How Field Crops Can Rationally Apply Potash Fertilizer
Q: Which field crops require potassium fertilizer? Is there no need to use potassium fertilizer? A: Potassium is an essential nutrient for plants. Every crop is needed, but as a fertilizer, it is used only when it is deficient. Whether it is applied or not, it depends mainly on crop needs and soil fertility characteristics. In general, food crops such as corn and soybeans, potato crops such as sweet potato and potato, fiber crops such as cotton and hemp, and sugar crops such as sugar beet and sugar cane need potassium fertilizer more than ordinary field crops; soils in southern red soil and coastal rainy areas are more soils. Potassium is more needed in the soils in the north and northwest regions; soil and crops that are not applied or organic fertilizers for a long time are particularly needed. In short, most crops or soils require the application of potash, and there is no need to apply a few. However, due to the lack of potassium resources, organic fertilizers should be fully developed and utilized. On this basis, limited potassium fertilizers should be given priority to crops or soils that need potassium fertilizers most. Q: How much potash fertilizer is suitable for field crops? A: The amount of potash fertilizer should be applied depends mainly on the characteristics of the crop's requirement fertilizer, yield level, and soil potassium supply level. In general, potassium fertilizer (K2O) per acre is approximately 4-8 kg in the south and southeast coastal areas; Huanghuaihai area is approximately It is 3 to 7 kg; in the northeast it is about 2 to 5 kg; in the northwest it is about 0 to 4 kg. The fertilizer application amount is obtained by dividing the nutrient application amount by the nutrient content of the fertilizer. For example, a sorghum in the northeast region needs 4 kg of potassium per kilogram (K2O), and replacing it with potassium chloride (60% of potassium) is: 40.60 = 6.7 (kilograms). Of course, if more accurate quantification is to be achieved, it is also necessary to resort to soil testing and formula fertilization. Q: When should potash for field crops be applied? How to apply? A: The growing period of field crops is short, and it is more difficult to topdress the potash fertilizer in the later period. Therefore, when potash fertilizer is combined with soil preparation, potassium fertilizer is applied to the soil. For rice, about 1/3 of the potassium fertilizer can also be left at jointing and booting stage. Q: Can potassium be sprinkled on the ground during jointing of corn and rush to the soil when it is raining? A: No. We have done experiments. After wheat heading, sprinkle urea, diammonium, and potassium chloride between the rows, and then perform sprinkler irrigation. The results show that most of the nitrogen that is eluted into the soil is potassium, which accounts for a small part, and phosphorus is almost Not leached. Therefore, after applying P and K fertilizers or compound fertilizers containing P and K, it is necessary to deeply cover the soil. Fire Alarm Type,Fire Alarm Product,Smoke Alarm,Fire Alarm System Guangdong Isafenest Co.,Ltd. , https://www.isfenest.com