Which field crops need potash?
Mr. Qu from Suzhou, Anhui Province: Which field crops need potash? Is there any need to apply potash?
A: Potassium is an essential nutrient for plants, and every crop needs it; but as a fertilizer, it should be applied only when it is lacking. Whether to apply or how much to apply, mainly as material needs and soil fertility characteristics, generally, corn, soybean and other food crops, sweet potato, potato and other potato crops, cotton, hemp and other fiber crops, sugar beet, sugar cane and other sugar crops Generally, field crops need more potash; in southern red-yellow soils and coastal rainy areas, soils need more potash than northern and northwestern soils; soils and crops that do not apply or use organic fertilizers for a long time are especially needed. In short, most crops or soils require the application of potash, and only a few are not required. However, due to the lack of potassium resources, organic fertilizer should be fully developed and utilized. On this basis, limited potash should be given priority to crops or soils that require potassium fertilizer.
How much potash is suitable for field crops?
Ms. Lin from Weifang, Shandong, and Mr. Gu from Chenzhou, Hunan, asked: How much potash is suitable for field crops?
A: How much potassium fertilizer should be applied is mainly regarded as the characteristics of fertilizer demand, yield level and soil potassium supply level. Generally speaking, the amount of potassium applied in the mu is about 4-8 kg in the south and southeast coastal areas; about 3-7 kg in the Huanghuaihai area; about 2-5 kg ​​in the northeast; and about 0-4 kg in the northwest. The fertilizer application rate is obtained by dividing the nutrient application amount by the nutrient content of the fertilizer. For example, a certain sorghum in the northeastern region needs to apply 4 kg of potassium per mu, and switch to potassium chloride (60% of potassium): 4 0.60 = 6.7 (kg). Of course, if you want to do more accurate quantification, you must also fertilize with the help of soil testing formula.
When should the potash fertilizer in the field crop be applied?
Mr. Qi of Jilin Tieling asked: When should the potash of the field crop be applied? How to apply?
A: Field crops, especially food crops, have a relatively short growth period. It is difficult to apply potassium fertilizer at a later stage. Therefore, potassium fertilizer is generally applied to the soil when applying the base fertilizer. For rice, it is also possible to leave about 1/3 of the potassium fertilizer at the jointing and booting stage. Can you directly spread the potash on the ground during the corn jointing period?
Ms. Bian of Xinxiang, Henan asked: Can I put the potash on the ground during the jointing stage of the corn, and then rush to the soil when it rains?
A: No. We have done experiments. After the heading, the wheat, the diammonium and the potassium chloride were sprinkled between the rows, and then sprinkled. It was found that the nitrogen that was washed into the soil accounted for the majority, and the potassium accounted for a small part, and the phosphorus was almost Not leached. Therefore, for phosphorus or potassium fertilizer or compound fertilizer containing phosphorus and potassium, it must be applied after deep application.
What if the wheat is given a fake fertilizer with insufficient nutrient content?
Mr. Yu of Baoji, Shaanxi asked: When the wheat was planted, it was found that the NPK compound fertilizer used as the base fertilizer was fake, and the nutrient content was less than 5%. What should I do?
A: It can be combined with irrigation in the seedling stage, and apply appropriate amount of nitrogen fertilizer, such as before winter and during the jointing stage, respectively, applying 3-6 kg of urea and 10-15 kg of urea respectively; spraying 0.3% of the times within one week after jointing to heading. Potassium dihydrogen phosphate solution, if nitrogen deficiency, can also spray 0.5% urea solution at the same time. Foliar fertilizer can not only make up for post-fertilization, increase 1000-grain weight, but also prevent dry wheat hot air.
Does peanut have a lot of empty shells and potassium fertilizer?
Ms. Qi of Baoding, Hebei Province: I have a lot of empty shells, which is related to the application of potassium fertilizer?
A: Yes. Peanut empty shell is mainly calcium deficiency, which causes many reasons for calcium deficiency. One of them is excessive application of potassium fertilizer, which inhibits the absorption and utilization of potassium fertilizer by crops, especially sand land, which should be applied together with organic fertilizer or in divided applications.
Is it good to use large particles of rice for potash fertilizer?
Mr. Yang from Donggang, Liaoning Province asked: Is it good to use large granules or powdery?
A: It is best to use large-grain potassium fertilizer. The reason is that it is not easy to stick to the hairy rice leaves, and it will not be burned when there is dew. Second, the large-grain potassium fertilizer has sustained release and can reduce nutrient loss. (Expert: Senior Consultant of Sinochem Fertilizer Company, Professor of China Agricultural University Wang Xingren)
Farmers Daily
Mr. Qu from Suzhou, Anhui Province: Which field crops need potash? Is there any need to apply potash?
A: Potassium is an essential nutrient for plants, and every crop needs it; but as a fertilizer, it should be applied only when it is lacking. Whether to apply or how much to apply, mainly as material needs and soil fertility characteristics, generally, corn, soybean and other food crops, sweet potato, potato and other potato crops, cotton, hemp and other fiber crops, sugar beet, sugar cane and other sugar crops Generally, field crops need more potash; in southern red-yellow soils and coastal rainy areas, soils need more potash than northern and northwestern soils; soils and crops that do not apply or use organic fertilizers for a long time are especially needed. In short, most crops or soils require the application of potash, and only a few are not required. However, due to the lack of potassium resources, organic fertilizer should be fully developed and utilized. On this basis, limited potash should be given priority to crops or soils that require potassium fertilizer.
How much potash is suitable for field crops?
Ms. Lin from Weifang, Shandong, and Mr. Gu from Chenzhou, Hunan, asked: How much potash is suitable for field crops?
A: How much potassium fertilizer should be applied is mainly regarded as the characteristics of fertilizer demand, yield level and soil potassium supply level. Generally speaking, the amount of potassium applied in the mu is about 4-8 kg in the south and southeast coastal areas; about 3-7 kg in the Huanghuaihai area; about 2-5 kg ​​in the northeast; and about 0-4 kg in the northwest. The fertilizer application rate is obtained by dividing the nutrient application amount by the nutrient content of the fertilizer. For example, a certain sorghum in the northeastern region needs to apply 4 kg of potassium per mu, and switch to potassium chloride (60% of potassium): 4 0.60 = 6.7 (kg). Of course, if you want to do more accurate quantification, you must also fertilize with the help of soil testing formula.
When should the potash fertilizer in the field crop be applied?
Mr. Qi of Jilin Tieling asked: When should the potash of the field crop be applied? How to apply?
A: Field crops, especially food crops, have a relatively short growth period. It is difficult to apply potassium fertilizer at a later stage. Therefore, potassium fertilizer is generally applied to the soil when applying the base fertilizer. For rice, it is also possible to leave about 1/3 of the potassium fertilizer at the jointing and booting stage. Can you directly spread the potash on the ground during the corn jointing period?
Ms. Bian of Xinxiang, Henan asked: Can I put the potash on the ground during the jointing stage of the corn, and then rush to the soil when it rains?
A: No. We have done experiments. After the heading, the wheat, the diammonium and the potassium chloride were sprinkled between the rows, and then sprinkled. It was found that the nitrogen that was washed into the soil accounted for the majority, and the potassium accounted for a small part, and the phosphorus was almost Not leached. Therefore, for phosphorus or potassium fertilizer or compound fertilizer containing phosphorus and potassium, it must be applied after deep application.
What if the wheat is given a fake fertilizer with insufficient nutrient content?
Mr. Yu of Baoji, Shaanxi asked: When the wheat was planted, it was found that the NPK compound fertilizer used as the base fertilizer was fake, and the nutrient content was less than 5%. What should I do?
A: It can be combined with irrigation in the seedling stage, and apply appropriate amount of nitrogen fertilizer, such as before winter and during the jointing stage, respectively, applying 3-6 kg of urea and 10-15 kg of urea respectively; spraying 0.3% of the times within one week after jointing to heading. Potassium dihydrogen phosphate solution, if nitrogen deficiency, can also spray 0.5% urea solution at the same time. Foliar fertilizer can not only make up for post-fertilization, increase 1000-grain weight, but also prevent dry wheat hot air.
Does peanut have a lot of empty shells and potassium fertilizer?
Ms. Qi of Baoding, Hebei Province: I have a lot of empty shells, which is related to the application of potassium fertilizer?
A: Yes. Peanut empty shell is mainly calcium deficiency, which causes many reasons for calcium deficiency. One of them is excessive application of potassium fertilizer, which inhibits the absorption and utilization of potassium fertilizer by crops, especially sand land, which should be applied together with organic fertilizer or in divided applications.
Is it good to use large particles of rice for potash fertilizer?
Mr. Yang from Donggang, Liaoning Province asked: Is it good to use large granules or powdery?
A: It is best to use large-grain potassium fertilizer. The reason is that it is not easy to stick to the hairy rice leaves, and it will not be burned when there is dew. Second, the large-grain potassium fertilizer has sustained release and can reduce nutrient loss. (Expert: Senior Consultant of Sinochem Fertilizer Company, Professor of China Agricultural University Wang Xingren)
Farmers Daily
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