Applying potassium humate can not only supplement potassium to the soil, but also reduce the fixed amount and loss of potassium in the soil and improve the absorption and utilization rate of potassium by crops.