In the past, for a long time, the growers mainly increased the nitrogen, phosphorus and potassium fertilizers to increase the yield of crops, and the application of sulfur fertilizers was far from being taken seriously. In areas of the world where sulfur is reduced to varying degrees, the amount of sulfur applied is exponentially increasing. Applying sulfur fertilizer in a sulfur-deficient area generally increases crop yield by 15% to 20% and improves crop quality. For example, the application of sulfur to tobacco fields not only increases production, but also greatly improves the quality of flue-cured tobacco; after applying sulfur fertilizers such as rapeseed, early rice, pasture, and legume crops, the yield is also significantly increased. Tests show that soybean, peanut, sweet potato and other crops have a significant increase in sulfur application, generally above 10%.
The crop is deficient in sulfur. First, the soil itself is deficient in sulfur. The ratio of nitrogen and sulfur required for normal growth of crops is as large as 14:1. With the large application of nitrogen fertilizer, there will be different degrees of sulfur deficiency. Second, with the increase in multiple cropping indices and yield per unit area, more and more sulfur is removed from the soil. At present, chemical fertilizers are constantly pursuing high concentrations. In particular, most manufacturers use urea instead of ammonium sulfate, ammonium phosphate instead of superphosphate, and potassium chloride instead of potassium sulfate. Fertilizers containing sulfur are decreasing. The third is heavy calcium instead of calcium. In the past, when low concentrations of calcium (superphosphate) were applied, there was no problem of sulfur deficiency in the soil, because the main component in the calcium is monocalcium phosphate and the secondary component is calcium sulfate. Therefore, calcium can not only provide phosphorus nutrition for crops, but also enable crops to obtain sulfur nutrition. In some places, heavy superphosphate is applied all the year round. This fertilizer has been improved in the manufacturing method, so that the fertilizer does not contain impurities such as calcium sulfate, so that the phosphorus content is greatly increased, but there is a problem of sulfur deficiency.
At present, sulfur fertilizers suitable for crop application mainly include sulfur powder, superphosphate, potassium sulfate, ammonium sulfate and gypsum powder. Due to different crop types and soil types, the application amount, application method and fertilization period of sulfur fertilizer are different, and the amount of application is generally more than that of application, point application, etc.; water-soluble fertilizers (such as sulfated sulfur fertilizer) can be used as base fertilizer. Topdressing and seed fertilizer; water-insoluble fertilizers (such as sulfur-based sulfur fertilizer) are generally used as base fertilizer.
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Home AIDS are items we can't live without in our daily lives. They can help us take better care of our health and that of our families. Here are some common home AIDS:
1. Thermometer: A thermometer is a tool used to measure body temperature. It can help us find abnormal conditions in the body, such as fever and so on. There are many types of thermometers on the market, including electronic thermometers, infrared thermometers, etc., which are very convenient to use.
2. Cotton swabs: Cotton swabs are small tools that can be used to clean ears, wipe wounds, and more. When using cotton swabs, be careful not to go too far into the ear canal to avoid damaging your hearing.
3. A pill box: A pill box is a container used to store medicine. It can help us better manage the use of medicine. Pill boxes are generally divided into multi-cell and single cell. Multi-cell pill boxes can store different drugs according to different time periods, while single cell pill boxes are suitable for storing one drug.
4. Non-slip pads: Non-slip pads can help us avoid sliding household furnishings and reduce family accidents. It can be placed under furniture, in the bathroom, etc., and is very easy to use.
In conclusion, home AIDS may seem small, but they play a very important role in daily life, helping us to take better care of our health and that of our families.
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