New Technology of Cotton Field Management

1. Early shovel and trip: the management of cotton field highlights an early word, and the means to promote early development of strong seedlings are early shovel, multiple shovels, increase ground temperature, strong roots and strong seedlings to promote early development.

2. Topdressing: topdressing 10ml 15kg after setting seedlings, 20m 25kg after budding.

3. Fine pruning: cotton pruning is the key to increasing cotton production. Usually hit the top on July 5-10, and hit the top on July 15-20, in line with the principle of unequal branches from time to time. In accordance with the requirements of the variety, the number of segments of fruit branches should be kept, and the branches should be beaten as soon as possible, so as to achieve the natural cut-off of flowers from August 5 to 10.

4. Chemical branch adjustment technique: for cotton fields with rainy parts, good fertilizer and water conditions, overgrowth, daily plant growth of more than 2 cm, and cotton fields with plant height more than 50 cm, light leaves, long internodes and delicate stems before tapping, the flowering period of plastic-mulched cotton fields began in early July, and 25% butyrate and 5% metoprolol were sprayed at flowering stage in bare cotton fields. In Rain Water's cotton field with medium soil fertility and normal year, the plant height is 40ml 50cm after tapping. During the flowering period in mid-July, 0.5g of zhuangsu or 1.5g of promethamine per mu is sprayed with 50kg of water. After spraying, it can be tapped lightly or not at the top. In principle, the drug should be used three times in bud stage, flowering stage and boll stage. If the field growth is relatively weak, the drug can be used twice at the early flowering stage and the flowering and boll stage. In order to adopt the method of pharmaceutical chemical control, it is necessary to determine whether or not to use the drug according to the growth in the field, as well as the time and concentration of application. The field is not growing enough to use drugs easily, otherwise it will have a negative effect. In addition, do not blindly increase the concentration and dosage. Chemical control can not completely replace manual pruning, but must cooperate with manual pruning. If it rains within 4 hours after spraying, you must make up for spraying. The decomposition of thalidomide fails under strong light and high temperature and should be sprayed in the afternoon when the light is weak.

5. Foliar topdressing can increase boll weight and promote early maturity: spraying potassium dihydrogen phosphate or 1% urea fertilizer solution on cotton leaves at flower and boll stage can increase boll weight and promote precocity.

In late-maturing cotton fields or low-temperature years, around September 15, 40% of Minchengdi will be sprayed with 150 / 200 grams of raffle and 50 / 75 kilograms of water, which can promote early maturity and increase the rate of flowers before frost.