What is the reason for the serious rot of crops and dead trees? How can it be improved?

Continuous cropping obstruction: root rot, dead trees, stiff seedlings, no rooting, low crop yield and poor quality caused by planting the same family or the same kind of crops on the same land for more than 2 years. Nutritional disorders:

The imbalance and abundance and shortage of large, medium and trace elements caused by long-term continuous cropping and unscientific fertilizer use are relatively serious, which immediately caused the situation of low crop yield and serious diseases. Soil-borne diseases: bacterial wilt, verticillium wilt, brown spot, leaf blight, standing blight, horn spot, soft rot and other pests and diseases caused by vine blight pathogens.

There is brown spot disease of the peach tree, leaf blight of cantaloupe, melon.

Soil delamination toxicity: Soil delamination toxicity caused by residues caused by the application of herbicides and chemical fertilizers and endotoxins metabolized by green plants can cause the decline of cultivated land in the soil layer, agglomeration, and the underdevelopment and senescence of crop rhizomes. Soil degradation:

The long-term unreasonable use of organic fertilizer leads to serious imbalance of water, fertilizer, gas, heat and soil microbial beneficial bacteria, phosphorus, potassium and its nutrients are more ineffective, soil colloids are destroyed, poor permeability, low use rate of organic fertilizer, and underdeveloped crop rhizomes.

Improve land quality: microbial bacteria are a group of living creatures, reproductive ability and metabolic ability are so strong, bacteria in the growth and development, breeding, death of the life cycle process, many dead bacteria in the soil produced many gaps, can long-term single use of organic fertilizer caused by soil degradation, promote the repair of soil colloids, reduce the damage of soil layer saline, improve the soil water retention, soil consolidation and air permeability performance.

Improve soil organic matter: Soil is the basis for the survival of green plants, but the soil layer is "fed" by organic fertilizer lower and lower. The application of bacterial fertilizer can improve the soil and improve the fertilizer efficiency.

For example, nitrogen-fixing bacteria can increase the origin of nutrients in the soil, and phosphorus and potassium bacteria can degrade insoluble phosphorus and potassium in the soil layer and chemical fertilizers, and release soluble phosphorus and potassium for plant adsorption.

Enhance the use rate of organic fertilizer and improve the quality of crops: According to the application of microbial fertilizer, the use rate of fertilizer can be increased, the amount of organic fertilizer can be reduced, land pollution can be alleviated, the cost of costs can be reduced, the protein, sugar and vitamin content of agricultural products can be improved, and the quality can be improved.

The first reason for rotten roots, in fact, the most important thing is that he does not water enough, the second point is to affirm that he has no viruses and pests and diseases, and the third point is to improve it, that is, it should be renovated in time.

It may be that there is too much water in the soil, it may be an infection of mold, or it may be an uneven distribution of trace elements. Be sure to loosen the soil in time and spray fungicides or insecticides.

It is the phenomenon of rotten roots, dead trees, stiff seedlings, no roots, low crop yield and poor quality caused by planting in the same plot for more than three consecutive years in the same family or the same crop. Stubble, also known as crop rotation, is to plant different crops every year, which can effectively avoid the obstacle of heavy cropping, resulting in major changes in the local planting structure.

Summary. There are many rotten roots of vegetables, especially in the seedling stage, which affects the normal growth of seedlings, and the main reasons for rotten roots are:

1) Low air temperature and ground temperature; (2) insufficient light; (3) The humidity in the nursery bed is large; (4) The seedbed is not easy to ventilate. As a result, the seedling growth is weakened, and it is easy to rot the roots, the general symptom is that the roots are rust-colored and rotten, and the seedlings grow slowly after they are unearthed without new roots, and some even stop growing, the leaf color is gray and green, and gradually turns yellow, causing the whole plant to wilt and die.

The general solutions are:

Increase the application of organic fertilizer, control the amount of watering, pay attention to ventilation, drainage and dehumidification, and apply rooting agents.

The vegetable seedlings rot the roots and slowly wither.

There are many rotten roots of vegetables, especially in the seedling stage, which affects the normal growth of seedlings, and the main reasons for rotten roots are: (1) low air temperature and ground temperature; (2) insufficient light; (3) The humidity in the nursery bed is large; (4) The seedbed is not easy to ventilate. Thus the disadvantages lead to the seedlings to be born and ruined and weakened, and it is easy to rot the roots, and the general symptoms are rust-colored rot of the roots, and the seedlings grow slowly after they are unearthed without new roots, and some even stop growing, the leaf color is gray and green, and gradually turns yellow, causing the whole plant to wilt and die.

