Remedial measures for cotton waterlogging crops
If the whole cotton plant is submerged for more than 3 days or soaked for more than 7 days, the root system will rot and turn yellow, and the top leaves will die. This kind of cotton seedlings have little possibility of survival and need to be replanted. 2-3 days after discharge, those with more than 500 surviving cotton plants per mu should be kept and intercropped with soybean, corn, sesame and other crops; those with less than 500 surviving cotton plants per mu should be replanted and changed as soon as possible. After the disaster, the root system of cotton was damaged, the main root and lateral root turned yellow, and the root tip was water-stained. The anti-stress measures of "grabbing drainage, loosening soil early, applying heavy fertilizer, preventing diseases and insect pests, topping late and pruning diligently" should be taken.
Clean up the field ditch system immediately after the occurrence of waterlogging, seize the time to drain waterlogging, deepen the border ditch and the corresponding drainage ditch, reduce the groundwater level as soon as possible, and ensure the normal growth of cotton. At the same time, it is necessary to wash the seedlings and wash the paste on the leaves and stems so as to restore the normal photosynthesis of the leaves.
After the cotton plant disaster, the cotton root system was damaged and the cotton plant was easy to lodge, so it should be timely, improve the field environment and reduce the shedding of buds and bolls.
Within a week after loosening the soil and removing the stagnant water in the field, the soil should be loosened in time, the soil surface layer should be broken, the soil permeability should be increased, the root environment should be improved, the root system should be restored, and small high ridges should be cultivated to improve the lodging resistance of cotton plants. After that, the soil should be ploughed and loosened in time to promote root growth.
To scientifically recover cotton plants with less damage, it is necessary to re-apply flower and boll fertilizer as soon as possible; for those with severe damage, first look at the application of recovery fertilizer, generally applying urea 10 kg per mu, and then appropriately postpone the application of flower and boll fertilizer, skillfully cover top fertilizer, and cooperate with potash fertilizer. advocate the application of cotton formula special fertilizer, organic and inorganic fertilizer, so as to open the pond deeply, quickly promote the onslaught, and make the cotton turn to the peak period of increasing nodes, buds and bolls as soon as possible.
Reasonable adjustment of chemical control cotton after waterlogging, the growth and development is hindered, should appropriately reduce the amount of chemical adjustment or postpone the time of chemical adjustment, depending on the situation of seedlings.
Most of the buds and bolls of the flooded cotton fell off seriously, and the growth peak was relatively delayed. In order to increase the bolls at the top of the cotton and increase the knot of autumn peaches, the topping time should be about 5 days later than normal.
After the disaster, the growth and development of cotton is hindered, and the shedding of buds and bolls is aggravated. If the cotton is harmed by diseases and insect pests again, the yield loss will be even greater. Cotton wilt, Verticillium wilt, blind Toona sinensis and other diseases and insect pests are aggravated after rain and waterlogging, and timely measures should be taken to prevent them. At present, we should focus on the overall battle for the prevention and control of cotton diseases and insect pests dominated by the third generation blind stink bugs, and earnestly do a good job in the monitoring of the third generation cotton bollworm.
Attention should be paid to the postponement of cotton growth and development after waterlogging disaster in the later stage, and the later management should be strengthened in order to make full use of cotton's self-regulation ability and reduce yield loss. During the period of restoring growth, pruning must be strengthened, new leaf branches and buds must be reduced, ineffective nutrient consumption should be reduced, and sufficient nutritional basis for boll setting in the later stage should be ensured.
- Prev
The management of cotton bud and boll period should be strengthened.
Bud stage management: after cotton enters the bud stage, all localities should adopt measures according to seedling system and classified management. In the first type of cotton field, the vegetative growth of cotton plant is exuberant, so it is necessary to regulate and control reasonably, shape the ideal plant type, promote the early boll setting, multi-boll setting and big boll setting of cotton plant; the second type of cotton field should promote the combination of control and control to promote the cotton plant to build a high yield shelf early; the third type of cotton field should develop late and grow weakly. The method of promoting both water and fertilizer should be adopted to promote the early emergence of cotton seedlings. Focus on the following aspects of work: 1, pay attention to the "four robbers" management. After interplanting in the wheat field and cotton field, the wheat should be watered and killed in time.
- Next
Scientific Chemical Control Technology of Cotton
Cotton chemical control is the most difficult technology for cotton farmers to master. According to the research of relevant departments, cotton chemical control can affect 30% of cotton production, but most cotton farmers are blindly chemical control, so it is very necessary to promote a simple and easy-to-understand cotton chemical control technology. The experience accumulated over the years is introduced as follows. The following is only the reference data of TM cotton pruning in Switzerland, and cotton farmers should use it flexibly according to soil fertility, climate and actual growth. 7-10 days after topping (around July 25): use 40 milliliters of water per mu 15
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi