Experience in High-yield cultivation of Cotton

First, before sowing, you should first buy improved cotton seeds, advocate changing cotton seeds every year, and never be cheap, and use second-or third-generation cotton seeds, because the output of self-retained seeds will be reduced by about 10% every year. Use about 1.5 kilograms of seeds per mu, dry the seeds before sowing, the cumulative drying time is not less than 30 hours, and constantly turn over. Be careful not to spread it directly on the cement floor, brick floor or metal plate. Before sowing, the soil moisture must be made and preserved in time so that the soil moisture can be planted.

Second, apply sufficient base fertilizer scientifically, generally apply 340 square meters of high-quality farm manure, 10 kg of urea, 20 kg of diammonium, 20 kg of potassium sulfate compound fertilizer, and 2 kg of boron, zinc, manganese, iron and other trace fertilizers.

Third, sowing and sowing early in time will cause incomplete seedling emergence, aggravate seedling diseases and premature senescence in the later stage due to low temperature; too late is easy to cause overgrowth, sitting peach on the top, missing the best boll period, which is not conducive to high yield. The best sowing time is around April 20. Sowing depth of about 3 cm, according to soil moisture generally grasp the depth is not more than an inch, shallow do not show seeds. The soil with good soil moisture is slightly shallower than clay, and the soil with poor soil moisture can be a little deeper.

Fourth, reasonable close planting of sandy soil, appropriate close planting of poor fertility; appropriate sparse planting of clayey soil and good fertility, my practice is: planting in large and small rows, about 1 meter in large rows, 55 centimeters in small rows, and about 40 centimeters apart between plants. When planting with tractor plastic film mulching, there are now a considerable number of cotton farmers who leave too many seedlings at seedling stage, early closure of cotton lines, poor ventilation and light transmission, resulting in reduced photosynthesis, serious shedding of buds and bolls, aggravation of cotton diseases and insect pests, and increase of ineffective branches, which is not conducive to field operation. the yield and quality of cotton are reduced, affecting income.

Fifth, topdressing and watering generally do not need watering at the seedling stage, 20 kg of urea per mu at the flower and boll stage, and about 15 days of drought at the early flowering stage. At noon, the leaves should be watered in time when they wilt slightly, even if it rains and is not permeable. Finally, after cotton bolls are opened, they should also be watered once in case of drought, which can improve root vitality, delay cotton senescence, increase boll weight, and increase yield by about 10%.

Sixth, the scientific use of chemical control and topping is the key measure to build a high-yield shelf and achieve high yield. Chemical control begins at the budding stage, 0.5 grams per mu at 6-8 leaves, 1.5 grams per mu at early flowering stage, and 3 grams per mu after topping. Master the principle of "light in front and heavy in back, a small number of times". To hit the top, we should master "time to wait for branches, branches to see the growth". Generally, the cotton field will be completed on July 15-20.

Seventh, pest control seedling stage can choose up to 2116 days plus carbendazim plus imidacloprid, can prevent and cure pests, and then each spray will add carbendazim liquid sterilization, phoxim, malathion, cypermethrin, avermectin and other pesticides can be used alternately to control cotton bollworm, blind Toona sinensis, red spiders, etc., while spraying, alternately add potassium dihydrogen phosphate, urea, micro-fertilizer and so on.

8. Trying to save labor and time is an important part of reducing costs, because now every time you save work means you can save 30-40 yuan.

1. Spray. The use of high concentration, low capacity spray, the principle is the same as the usual dosage, according to the conventional spray every 9 days or so 3 times the amount of spray, each barrel spray about 3 mu, the practice is High throttle, small water gate, walk backwards, avoid windy weather, let the liquid form fog and fall freely, spray two ridges per trip, put on trousers, long coat and glasses mask to prevent poisoning, spray medicine before 10:00 and after 5pm, you can work all day if it is cloudy. In this way, the medicine can be sprayed once in about 30 days, which can achieve the ideal control effect and save labor.

two。 Prune. Leave 1 or 2 leaf branches during the first cotton trimming at the end of June, which can greatly reduce the growth of superfluous buds (hairy ears), reduce ineffective nutrient supply, and save labor. Around July 15, the top center and the leaf center are knocked off, and the leaf branches can also bear 3 or 5 peaches, which is equivalent to a small cotton.

If cotton is managed according to the above methods, the yield per mu can reach 375 to 400 kg. Although the cotton price is declining, a relatively ideal income can be obtained through high yield.