When cotton is flooded, is there still a chance to save it?

Water is the most abundant component of cotton plants, and water accounts for more than 3 4 percent of the fresh weight. The role of water in the growth of cotton is mainly manifested in: water is a very important solvent in cotton plants, and all metabolic activities such as absorption, operation, synthesis and decomposition of nutrients must be mediated by water; Water is also the raw material for photosynthesis to make organic matter, and without water, photosynthesis cannot be carried out, and cotton will absorb a large amount of water when exposed to water, causing cotton fibers to swell, and then squeeze each other and tightly wrap around.

This is not a problem, the problem is that after absorbing water, no matter how dehydrated or dried, the cotton fibers will form a tight bond similar to felt because they are tightly wound with each other.

After the hail disaster, it is necessary to clean up the farmland in time, clean up the dead branches and leaves that are damaged and smashed, and check the specific damage of crops. Hail often strikes at the same time as heavy rain, which will cause water accumulation in the field, so it is necessary to drain the water in time. The strong convective weather brought long-lost rainfall to Shandong, alleviating the drought in most areas, and we all know that Shandong has suffered from dry weather that has not been encountered for many years since the beginning of spring, which has brought serious varying degrees of impact on wheat harvest and corn planting.

Hail in Heze, crops are destroyed, if there is insurance will be better, like we will buy insurance for wheat here, when the wheat is almost ripe, a little poplar catkins, a large area of fire, can not be saved, this year burned a lot of wheat fields, we are a single county, there is no rain, peanuts, corn some are drought and died.

Farmers make a living from farming, and the most worrying thing about growing crops is natural disasters! Heze cotton suffered hail disasters, these are irresistible factors. For irresistible disasters, we should pay attention to the weather forecast at any time, take protective measures in advance, buy plastic film to cover the cotton tree, I think it is still necessary to take preventive measures in advance, and insurance should also be bought, because this is a force majeure factor, so insurance should pay.

If there is a chance, after a major disaster, drain the waterlogging ditches of crops in a timely manner, and help the cotton. If necessary, pay close attention to supplemental top dressing in order to obtain crop growth.

The reason why waterlogging is harmful to cotton is that waterlogging makes the soil hypoxic, so that the physiological metabolism of cotton roots is hindered. secondly, because waterlogging changes the physical and chemical properties of the soil, produces toxic and harmful substances, directly poisons cotton, and hinders the normal growth of cotton; Third, waterlogging destroys the original microbial flora structure of the soil, which indirectly affects the growth of cotton. Waterlogging damage hinders the growth of cotton roots, decreases vigor and weakens fertilizer absorption ability, which slows down the leaf emergence rate, hinders the expansion of leaf area, decreases chlorophyll content, and reduces photosynthesis intensity, which in turn affects crop yield. The longer the waterlogging lasts, the more severe the aforementioned hazards.

First of all, it is necessary to make full use of various drainage machinery to eliminate the water accumulation on the surface of the field; Secondly, it is necessary to rebuild a set of ditches in the field, clear the ditch and manage moisture, and reduce the soil moisture content; Third, it is necessary to storm the loosening of the soil, reduce the soil moisture, and quickly restore the original breathability of the soil.

If you have the opportunity, no matter how difficult it is, it is not difficult to give up, and the most important measure in the event of a flood is to drain the water.

When cotton encounters floods, what are the rescue methods for cotton when it encounters flooding?

Plants loosen the soil. The renovated farmland drainage provided the community with the aux and subsolage dou in time, and these plants aerated the cotton fields because of the economic losses suffered by sea buckthorn. Wait until the cotton field is slightly dry, do not waste time in cleaning up the soil and sedimentation, improve the soil aeration conditions, and promote the return of crops to normal physiology near the roots.

After <> cotton was hit by floods, the cotton grew relatively strong thanks to measures taken to delay the threshing by about a week to promote the growth of multiple autumn peaches. Clean up the "three ditches" in time to intercept the water in the cotton field, which is easy to cause hypoxia of the cotton root system, dyspnea and physiological disorders, resulting in the wilting or death of cotton plants. In order to make the cotton ready to recover its life as quickly as possible and reduce the shedding of flower buds, it is necessary to clean the drainage system in time, pump water if necessary, and speed up the emptying of stagnant water.

Reduce the groundwater level and promote the growth and development of cavernous roots.

After heavy rain, for flooded cotton plants, use a sprayer to pump water to clean the plants in time; When the cotton field ground is not dry or wet, allow time to straighten the cotton. Pay attention to gentleness, dexterity, and forward support, without or less damage to the roots, which is conducive to the recovery of cotton growth. After doing a good job of greening cotton plants, the soil should be loosened in time according to atmospheric and meteorological conditions, the soil aeration should be increased, the physical and chemical properties of the soil should be improved, and the recovery of cotton plants should be promoted.

For normal or well-growing cotton fields, in vigorous cotton fields, soil tillage should be carried out in combination with plants to avoid tipping over again.

After the cotton is flooded, the growth period will be greatly delayed, and the foliar fertilization must be timely, after flooding, the cotton will be harder and the later growth will be younger. The fourth generation of cotton bollworm and small drill and large-leaved cotton bollworm should pay attention to timely reproduction. The agent should be applied in a timely manner in a field with 100 plants and more than 150 second-instar larvae.

