After the cotton is topping in July, the following technical measures should be taken.
First, scientific control
1. As the growth and regulation
After the cotton is topping, it is generally controlled 1 or 2 times. For the first time, after 3 to 5 days of topping, 667 square meters of seedlings were planted in 12,000 or so plots, 4 to 5 grams of ghrelotamine was applied, and 30 kilograms of water were applied; Amine 6 to 7 grams, 40 kilograms of water. For the second time, the individual development and population size of the cotton plant were controlled, and moderate re-control was performed according to the weather, soil moisture, and the appearance of the cotton plant. Generally about 8 grams of ghrelin was applied on 667 square meters. Through the action of dildo-amine, the effective control of ineffective buds and empty fruit shoots is finally achieved, and the transformation from vegetative growth to reproductive growth can be achieved, and the growth and shape of balanced growth can be shaped to ensure that the number of bolls at the top of the cotton plant and the weight of the boll are increased. Create conditions for high yields.
2. Spray properly
The correct method for spraying the diamino amine is to first dissolve the diamino amine in a weighed pot or plastic bucket container, stir it well, and add it into the sprayer with the amount of diaminopropyl amine per 100 g of the dilute amine solution.
The principle of spraying dilute amine should be uniform and dissatisfied, the spray height should not be low, and the principle of spraying should not spurt. It should be performed after 5 pm. Spraying under high temperature and strong light will reduce the effect. Rainfall within 6 hours after spraying will affect the absorption effect. If the rainfall is too long, it will be ineffective, and heavy spraying is required.
Second, according to local conditions irrigation
After the cotton is topping, it enters the peak period of reproductive growth. Flowers, buds, and bells gradually form. This stage is the stage where the cotton needs most water during the entire growth period. In the conventional furrow irrigation cotton fields, one water is less and the second water is full. Four waters should be sufficient (three and four waters are the two waters after the top), and water must be stopped before August 15th to prevent the cotton plants from becoming greedy and late.
Third, look at the long fat
After topping, cotton needs more water and fertilizer, conventionally irrigated cotton fields, basal fertilizers, and different amounts of nitrogen, phosphorus, and potassium fertilizers when irrigating primary and secondary water. After topping, nitrogen fertilizer should be applied according to the length of branches and leaves of cotton plants. 667 square meters Shi 5 ~ 8 kg. At the same time, boron fertilizer was sprayed on the leaves, and 50 grams of fast boron was dissolved in 50 kg of water spray per 667 square meters for a total of 2 sprays to increase the rate of ringing.
Fourth, timely harvest
After picking up the flocs, we must adhere to the “three whites†and pick flowers in different stages, batching and stacking in the sun, and classify and sell them to ensure that the quality and quantity of cotton are guaranteed and a bumper crop yields.
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