The use of ketamine in cotton fields can coordinate the vegetative growth and reproductive growth of cotton, which is an ideal stimulation effect. The specific measures are:
First, the choice of application of the field: the reduction of the application of the cotton field: First, the cotton field soil fertility is higher or the amount of fertilizer in the early stage, and the nitrogen fertilizer ratio is significant, the cotton plant nutrition growth is too strong, there is a long trend of cotton fields, including The film cotton and wheat cotton; the second is the cotton plant with scattered plant shape and tall plants; the third is the cotton plant with excessive density, and the row spacing is unreasonable, and there is a cotton field with early closure trend. Where the soil fertility in the cotton field is poor, the growth of the cotton plant is weak and the climate is dry, it is not advisable to spray the shrinkage and safety. The application time is well established: the practice has proved that the cotton field spray should be swelled to the full bloom period and Before and after the topping is the key application period. In particular, when to use the drug, it must be arranged according to the climatic conditions at that time and the growth of the cotton seedlings.
Third, master the application dose: high-yield cotton area should vigorously promote the "fertilizer promotion and adjustment" technology, fertilizer promotion is appropriate to apply more bud fertilizer early, so that cotton can make full use of the previous period of ground power and light energy, fast and fast, quickly set up High yield seedlings. The tempering is caused by early application and multi-fertilization of fertilizers, causing vegetative growth and reproductive growth inconsistency, spraying and reducing the number of joints to ensure fertility, ensuring early, stable, and premature aging of cotton seedlings. The principle of application is “a small number of times, before being light and heavyâ€.
Under normal circumstances, from cotton buds to topping before and after the application of a total of 4 times: the bud period with a concentration of 10-20ppm for foliar spray, 10-15 days later with a concentration of 30-40ppm spray, then 10-15 After the day, it was sprayed at a concentration of 50-60 ppm, and sprayed at a concentration of 80-100 ppm before and after topping. When spraying, it is required to spray evenly, not to spray or leak, to ensure the quality of spraying, so as to avoid phytotoxicity. However, when determining the dose of ketamine, it should be determined according to the time of application, climatic conditions and various growth stages of cotton. If the application time is too early, the dosage should be light, the application time should be late, and the dosage should be high; when the rain is low The dosage should be light, the rain should be high, the dosage should be high; when the cotton plant is prosperous, the dosage should be light, and when the cotton plant is controlled to be mad, the dosage should be high.
Fourth, field management: After spraying the cotton field, the leaf color begins to deepen in 3-5 days, and the effect is best in 10-15 days. The leaf color is still deep in 30-40 days. This feature often has the capacity to create the illusion that cotton plants do not lack fertilizer, thus relaxing the management of water and fertilizer for cotton. Because cotton leaves are dark green and insects have greening characteristics, cotton fields that are sprayed after shrinking are easy to become the places where cotton pests concentrate on spawning. Therefore, after the cotton field is sprayed, it is necessary to strengthen the management of fertilizer and water. Pest control
First, the choice of application of the field: the reduction of the application of the cotton field: First, the cotton field soil fertility is higher or the amount of fertilizer in the early stage, and the nitrogen fertilizer ratio is significant, the cotton plant nutrition growth is too strong, there is a long trend of cotton fields, including The film cotton and wheat cotton; the second is the cotton plant with scattered plant shape and tall plants; the third is the cotton plant with excessive density, and the row spacing is unreasonable, and there is a cotton field with early closure trend. Where the soil fertility in the cotton field is poor, the growth of the cotton plant is weak and the climate is dry, it is not advisable to spray the shrinkage and safety. The application time is well established: the practice has proved that the cotton field spray should be swelled to the full bloom period and Before and after the topping is the key application period. In particular, when to use the drug, it must be arranged according to the climatic conditions at that time and the growth of the cotton seedlings.
Third, master the application dose: high-yield cotton area should vigorously promote the "fertilizer promotion and adjustment" technology, fertilizer promotion is appropriate to apply more bud fertilizer early, so that cotton can make full use of the previous period of ground power and light energy, fast and fast, quickly set up High yield seedlings. The tempering is caused by early application and multi-fertilization of fertilizers, causing vegetative growth and reproductive growth inconsistency, spraying and reducing the number of joints to ensure fertility, ensuring early, stable, and premature aging of cotton seedlings. The principle of application is “a small number of times, before being light and heavyâ€.
Under normal circumstances, from cotton buds to topping before and after the application of a total of 4 times: the bud period with a concentration of 10-20ppm for foliar spray, 10-15 days later with a concentration of 30-40ppm spray, then 10-15 After the day, it was sprayed at a concentration of 50-60 ppm, and sprayed at a concentration of 80-100 ppm before and after topping. When spraying, it is required to spray evenly, not to spray or leak, to ensure the quality of spraying, so as to avoid phytotoxicity. However, when determining the dose of ketamine, it should be determined according to the time of application, climatic conditions and various growth stages of cotton. If the application time is too early, the dosage should be light, the application time should be late, and the dosage should be high; when the rain is low The dosage should be light, the rain should be high, the dosage should be high; when the cotton plant is prosperous, the dosage should be light, and when the cotton plant is controlled to be mad, the dosage should be high.
Fourth, field management: After spraying the cotton field, the leaf color begins to deepen in 3-5 days, and the effect is best in 10-15 days. The leaf color is still deep in 30-40 days. This feature often has the capacity to create the illusion that cotton plants do not lack fertilizer, thus relaxing the management of water and fertilizer for cotton. Because cotton leaves are dark green and insects have greening characteristics, cotton fields that are sprayed after shrinking are easy to become the places where cotton pests concentrate on spawning. Therefore, after the cotton field is sprayed, it is necessary to strengthen the management of fertilizer and water. Pest control
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