First, choose the appropriate fertilizer spray fertilizer cotton in different growth periods outside the roots of different purposes of fertilization, spraying the fertilizer composition is not the same, so the first should be based on different growth stages of cotton and its lack of choice of suitable foliar fertilizer. Such as to promote early development of cotton or prevent premature aging, can be sprayed with nitrogen and phosphorus fertilizer, in order to promote the growth of nutritional organs, can be sprayed with nitrogen and potassium fertilizer, and according to the growth of crops with the use of trace element fertilizer.
Second, to extend the spraying time of foliar fertilizer wet leaves The longer the foliar fertilizer wet time, the stronger the attachment ability of foliar fertilizer on the leaf surface, the higher the leaf surface absorption rate. Wetting time is generally required to be between half an hour and one hour. To achieve this requirement, wetting agents may be added to the foliar fertilizer with a wetting agent (neutral detergent at a concentration of 0.1% to 0.2%) to reduce water. Surface tension increases the adhesion of the solution on the leaf surface. Some leaf surfaces have a waxy layer that is not conducive to the wetting of the leaves and the absorption of the solution, so the spraying on the back of the leaf is also effective.
Third, with the urea mixture sprayed with different fertilizers dissolved in water, the penetration of infiltration into the leaves of different, and the effect of root fertilization is different. The urea has the best permeation effect. At the same time, urea is a neutral fertilizer and has little damage to the stems and leaves. Spraying urea and other fertilizers can increase the ability of other fertilizers to penetrate the leaf surface and improve the spraying effect. However, attention should be paid to the use of this method in busy cotton fields.
Fourth, pay attention to the spraying of the site and the number of different mineral elements in the plant movement ability is different, so the number and location of spray should be different. For some mineral elements with poor mobility, attention should be paid to spraying on fertilizer-demanding areas. For example, cotton supplements iron, it should be sprayed on young leaves, and the frequency of fertilization should be appropriately increased. For highly mobile elements (such as potassium) can be sprayed to increase the absorption area. It should be noted that if it rains within 24 hours after spraying, it needs to be sprayed again. Generally, 667 square meters of foliar fertilizer containing mineral nutrients is sprayed with 60-75 kg, and even sprayed 2 or 3 times.
Fifth, the rational preparation of the concentration of spray solution In the actual production, most farmers often foliar fertilizer formulation concentration is too high. Production practices have proven that high or low foliar fertilizer concentrations are unreasonable. The scientific and reasonable preparation concentration is: 1%~2% of urea, 0.2%~4% of potassium hydrogen phosphate, 2%~4% of superphosphate, 1%~1.5% of diammonium phosphate, 0.1%~0.2% of zinc sulfate, chlorine Potassium or potassium sulfate is 1% to 1.5% and iron sulfate is 0.05% to 0.3%.
Sixth, choose the appropriate time to carry out the top dressing fertilizer on the trend of deferring premature aging of cotton, can be sprayed 1% ~ 2% of urea solution, for the growing trend of prosperous cotton, can be sprayed 2% to 3% of the superphosphate Aqueous solution or 800 ~ 1000 times potassium dihydrogen phosphate. The time of external root fertilization generally ends from early July to mid-August, and sprays 2 to 3 times according to the growth of cotton plants. Spraying time is generally early morning or late afternoon, but it can also be sprayed on cloudy days without rain to extend the liquid.
Seventh, the root spray fertilizer should be sprayed evenly outside the root, the spraying surface should try to ensure uniformity, avoid leakage spray and heavy spray. Cotton roots outside the application of fertilization according to the above method, you can really play a small amount of fertilizer, high fertilizer utilization, quick effect, etc., and then significantly improve the cotton yield.
Second, to extend the spraying time of foliar fertilizer wet leaves The longer the foliar fertilizer wet time, the stronger the attachment ability of foliar fertilizer on the leaf surface, the higher the leaf surface absorption rate. Wetting time is generally required to be between half an hour and one hour. To achieve this requirement, wetting agents may be added to the foliar fertilizer with a wetting agent (neutral detergent at a concentration of 0.1% to 0.2%) to reduce water. Surface tension increases the adhesion of the solution on the leaf surface. Some leaf surfaces have a waxy layer that is not conducive to the wetting of the leaves and the absorption of the solution, so the spraying on the back of the leaf is also effective.
Third, with the urea mixture sprayed with different fertilizers dissolved in water, the penetration of infiltration into the leaves of different, and the effect of root fertilization is different. The urea has the best permeation effect. At the same time, urea is a neutral fertilizer and has little damage to the stems and leaves. Spraying urea and other fertilizers can increase the ability of other fertilizers to penetrate the leaf surface and improve the spraying effect. However, attention should be paid to the use of this method in busy cotton fields.
Fourth, pay attention to the spraying of the site and the number of different mineral elements in the plant movement ability is different, so the number and location of spray should be different. For some mineral elements with poor mobility, attention should be paid to spraying on fertilizer-demanding areas. For example, cotton supplements iron, it should be sprayed on young leaves, and the frequency of fertilization should be appropriately increased. For highly mobile elements (such as potassium) can be sprayed to increase the absorption area. It should be noted that if it rains within 24 hours after spraying, it needs to be sprayed again. Generally, 667 square meters of foliar fertilizer containing mineral nutrients is sprayed with 60-75 kg, and even sprayed 2 or 3 times.
Fifth, the rational preparation of the concentration of spray solution In the actual production, most farmers often foliar fertilizer formulation concentration is too high. Production practices have proven that high or low foliar fertilizer concentrations are unreasonable. The scientific and reasonable preparation concentration is: 1%~2% of urea, 0.2%~4% of potassium hydrogen phosphate, 2%~4% of superphosphate, 1%~1.5% of diammonium phosphate, 0.1%~0.2% of zinc sulfate, chlorine Potassium or potassium sulfate is 1% to 1.5% and iron sulfate is 0.05% to 0.3%.
Sixth, choose the appropriate time to carry out the top dressing fertilizer on the trend of deferring premature aging of cotton, can be sprayed 1% ~ 2% of urea solution, for the growing trend of prosperous cotton, can be sprayed 2% to 3% of the superphosphate Aqueous solution or 800 ~ 1000 times potassium dihydrogen phosphate. The time of external root fertilization generally ends from early July to mid-August, and sprays 2 to 3 times according to the growth of cotton plants. Spraying time is generally early morning or late afternoon, but it can also be sprayed on cloudy days without rain to extend the liquid.
Seventh, the root spray fertilizer should be sprayed evenly outside the root, the spraying surface should try to ensure uniformity, avoid leakage spray and heavy spray. Cotton roots outside the application of fertilization according to the above method, you can really play a small amount of fertilizer, high fertilizer utilization, quick effect, etc., and then significantly improve the cotton yield.
We have been producing Biological Products for about 50 years. Tetanus Antitoxin is the main product of our biological products, and its market share in China is over 70%, more over, it's been exported to over 20 countries. It won the title of Provincial Excellent New Products in 1998, the New Products Gold Prize by the Southeast Asia Chamber of Commerce in 2001, and the Excellent New Products Gold Cup by the Seventh Asean Congress of Traditional Chinese Medicine in 2003.
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Jiangxi Institute of Biological Products Inc. , http://www.jxinstitute.com