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1. What is the whole process of cotton control? The whole process of cotton control is to apply the plant growth regulator as a necessary routine production increase measure to the cotton planting industry. From soaking to full bloom, according to the different purposes of each stage, low volume To high-grade fractionated drugs, combined with improved varieties and traditional cultivation techniques, the endogenous hormones caused by exogenous hormones to form a new internal and external dual-control cultivation technology system. It can design according to the target, grasp the reasonable birth process, shape the ideal plant type and field structure, and achieve the goal of high yield and quality.
Second, cotton uses the main role of ketamine to prevent plant growth, reduce plant height and fruit branch length, so that the plant type is tight and the structure is reasonable. After administration, it can promote the synthesis of chlorophyll and make the leaf color thicker and deeper, thereby improving the utilization of light and facilitating the synthesis and accumulation of organic matter. It can promote root growth, enhance the absorption capacity of roots on soil nutrients, and improve the drought resistance and resilience of plants. Regulate nutrient transport, rationally distribute light and products, promote cotton boll development and ringing, prevent rotten bells and ringing, and increase fruit set rate.
Third, the application of ketamine full-scale chemical control technology points in the cotton growth process, in accordance with a small number of multiple principles, the drug concentration and dose before the light weight, the specific time dose should be based on the level of rainfall fertilizer management, growth and appearance and medication The purpose is flexible and accurate. The number of chemical control in the whole growth period is 4-6 times, generally used in soaking, seedling to bud stage, early flowering stage and flowering and bolling period.
1. Soaking seeds If the cotton seeds are not treated with a coating, they should be soaked with a ketamine. Generally use 10 kg of water plus ketamine powder 1-2 grams to a solution of 100-200ppm, soak the selected cotton seeds for 8-12 hours, and drain the water to sow. This measure has a good effect on promoting root development and enhancing the resistance of cotton seedlings.
2, spraying in the Miao Lei period is generally around June 20, according to the growth and appearance of the drug. During the period from the three leaves to the buds, 0.5-1 gram of ketamine can be used per acre, and 20-30 kilograms of water can be sprayed on the top of the lid (after immersion can be postponed until after buds). It is required to spray evenly. If necessary, increase the number of times according to the situation, properly control the plant type, simplify the pruning and fork, and coordinate the management of water and fertilizer.
3, the initial flowering period with 2-3 tons of ketamine and 30-40 kg of water spray can inhibit the prolonged optimization of the canopy structure and delay the sealing, increase the number of high-quality bells, and simplify the mid-term pruning.
4 spraying in the flowering and bolling period is generally around August 15-25, using 3-4 grams of ketamine powder per acre, spraying 40-50 kilograms of water on the leaves, mainly to inhibit the late ineffective branches and axillary buds. , anti-corruption and late maturity, increase early autumn peach, increase the weight of the bell.
Fourth, the use of ketamine notes
1. Strictly control the use conditions. The ketamine is suitable for cotton fields with good fertilizer and water conditions. The weather is dry and the cotton fields that cannot be used for irrigation are not suitable for use. When cotton fields are damaged and natural disasters are inhibited, growth cannot be used.
2, control the amount of medication should not be greedy, should not be used in large quantities, especially in the seedling, bud and initial flowering period to strictly control the dose. If the plant grows slowly, the fruit branches are shrunk together, and the leaves do not open, causing a large number of buds to fall off, and the yield reduction is quite serious. In this case, gibberellin (920) can be sprayed in time, which has a significant effect on relieving this symptom and restoring growth.
3, pay attention to the use of water and fertilizer combined with the use of ketamine to pay attention to fertilizer management, with appropriate, must not be due to deepening of the leaves after application, and neglect fertilization and watering.
4. Pay attention to the weather changes when spraying. Generally, it is better to use before 10:00 am or 5 pm on sunny days. It can be re-sprayed once in 8 hours after spraying.
Cotton application of ketamine full-scale chemical control technology
In recent years, with the expansion of cotton planting area, the planting management technology is getting higher and higher, but there are still some drawbacks in the chemical control, such as cotton soaking and seedling stage without the use of ketamine, once it is prosperous, it is used. Not only does it not control the prosperous effect, but also causes the phenomenon of "ricky disease", flower buds falling off, less peaches, and late maturity due to improper use. The author introduces "what is the whole process of cotton control" and "how to carry out chemical control" as follows.
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