What to Do About Lodging in Plastic-Film Cotton? The Latest Prevention and Control Methods
In our daily lives, we cannot do without cotton. Cotton is grown extremely widely in our country, and in the cotton-growing process, lodging is one of the newest and most troublesome problems. If it is not dealt with in time, it will cause severe reductions in cotton yield. Below, the editor brings you the prevention and control methods for lodging in plastic-film cotton, hoping to help everyone.
1. Remove the plastic film at the right time
Research from many places shows that the main root of double-film cotton is cut off during transplanting, and a large number of lateral roots and fibrous roots grow in the shallow soil layer. Because the temperature and fertilizer-water conditions are good, and in addition the soil fertility is sufficient, double-film cotton absorbs fertilizer and water more strongly at the squaring and flowering stages than direct-seeded cotton, and its vegetative growth and reproductive growth are also stronger than direct-seeded cotton. At this time, if the plastic film is removed at the right time and intertillage and hilling are strengthened, double-film cotton will be able to give fuller play to its advantages. However, if the film is not removed for a long time, once extreme weather arrives, because the root system is distributed relatively shallowly and its supporting capacity is poor, lodging is extremely likely. Therefore, the plastic film must be removed at the right time, with fine management to promote and protect roots. The appropriate time for removing the film is the early flowering stage.
2. Fertilization
⟦NL>Because the growth and development process of plastic-film cotton is 20-30 days earlier than that of direct-seeded cotton, and its consumption in the early stage is greater than that of direct-seeded cotton fields, management measures must be moved up accordingly. In particular, sufficient flower and boll fertilizer should be applied quickly, with 10-15 kg of urea per mu, or 10-15 kg of ternary compound fertilizer. For cotton fields lacking potassium, 5-10 kg of potassium fertilizer should be applied per mu. When the average number of bolls per cotton plant is 2-3, 15 kg of urea should be topdressed per mu at this time. If fertilizer and water management is neglected, then after boll setting the cotton will turn yellow over a large area, and in severe cases it will also be accompanied by physiological wilt and premature senescence.3. Coordinate balanced growth
Because plastic-film cotton grows and develops relatively quickly, it is also very prone to excessive vegetative growth, so relevant measures must be taken to balance income and expenditure. After cotton enters the full squaring stage, spray the retarding-type plant growth regulator mepiquat chloride or cycocel, 2-3 grams or 8-12 milliliters per mu mixed with 40 kg of water. At the same time, pay attention to spraying the regulator to prompt the leaf color to quickly turn dark green; third, pay attention not to leave residual film in the field when removing the film, so as not to affect intertillage, hilling and subsequent crop management; fourth, spray boron fertilizer 2-3 times, and high-content Solubor is recommended.
The above is an introduction to the prevention and control methods for lodging in plastic-film cotton. I hope it can help you. To learn more related knowledge, please keep following us.