Cultivation techniques of Cotton covered with plastic Film
Cotton plastic film mulching has the characteristics of stable yield, high yield, high quality and the same economic effect. the yield per mu is up to 100W. The main cultivation measures are as follows:
1. Fine soil preparation, the first deep soil layer, fertilizer and water conservation of the land, made into a width of 60-70 cm, 8-10 cm high bed, with wood rolling repeatedly suppressed twice.
two。 Seed treatment should be in the sun, strict seed selection, sulfuric acid depilation, germination test, and cold water before sowing.
3. Sowing at the right time, the best sowing time is 7500-850 seedlings per mu from April 25th to 30th, covered with film in the middle of the edge to avoid water loss.
4. Apply 3000-4000 kg of farm manure, 50-80 kg of ammonium sulfate, 15 kg of phosphorus and 5-10 kg of potash fertilizer per mu of scientific fertilization. the main application method is base fertilizer, and the rest of nitrogen fertilizer is less than 10 cm. Excessive application of chemical fertilizer at one time, resulting in the phenomenon of rotting sprouts.
5. Strengthen the management of pyrethroids pesticides to water, use 3000-5000 times liquid to control cotton bollworm and cotton aphid at the same time; help cotton pruning, ─ 10 on July 5 hit the top, leaving 6.5-70000 fruit branches per mu whichever is whichever is higher, and 2-3 fruit knots are left on fruit branches on July 15; on July 5, ─ 10 is sprayed; ethephon should be sprayed in time to accelerate ripening when less than half of the work is done on September 20.
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Study on dose absorptivity of Cotton to Dexamethasone
The characteristics of infinite growth habit and great plasticity of plant type of cotton determine that it must be adjusted many times during its growth period, especially under the cultivation mode of "early, dense, dwarf and film", through directional induction to shape the reasonable field structure and obtain the best time and space distribution of cotton bolls. in this paper, by using large-scale spraying machinery, taking Xinluzao 23 as the object, the absorption rate of acetylamine in different stages of cotton growth and development was studied as follows. 1. The traction power of the spray machinery is between 30 and 65 horsepower, and the volume of the spray can is between 1.7 and 2.2 cubic meters.
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Application proportion of Special Fertilizer in Cotton drip Irrigation Field
First, the total amount of cotton fertilizer input in high latitude sub-suitable cotton areas per unit yield of seed cotton 300-380 kg, the need to put 70-80 kg of natural fertilizer, equivalent to 160-180 kg of standard fertilizer. To achieve "jin fat cotton". If you put 1 kg of standard fertilizer, you can produce 1 kg of lint. 137 regiment soil test results and cotton plant nutrition diagnosis generally lack zinc, 1-2 kg zinc fertilizer is applied in autumn, and the yield is increased by 5% and 10%. For plots rich in potassium, the application of potash fertilizer is 5-10 kg, especially
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