How to manage the latest cotton planting? Course on planting techniques and methods for High yield of Cotton

Cotton is an important economic crop in China, and in order to achieve the high yield of cotton, it is necessary to do a good job in the management of each growth period in the process of cotton planting. So how to manage cotton when it is planted? How to get high yield? Let's take a look.

1. Pruning and topping

The topping time of cotton starts from the first and middle of July to the end of mid-August, when pruning and topping, on the one hand, removes the crazy growing branches, superfluous buds and edge centers, and on the other hand, removes the tips of the middle and lower parts of the plant, in order to shape the plant type, remove the top advantage of the plant, improve the ventilation and light transmission conditions of planting, distribute nutrients reasonably, so as to improve the absorption capacity of the root system, and reduce the occurrence of rotten bolls. However, when beating the top and picking the heart, it should be noted that the plots with high planting density and weak growth should be hit early, while those with low planting density and prosperous growth can be hit appropriately late.

2. Strengthen the management of fertilization.

The principles of fertilization for cotton are light application of seedling fertilizer, steady application of bud fertilizer, heavy application of flower and boll fertilizer, and supplementary application of top fertilizer. There is a greater demand for fertilizer at the flower and boll stage. When most plants bloom, 20-30 kg compound fertilizer can be applied per mu. The plots with insufficient base fertilizer and poor soil fertility should be applied early. At this time, we should mainly strengthen the supplementary application of top fertilizer, in order to prevent the lack of fertilizer and premature senescence in the later stage to make it bear more peaches and increase boll weight, especially when the flower and boll fertilizer is insufficient. 6-7 kg potash fertilizer + 10-15 kg urea per mu can be applied before the middle of August, but the potassium plot can appropriately increase the amount of fertilizer. When fertilizing, it is best to sprinkle it to ditch or strip application, and topdressing between rows can be done. Too close to the root is easy to burn root and senescence prematurely. This fertilizer application method is more conducive to fertilizer efficiency, both root maintenance and root protection. In addition, the leaf fertilizer should be sprayed before and after topping, and the root absorption of the plant is weak in the later stage, and foliar fertilizer spraying can provide sufficient nutrient supply for cotton plants and ensure the smooth development of cotton peach.

3. Timely watering to prevent drought

Cotton has a long growth cycle and large water demand, so it should be flexibly decided according to the weather, soil moisture and growth when watering, especially in the flowering and boll period, the water demand can reach 45% 65% of the total water demand. Generally at noon, the withering of the top leaves of the plant means that there is a lack of water, so it should be watered in time, drip irrigation can be carried out if there are conditions, and those without can be irrigated in the trench. Watering is best combined with flushing fertilizer, preferably before 10:00 or after 4 p.m. In addition, it should be noted that in August, the temperature is high, the light is strong, the cotton is in the boll setting period, the water consumption is large, and autumn drought is very easy to occur, so it is necessary to water in time. In addition, pouring heavy water or sudden heavy rain after a long drought will cause "sudden death and premature senility" of cotton, which should be noted.

4. strengthen the prevention and control of diseases and insect pests

The main cotton diseases and insect pests are cotton bollworm, red spider, white spider, aphid, red leaf stem blight, Fusarium wilt and so on. Measures should be taken for different diseases and insect pests, such as methamido salt and chlorobenzamide can be used to control cotton bollworm; spiromites + pyridaben can control red spiders, carbendazim, carbendazim, chloramphenicol and other drugs can control Fusarium wilt. When spraying, it is best to choose from 4pm to evening, and focus on spraying the back of leaves.

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