How can potash fertilizer in field crops be reasonably applied. Compared with fruit trees and vegetables, what are the characteristics of potassium fertilizer application in field crops? Experts: The application of potash fertilizer to field crops has two main characteristics: First, the growing period of field crops is shorter, and all or most of potash fertilizer is used as base fertilizer, and a small part is used as seed fertilizer or top dressing; second, most field crops are not applied or only a small amount is applied. Organic fertilizers are therefore more dependent on potassium fertilizers. How to apply potassium to corn? Ms. Zhang of Jilin Gongzhuling and Mr. Liang of Hebei He asked how potassium should be applied to corn. Expert: Ms. Zhang is planting spring corn, generally 6 to 10 kg of Mushi potassium chloride, combined with soil and nitrogen fertilizer before the spring sowing as basal fertilizer applied, if there is a reduction of straw potassium fertilizer can be appropriately reduced, taking the lower limit of the recommended amount Mr. Liang is planting summer corn, and Mushi potassium chloride is recommended to be 6-10 kg. What is different is that when the summer corn is planted, it is often too late to apply base fertilizer. It can be applied as soon as possible during the seedling stage (4-leaf stage). How to apply potassium fertilizer to rice? Mr. Wang from Jiansanjiang in Heilongjiang and Ms. Tan from Yongzhou in Hunan asked how potassium should be applied to rice. Experts: The fertilization methods in these two places are basically the same, but the soil potassium levels are quite different. It is recommended that Heilongjiang's rice be applied with 3-6 kilograms of potassium chloride, and Hunan's rice be applied with 10-15 kilograms of potassium chloride. All or most of the basal fertilizers were applied in combination with soil preparation before transplanting, and the rest could be applied at the booting stage or earlier. How to apply K fertilizer to wheat? Mr. Gu of Shandong Qihe and Mr. Yang of Baoji of Shaanxi asked how potassium should be applied to wheat. Experts: These two regions are all in the winter wheat-summer corn rotation area, and it is recommended that 4 to 6 kg of potassium chloride be applied in the Mushi, combined with site preparation before planting. If the straw is returned to the field or organic fertilizer is applied, the potassium fertilizer may be used less frequently and the lower limit of the recommended amount may be taken. Finally, two points should be emphasized: First, potassium sulfate should be used in saline-alkaline lands; second, the amount of fertilizer should be determined through soil tests when conditions permit. How to apply potassium to cotton? Mr. Guo from Henan Xinxiang and Ms. Ma from Shihezi, Xinjiang, asked how cotton can be reasonably applied to potash fertilizer. Experts: Appropriate application of potash fertilizer can significantly increase cotton yield and quality. It is suggested that the Henan cotton area should be mixed with soil preparation before sowing. The potassium chloride should be 5~10 kg per mu. If organic fertilizer is used, the amount of potash fertilizer can be appropriately reduced and the fertilizer can be reduced to a low limit. Xinjiang is a high-quality and high-yielding cotton area, but the soil has more saline It is suggested that based on the application of organic fertilizer, Mushi potassium sulfate 5 ~ 8 kg. If organic fertilizer, potash fertilizer, or signs of potassium deficiency are not applied in the early stage, the nitrogen fertilizer in the flowering stage can be changed to a high-nitrogen-potassium compound fertilizer, or sprayed in the bud stage to flowering stage for 2-3 times 0.3%~ 0.5% potassium dihydrogen phosphate solution. How can rape be applied to potash? Mr. Fan from Quzhou, Anhui Province, asked how can rape be applied to potash? Is potassium chloride good or potassium sulfate? Experts: It is recommended to combine 8 to 10 kg of potassium chloride with KS before planting or transplanting, and combine wax fertilizer before wintering, and apply appropriate amount of plant ash or 3 to 5 kg of potassium chloride per acre. As for the type of potash, the sulfur of potassium sulfate can improve the quality of oil. If organic fertilizer or superphosphate is used, because of the rich sulfur, only potassium chloride can be used. Otherwise, potassium sulfate should be used. How do sweet potato potassium fertilizer? Ms. Qin of Zibo, Shandong, and Mr. Tu of Zhangzhou, Fujian, asked, How should sweet potato be applied to potash? Experts: Generally applied in two separates. One time before transplanting combined with site preparation, Mushi potassium sulfate 5 ~ 10 kg, another time before sealing ridge, when the ground began to potato, Mushi potassium sulfate 3 ~ 5 kg, on the side of the ridge ditch Water pouring. After doubling, several 0.3%~0.5% potassium dihydrogen phosphate solutions, or 1.5%~2.5% of turfgrass water leaching filtrates can also be sprayed. Is there as much potassium in Shandong and Fujian? Experts: Not the same, Fujian is mostly acidic soil, and potassium is less than Shandong. I have given a range of fertilizer rates above. In this range, Shandong can be lower and Fujian can be higher. How to apply potassium fertilizer to sugar cane? Ms. Luo from Guangxi Liuzhou asked, what are the benefits of applying potash fertilizer to sugar cane? How to apply it rationally? Experts: Sugarcane is high in potassium, and the soil in the south is short of potassium. Potassium fertilizer can strengthen the stalk without lodging, significantly increasing the sugar content and yield of sugarcane. For 3000-4000 kilograms of sugar cane per mu, it is recommended that 10 to 15 kg of potassium chloride be applied to the base fertilizer and 6 to 10 kg of potassium chloride should be applied during the tillering period. Can also be applied to the same amount of nutrients for general-purpose compound fertilizer as base fertilizer, high-nitrogen-potassium compound fertilizer for top dressing. How to apply potassium fertilizer beet? Mr. Dai from Tongliao, Inner Mongolia, asked, How should beets use potash? Experts: Beet is a good potassium crop, and application of potassium sulfate will help improve product quality. It is recommended to combine 6-8 kg of potassium sulfate in the field, and in the period of rapid growth of the clumps before doubling, 4-6 kg of potassium sulfate per acre. Can also be changed by the same amount of nutrients potassium fertilizer. How to apply potassium fertilizer to tea tree? Mr. Qian from Hangzhou, Zhejiang Province, asked how the tea tree should be treated with potash. Experts: Tea leaves are used as perennial leaves, topdressing with nitrogen fertilizers, and all or most of the phosphorus and potash fertilizers are applied as basal fertilizers. The amount of fertilizer and fertilization method should be different with age. Based on the application of organic manure and combined application of N and P fertilizers, autumn and winter basal fertilizers will apply 8–10 kg of potassium sulfate to young tea trees aged 2 to 3 years, and cover the soil 15 to 20 cm away from the roots of the trees; ~5 years and mature tea trees, Mushi potassium sulfate 10 ~ 15 kg, in the 20 ~ 25 cm away from the root or after the application of the middle ditch after the cover soil. Finally, it is emphasized again that reasonable application of potash fertilizer should be based on the combination of organic manure and NPK fertilizer; it is necessary to rationally select potash fertilizer and determine the potash fertilizer application rate based on soil and crop characteristics. 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