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How to apply potassium fertilizer in field crops reasonably. What are the characteristics of potassium fertilizer application in field crops compared with fruit trees and vegetables?
Experts: There are two main characteristics of applying potash fertilizer in field crops: First, the growth period of field crops is short, all or part of potash fertilizer is applied as base fertilizer, and a small part is used for seed fertilizer or top dressing. Second, most of the field crops are not applied or only applied a small amount. Organic fertilizer, therefore, is more dependent on potassium fertilizer.
How to apply potash fertilizer to corn?
Ms. Zhang from Gongzhuling, Jilin, and Mr. Liang from Hebei River asked, how should corn be applied?
Expert: Ms. Zhang is planted with spring corn. Generally, 6~10 kg of potassium chloride is applied per mu. Before the spring sowing, combined with the soil preparation and nitrogen and phosphorus fertilizer as the base fertilizer, if there is straw, the amount of potassium fertilizer can be reduced appropriately, and the lower limit of the recommended amount is taken. Mr. Liang is planting summer corn, and it is recommended to apply 6~10 kg of potassium chloride per mu. The difference is that summer corn is rushed to breed, and it is often too late to apply the base fertilizer. It can be applied as early as possible in the seedling stage (4 leaf stage), and the soil is covered in time after application.
How to apply potash fertilizer in rice?
Mr. Wang from Jiansanjiang in Heilongjiang and Ms. Tan from Yongzhou in Hunan asked how to apply potash fertilizer in rice.
Experts: The fertilization methods are basically the same in these two places, but the soil potassium levels are quite different. It is recommended that the rice in Heilongjiang should be applied with 3 to 6 kg of potassium chloride, and the rice in Hunan should be 10 to 15 kg of potassium chloride. All or most of the base fertilizer, combined with the preparation before the transplanting, the rest can be applied at the booting stage or earlier.
How to apply potassium fertilizer to wheat?
Mr. Gu from Qihe, Shandong, and Mr. Yang from Baoji, Shaanxi, asked how to apply potassium fertilizer to wheat.
Experts: These two areas are winter wheat-summer corn rotation area. It is recommended to apply 4~6 kg of potassium chloride in combination with the application of soil preparation before sowing. If the straw is returned to the field or organic fertilizer is applied, the potassium fertilizer can be appropriately applied less, and the lower limit of the recommended amount is taken.
Finally, we must emphasize two points: First, the salt and alkali should use potassium sulfate; second, when there are conditions, the amount of fertilizer should be determined through soil testing.
How does cotton apply potassium?
Mr. Guo from Henan Xinxiang and Ms. Ma from Shihezi, Xinjiang asked how cotton can be used reasonably.
Expert: Appropriate application of potassium fertilizer can significantly increase the yield and quality of cotton. It is recommended that the Henan cotton area be combined with pre-sowing land preparation, and the application of potassium chloride should be 5~10 kg. If organic fertilizer is applied, the amount of potassium fertilizer can be appropriately reduced, and the amount of fertilizer applied is low. Xinjiang is a high-quality and high-yield cotton area, but the soil has many saline-alkali. It is recommended to apply 5~8 kg of potassium sulphate on the basis of applying organic fertilizer. If organic fertilizer, potassium fertilizer, or potassium deficiency symptoms are not applied in the early stage, the nitrogenous fertilizer in the flowering and bolling period can be changed to the high nitrogen and potassium compound fertilizer, or sprayed 2 to 3 times in the bud stage to the flowering and bolling period. 0.5% potassium dihydrogen phosphate solution.
How to apply potash fertilizer in rapeseed?
Mr. Fan from Wuzhou, Anhui Province asked how to apply potash fertilizer to rapeseed? Is potassium chloride or potassium sulfate good?
Experts: It is recommended to apply 8~10 kg of potassium chloride in combination with the soil before planting or before transplanting. Before the winter, combine with the wax fertilizer, and then apply the appropriate amount of plant ash or 3~5 kg of potassium chloride per mu. As for the type of potash, the sulfur of potassium sulfate can improve the quality of the oil. If organic fertilizer or superphosphate is applied, because it is rich in sulfur, only potassium chloride can be used, otherwise potassium sulfate should be used.
How does sweet potato apply potassium fertilizer?
Ms. Qin from Shandong Zibo and Mr. Tu from Fujian Zhangzhou asked how should sweet potato be applied?
Expert: Generally divided into two applications. One is to combine the land preparation before transplanting, and the potassium sulphate is applied 5~10 kg. The other time, before the ridge is closed, when the potato begins to be grounded, the potassium sulphate is applied for 3~5 kg, and the ridge is applied on one side of the ridge. Watered with water. After the ridge is closed, a 0.3% to 0.5% potassium dihydrogen phosphate solution or 1.5% to 2.5% of the ash water leachate may be sprayed.
Is there the same amount of potassium in Shandong and Fujian?
Expert: Not the same, Fujian is mostly acidic soil, which is more potassium than Shandong. I gave a range of fertilization amounts above, in which Shandong can be lower and Fujian can be higher.
How can sugar cane be applied?
Ms. Luo of Liuzhou, Guangxi asked, what are the benefits of applying sugar cane to sugar cane? How to apply it reasonably?
Experts: Sugar cane is potassium, and the soil in the south is also deficient in potassium. Potassium fertilizer can strengthen the stems without lodging, and significantly increase the sugar content and yield of sugar cane. In terms of 3,000 to 4,000 kilograms of sugar cane per mu, it is recommended to apply 10 to 15 kilograms of potassium chloride to the base fertilizer, and to apply 6 to 10 kilograms during the tillering period. It can also be applied to the general-purpose compound fertilizer with the same amount of nutrients as the base fertilizer and the high-nitrogen potassium compound fertilizer as the top dressing.
How to apply potash fertilizer?
Mr. Dai from Tongliao, Inner Mongolia, asked how sugar beet should be used.
Expert: Beet is a potassium-producing crop, and potassium sulphate is beneficial to improve product quality. It is recommended to apply 6~8 kg of potassium sulphate in combination with the soil preparation, and in the rapid growth period of plexus before sealing the ridge, apply 4~6 kg of potassium sulfate per mu. It is also possible to apply the potassium-containing compound fertilizer according to the same amount of nutrients.
How to apply potash fertilizer to tea trees?
Mr. Qian from Hangzhou, Zhejiang asked how to apply potash fertilizer to tea trees?
Experts: Tea trees are used for perennial leaf, topdressing is mainly nitrogen fertilizer, and all or most of phosphorus and potassium fertilizers are applied as base fertilizer. The amount of fertilizer and fertilization method should vary with the age of the tree. On the basis of applying organic manure and nitrogen and phosphorus fertilizers, the base fertilizer for autumn and winter is applied to the young tea trees of 2~3 years, 8~10 kg of potassium sulfate is applied, and the soil is covered after 15~20 cm from the root of the tree root; ~5 years and mature tea trees, 10 to 15 kilograms of potassium sulphate, covered with soil at 20 to 25 cm from the root of the tree or after the middle ditch.
Finally, it is emphasized that potassium fertilizer should be applied reasonably on the basis of the combination of organic fertilizer and NPK fertilizer; potassium fertilizer should be selected according to soil and crop characteristics and the amount of potassium fertilizer should be determined. (This issue of experts: Senior Consultant of Sinofert, Professor of China Agricultural University Wang Xingren)
How to apply potash fertilizer in field crops
What are the characteristics of potash application in field crops?
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