What to do about flooded cotton fields?
July and August of each year are the most rainy seasons. Waterlogging in the cotton field causes cotton plants to fall, excessive soil moisture, poor ventilation, and a drop in ground temperature, which seriously affects the growth and development of cotton. The growth and development of cotton is slow, a large number of buds fall off, and rotten bolls occur, resulting in a significant decline in yield and quality. In severe cases, the cotton plant will die and the production will cease. In particular, the insect-resistant cotton currently planted has poor resistance to waterlogging, and it is necessary to strengthen management of waterlogged cotton fields.
1. Clean up the drainage system of the cotton field as early as possible. Therefore, the drainage system of the cotton field should be carefully repaired before the onset of heavy rain to ensure unobstructed drainage. The accumulated water after heavy rain should be drained on the same day, so as not to form waterlogging, and to avoid rain waterlogging causing a large amount of cotton buds to fall off.
2. Take care of the fallen cotton plants in time. Promptly straighten the fallen cotton plant, keep up with the soiled roots, and wash away the silt on the stems and leaves with clean water. Improper handling of cotton plants or too late can cause plant injuries and reduce yield.
3. Timely cultivation of soil. The soil of the flooded cotton field has heavier compaction, poor ventilation, and low ground temperature, which seriously affects the root activity. The soil should be cultivated in a timely manner to promote the restoration of root vitality as soon as possible. Cultivation should be carried out when the soil is dry, which will increase soil compaction too early. As the root regeneration ability of cotton plants declines after waterlogging, in order to avoid root damage, cultivating should be shallow rather than deep, and 3 to 4 cm is appropriate. Two times of shallow soil cultivation are combined with intertillage, which not only facilitates the growth of the root system, but also prevents lodging again when encountering wind and rain in the future.
4. Strengthen water and fertilizer management. In order to promote the recovery of waterlogged cotton plants as soon as possible, foliar fertilization is carried out one or two times before cultivating, with an interval of 5 to 7 days. Can spray 1% to 2% urea diluent, or 0.3% potassium dihydrogen phosphate solution. After the cotton plants resume their growth, topdressing with urea in a furrow 13 cm away from the cotton plants, with an amount of 6-10 kg per mu, to meet the needs of rapid growth and development of the cotton plants. Water timely in drought, prompting more early autumn peaches to make up for the previous loss. According to many years of experiments in Weifang, Liaocheng, Shandong Province and other places, the cotton that is well watered with summer and early autumn dry water has 1.2 to 2.26 more bolls than the average single plant without watering. The single boll weight is 0.12 to 0.25 grams higher, and the yield is increased by 19%. ~33.3%.
5. Do a good job in pest control. After the waterlogged cotton resumes growth, the new branches and leaves are more and more tender, and pests such as cotton aphids, cotton bollworms, blind stink bugs, bridge builders, weevils, and whiteflies tend to cause serious damage. At the same time, the waterlogged cotton fields are prone to rot due to high soil moisture. Therefore, it is necessary to strengthen the investigation of plant diseases and insect pests and do a good job in comprehensive control. If there are many natural enemies of the pests and the damage can be controlled, pesticide control is not required to minimize the number of chemical control. If rotten bells are found, they should be picked up in time, soaked in 1% ethephon water and dried, which can reduce losses and effectively control the spread of diseases.
6. Scientific pruning. According to the author's observation, the growth period of waterlogged cotton plants is generally delayed by 5 to 8 days than that of normal cotton plants. In order to make up for the lack of early-stage bell-bearing, it is possible to make the topping late for 3 to 5 days, to beat the heart, remove the buds in time, and concentrate the nutrients to produce early autumn peaches.
7. Accelerate ripening according to local conditions. Waterlogged cotton fields are generally prone to late maturity. You should use 40% ethephon 100 to 150 ml per mu, add 50 to 60 kg of water, and spray evenly on the boll-bearing parts 20 days before the frost. The ripening effect is good. According to the author's experiment, cotton bolls can generally be spit out 7-10 days in advance, increasing the yield by 6.4%-10%.
Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for handling. phone
Small Air Hose Reel,Portable Air Hose Reel,Wall Mount Air Hose Reel,Commercial Air Hose Reel
NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.cxhosereel.com