Hao Yuti Wang Shuping Shen Xiaohong Zhang Canliang Chen Tao (Shandong Shengfeng Seed Industry Technology Co., Ltd.)
Cotton is the main economic crop in agricultural production, and it is also the main source of income for farmers in the cotton area. If you want to plant insect-resistant cotton and increase economic efficiency, you must master the following key cultivation techniques.
1 well sowing "Six Off"
1.1 Put a good site
Where Chunmian cotton includes cotton spring interplanting, it will start turning winter and freeze in winter, deepen the tillage layer, deepen 25-30cm into deep snow, can weather the soil, freeze dead eggs, and reduce pests and diseases. Before finishing the broadcast, the land should be well-prepared.
1.2 Put a good bottom fertilizer clearance
In late March (soil preparation before planting or transplanting), the total amount of organic fertilization can be 2~3m3 per acre, 35kg of N, P, K ternary compound fertilizer or 15kg of potassium sulfate (or potassium chloride). Potassium chloride can improve cotton fiber quality and lint, but salt and alkali can not be used), superphosphate 50kg, copper sulfate 2kg, boron fertilizer 1 ~ 1.5kg, zinc fertilizer 1.5 ~ 2kg fertilization after the flat.
L.3 Turn off the good planting process
In addition to coated seeds (to dry on the mat or cotton bag for two or three days, it is forbidden to dry directly on the cement floor, so as not to produce hard seeds to reduce the germination rate), where the seeds used for sowing are selected on the basis of 23 days of drying In general, 100 times of carbendazim and potassium dihydrogen phosphate, 1g dildoamine, or 4mL of Zhuangjinsu added 10kg of water to soak seeds for 20h, and then it can be sown after drying to the kind of white hair to ensure that the cotton seedlings are unearthed quickly and homogeneously. Strong, prevent pests and diseases.
1.4 to put a good feeling
When cotton is sown, it must be ensured that the bottom of the plant is adequate and the surface of the plant must be well-being.
1.5 sowing time off
In order to obtain high yields and good quality, it must be broadcast in due course. Grab the cold-cold-head warm-head and catch fine seeds. It must be broadcast in the best sowing date of the cotton (April 15th to April 25th) to secure the April seedlings. This is to obtain Early spring cotton early-maturing, high-quality, high-quality guarantee and foundation.
1.6 put a good sowing
When sowing, first, master the seeding rate according to the requirements of different varieties. General cotton (photon) 2250-2750 capsules / kg, high yield cotton fields (spring cotton) 25,000 to 3,000 per mu seedlings, seeding four or five tablets per hole, seeds per acre need 1.5 ~ 2.5kg (photon dosage smaller, Mao Ziduo some). Seeding depth 2.5 ~ 3cm, the same depth. While sowing, keep ready seedlings to make up for seedlings to ensure consistency in density and seedling age. Spring cotton should be covered with plastic film to ensure strong hair growth early. In areas where the underground pests are severe, furandan poison baits (2 to 2.5kg per mu) or phoxim toxin must be applied under the mulch (50g of phoxim per acre is mixed with 250g of water, evenly mixed in 5kg of wheat bran on). 7 days before sowing, the mulch is covered or accompanied with the cover. When the cover film is tightened, the tamping and tightness shall be tightened. Every 1 to 2m of the membrane shall be pressed against a mound to prevent the wind from uncovering the film.
2 Seedling management
Main attack strong seedlings early.
2.1 early fixed seedlings: In order to seedling management in a timely manner, and promote strong seedlings, the cotton fields to early set seedlings. After sowing seedlings in the cotton field, the seedlings will be placed on the seedlings, leaving seedlings in each hole and then seedlings. Drilled cotton fields When the first true leaves appear in the cotton seedlings, leave the seedlings at a predetermined planting distance and set them once. There are shortages of seedlings in time to make up with plantlets.
2.2 Pest Control: When seedlings are exposed to low temperature and humidity, three major diseases of cotton seedling blight, anthracnose, and red rot are easy to occur. They can be promptly treated with carbendazim, chlorpromazine, mancozeb, and other chemicals. Hydrogen potassium or 0.2% urea water (15 kg water plus 50 g urea) is sprayed. Seedling insect pests mainly include cotton aphids and ground tigers. When the number of aphids in front of the trifoliate was 30%, the number of aphids per plant was 5, and the number of aphids after a trifoliate was 5%, chemical control should be carried out in time. The pesticides are dominated by organic phosphorus and less pyrethroid pesticides are used. In the event of a local tiger hazard, use 90% crystal trichlorfon mixed with wheat bran in the evening.
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