Cotton bollworm was sprayed with 50% Zhongbao, 40% methoxy and 20% methoxy solution 1500 2000 times; If using a Rotten Bell, do not waste time spraying: 100 Bordeaux or 800-1000 times carbendazim.

Answer]: 1. Support seedlings and loosen soil in time. After drainage, the lodging cotton plants are straightened and cultivated to improve the ventilation and light transmission conditions of the cotton field, so that the cotton can grow upright and reduce the loss caused by lodging and shedding; After the cotton field is slightly dried, the compacted layer should be broken as soon as possible to improve the soil aeration and restore the normal physiological function of the root system.

2. Appropriately postpone the topping time. After the cotton is waterlogged, it can be restored through remediation, and its growth stamina is greater, and the time of topping can be postponed for 5-10 days, so as to facilitate the cotton to shout more autumn peaches.

3. Scientific fertilization, striving for autumn peaches. The growth period of cotton is delayed after waterlogging, and foliar fertilization should be carried out in time to promote the recovery of cotton vitality. can be sprayed potassium dihydrogen phosphate and 2% urea mixture, 50-75 kg of fertilizer per mu; After the cotton recovers its vitality, 10-15 kg of diammonium phosphate, or 10 kg of urea (30 kg of ammonium bicarbonate) and 10-15 kg of superphosphate are applied per mu, and it is best to add 10 kg of potassium sulfate to accelerate the growth and development of cotton, and promote early and more autumn peaches.

4. Strengthen the prevention and control of pests and diseases. The affected cotton has greater stamina and tender growth in the later stage, which is suitable for the occurrence of four generations of cotton bollworm and cotton small bridge-building worm, and attention should be paid to the prevention and control of Zheng Chunshi in mid to late August. Where there are more than 8-10 larvae of more than two instars, pesticide control should be carried out immediately.

For the control of cotton bollworm, 20% methorb (also known as Wanling) 1500 times or pyrethroid pesticides 2500-3000 times liquid spray; The control of bridge-building insects can be sprayed with 40% monocrotophos 1500-2000 times. If there is a rotten imitation bell, you can spray Bordeaux solution or carbendazim suspension 800-1000 times in time.

5. Use ethephon to mature. Due to the late onset of the affected cotton, it mainly depends on the yield of autumn peaches, and if it is not sprayed in time to increase the proportion of ethephon to ripen and reduce the economic benefits. At noon on a sunny day in early October, 100-150 ml of ethephon can be used per mu, and 30-40 kg of water can be sprayed evenly to promote the early opening of cotton bolls and strive for more pre-frost flowers.

Cotton has a strong ability to regenerate, and generally after a hailstorm, it only needs to be managed tightly.

1) Timely cultivation of loose soil. After the hailstorm, it is necessary to carry out tillage and drying moisture as soon as possible to increase temperature and aeration, control dead seedlings, and promote early onset. Cotton fields in saline-alkali land should be loosened in time to prevent salt and dead seedlings.

2) Top application of fast-acting nitrogen fertilizer. Timely topdressing after the disaster can improve the nutritional status of cotton plants, restore the growth of Shanqing as soon as possible, and promote the growth and development in the later stage, so as to reduce the disaster loss.

3) Timely insect treatment. The branches and leaves germinated after the disaster are young and tender, and they are susceptible to aphids in the early stage and pests such as cotton bollworms in the later stage.

4) Scientific pruning. After the cotton plant recovers its growth after the disaster, it is easy to have many heads in front of the hall, which is not conducive to the bud and boll formation, and must be pruned reasonably; For cotton plants with intact apical cores, broken branches and leaves, it is necessary to remove the buds and crazy branches as soon as possible to ensure the growth of the apical core; For cotton plants where the top center is destroyed and only residual leaves and a small number of fruit branches are left, 1 2 large buds can be left in the upper part of the main stem to replace the top center for growth. After most of the new branches begin to bud, remove the invalid bud branches in time, and properly top early, and strive to make the cotton bear more effective bolls.

In order to reduce the damage of cotton waterlogging, the following measures can be taken:

1) Before the rainy season, the drainage facilities of the cotton fields should be sorted out as soon as possible, and the ditches should be dug deep to enhance the drainage and stain resistance.

2) In the event of heavy rain and flooding, it is necessary to rush to drain the open water and reduce the dark water in time to reduce the flooding time of cotton and remove the stain as soon as possible.

3) After the rainstorm and flood, the lodging cotton seedlings should be lifted in time, and the sludge on the leaves should be cleaned.

4) After the soil of the lead field is dry, it is necessary to loosen the soil in time, break the compaction, reduce moisture and aerate, and promote the development of the root system.

5) After the rainstorm and flood, the soil nutrient loss was serious, and the root system was damaged after the disaster, and the absorption function was reduced. After the disaster, it is necessary to grab the moisture and top dressing. At the same time, fertilizer is sprayed outside the roots to cultivate strong seedlings.

6) After the cotton field has passed through high humidity weather, some diseases and insects will occur and spread, and it is necessary to prevent and control them in time to reduce losses.

7) After the rainy season, it is necessary to strengthen the autumn tube, increase the application of flower boll fertilizer, reapply peach fertilizer, use sufficient fertilizer to make up for the loss of nutrients in the early stage and ensure the nutrient needs of the later increase of autumn peaches, increase the autumn peaches, and make up for the loss of the reduction of the peach.