Although smoking is harmful to health, tobacco is an important part of China's economic returns. In the process of tobacco planting, the occurrence of deficiency syndrome seriously affects the yield and quality of tobacco. This article will explain how to prevent the occurrence of tobacco deficiency syndrome.
(1) First diagnose the cause of deficiency, and change the element in the non-absorbable state to an absorbable state.
(2) Supplementation with soil fertilization method, and prevent the absorption of certain nutrients or the absorption and utilization of other elements after supplementation. It is recommended to apply compost or fully decomposed organic fertilizer prepared by enzyme bacteria, if necessary, mix 15kg of cake fertilizer, and mix it with water to reduce the damage. When phosphorus deficiency is found, it is mixed as a base fertilizer before transplanting, or applied once by spraying. Phosphorus deficiency in the middle and late stages, foliar application of 1%-2% calcium superphosphate solution.
When potassium deficiency is found, 200 kg of plant ash or 10 kg of potassium sulfate may be applied according to actual needs, and if necessary, 2% potassium dihydrogen phosphate or 2.5% potassium sulfate solution is sprayed on the foliage. Calcium-deficient fields should be applied evenly to the soil before the tobacco is transplanted. If necessary, cough 0.2%-0.5% tobacco special compound fertilizer or 1%-2% calcium superphosphate solution. Magnesium-deficient tobacco fields can be adjusted by topdressing or external application of 0.2%-0.5% magnesium sulfate. When sulfur is deficient, 6-9 kg of gypsum or 2 kg of sulfur is applied per 667 square meters. In addition, the application of superphosphate can also meet its need for sulphur. When iron is deficient, the surface is sprayed with 0.1%-0.2% ferrous sulfate solution, and 75L of good solution is sprayed per 667 square meters.
In the absence of zinc, 1.2kg of zinc sulphate per 667 square meters or 0.5% of diamine tetraacetate sprayed, 50-60L of good solution per 667 square meters. If zinc sulfate is used, it is best to add 20% slaked lime. Adjust the pH to avoid phytotoxicity. In the absence of manganese, the application of manganese sulfate lk8 or spraying 0.05%-0.10% manganese sulfate, spray a good solution of 50-75L per 667 square meters.
When copper is lacking, 0.1%-0.2% of 96% copper sulfate solution is used. When 667 square meters is sprayed, 50-60L of boron is used, and 0.1% borax aqueous solution is used, and 60L of good solution is sprayed per 667 square meters. In the absence of molybdenum, 0.02%-0.10% ammonium platinumate is used, and 75L of a good solution is sprayed per 667 square meters. In the absence of chlorine, the production field can use bromine instead of chlorine to ensure the physiological needs of tobacco for chlorine. However, the chlorine content should not be too high, and the chlorine content in the tobacco leaves is generally 0.3%-0.5%, which would be ideal, otherwise it will affect the use value and quality of the tobacco leaves.
Butterfly Valve,Wafer Type Butterfly Valve,Triple Offset Butterfly Valve,Wafer Butterfly Valve
Haogong Valve Co Ltd , https://www.haogongvalve.com