As a plant growth regulator applied at the flowering stage of crops, ketamine can promote the reproductive growth of plants, inhibit the growth of stems and leaves, control the side branches, shape the ideal plant type, increase the root coefficient and vitality, increase the yield and improve the quality. In order to achieve the best yield increase effect, we should pay attention to some details when applying the ketamine in the cotton field. The details are as follows, for the reference of the majority of cotton farmers.
1. Select the application field. The ketamine is suitable for three cotton fields:
1. It is a cotton field with high soil fertility or high fertilization amount in cotton field, and the ratio of nitrogen fertilizer is large. The cotton plant has excessive nutrient growth and has a long trend, including cotton film and wheat cotton.
2. The variety of plant type is scattered. The plant is tall cotton field.
3. The cotton plant density is too large, and the row spacing of the plant is unreasonable, and there is a cotton field with early trend of sealing.
Any field with poor soil fertility in cotton fields and weak cotton plant growth should not be sprayed with ketamine. It is not advisable to spray ketamine when the climate is dry.
2. Grasping the time of applying the medicine Practice has proved that the spraying of ketamine in the cotton field should focus on the application period from the bud period to the full bloom period and before and after the topping. 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.
3. Master the application dose High-yield cotton area should vigorously promote the "fertilizer promotion and adjustment" technology. Fertility is the appropriate early application of bud fertilizer, so that cotton can make full use of the previous geography and light energy, fast and fast, and quickly set up a high-yield seedling. The tempering is to spray the ketamine on the cotton plants which are caused by the early application of multiple fertilizers and the vegetative growth and reproductive growth are not coordinated, so as to coordinate the growth and ensure the early development of the cotton seedlings. Stabilization. No premature aging. 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 4 times: the bud period with a concentration of 100ppm-20ppm foliar spray, interval 10-15 days and then 30X10 -6 to 40X10 - The concentration of the 6th power was sprayed, and then sprayed at a concentration of 50×10 -6 to 100×10-6 at intervals of 10-15 days. Spray before and after topping with a concentration of 80X10-6 to 100X10-6.
Spraying is required to be evenly sprayed, no heavy spray, no leakage, to ensure the quality of the spray, so as not to cause harm. The dosage of ketamine should be adjusted according to the application time, 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, the dosage should be high; when the rain is low, the dosage should be light, and the rain should be heavy. 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.
IV. Field management After spraying the ketamine in the cotton field, the leaf color begins to deepen in 3-5 days, the effect is best in 10-15 days, and the leaf color is still deep in 30-40 days. This feature tends to make people feel the illusion that cotton plants do not lack fertilizer, thus relaxing the management of water and fertilizer for cotton. Because the cotton leaves are dark green and the insects have greening characteristics, the cotton field after spraying the ketamine is easy to become a place for cotton pests to lay eggs. Therefore, after spraying the ketamine in the cotton field, it is necessary to strengthen the management of fertilizer and water. Insect control.
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