The general solutions are: increasing organic fertilizer, controlling the amount of watering, paying attention to ventilation, draining and dehumidifying, and applying rooting agents.

I have an open field, every time I sow greens, amaranth, spinach, chrysanthemum and other vegetables, the seedlings are very good, but after a while, the seedlings will slowly turn yellow, wither, rot, and the roots will die like a slag. But the plot is good for growing cucumbers, pumpkins, green beans. What's going on?

Maybe this land is not suitable for growing greens, the roots of greens grow in the soil so they will rot, and the green beans and cucumbers are hanging on the branches, so they will not rot.

1. Insufficient light; 2. Watering too much; 3. The roots are not easy to ventilate, so as to lead to the growth of seedlings weakened, and it is easy to rot the roots, the general symptoms are rust-colored rot of the roots, and the seedlings grow slowly after being unearthed without new roots, and some even stop growing, the leaf color is gray and green, and gradually turns yellow, causing the whole plant to wilt and die. When there is too much rain, the cause of the phenomenon of root rot in crops is the lack of oxygen in the soil, and the roots carry out anaerobic respiration to produce alcohol, which has a toxic effect on root cells, which is called root rot. It is recommended to water when it is dry and wet, that is, it is dry and then watered.

The special environment of the shed causes the severity of the heavy stubble of the planting vegetables, and the continuous cropping and use of inferior chemical fertilizers by farmers and friends in the planting of vegetables cause salinization, compaction, soil-borne pests and diseases, acidity and alkalinization, and cause obstacles to the respiration of the root system of sparse vegetables. In the process of growth, plant roots, like other organisms, will also have a metabolic effect, and will discharge or produce many harmful substances, which will directly threaten the healthy development of the roots themselves. And the toxins in the soil accumulate more and more, if the heavy crop is planted, there will be underdeveloped root system, dwarf plants, slow growth phenomenon.

For such unfavorable situations that have occurred, they can only be alleviated by applying organic fertilizer, biological fertilizer, supplementing trace elements and applying growth regulators, etc., to alleviate the symptoms of these adverse effects The soil is serious and the root system is seriously damaged, mainly due to soil compaction acidification caused by unreasonable irrigation, lack of soil organic matter, and unreasonable use of fertilizer. Before planting, microbial inoculants or dimethylpyr can be used for root treatment, or microbial inoculants can also be applied after planting, such as Bacillus multiviscosus, Bacillus cereus jinggang, etc., or root irrigation treatment with methamethoxaline, etc., can well prevent soil-borne diseases caused by heavy cropping. The land is rotated, planted in a planned way, and different crops are cultivated alternately or in alternate years or two years.

Solving the problem from the root cause and avoiding continuous cropping of crops leads to the lack of a trace element in the soil and the excessive number of certain nutrients, which will cause a decline in crop yield and soil diseases. If the crop has symptoms of soil-borne virus during the growth period, the root is sterilized by chemical agents, and the diseased plant is burned in time to avoid greater losses caused by the spread of the virus.

<> has deep roots and lush leaves, and if there is no developed root system, the plant is weak in resistance and is easily infected with pests and diseases. In addition, it does not absorb nutrients from the soil well, resulting in lower yields. In particular, melons and eggplant vegetables that have been planted for a long time and have a large amount of melons are difficult to get good returns if the root system is poorly developed.

It should be removed, and it should be watered frequently, we should weed it often, and we should also have the ability to fertilize it, so that it can be prevented.

It is best to plant in rotation, if you must plant heavy crops, you can choose crops that are more resistant to heavy stubble for planting, improve the content of various nutrients in the soil, pay attention to the management of water and fertilizer, you can avoid rotten roots.

At this time, it is necessary to cut off these rotten roots in time, and do not continue planting, try to buy new ones, first of all, to observe the growth of these plants frequently, and also to water and fertilize.

For the field that has produced insect pests, we should pay attention to the implementation of crop rotation, intercropping, and intercropping as much as possible across crops, generally different plots are planted in rotation every 2-3 years, and it is best to enter 1 water and drought rotation every 2-3 years, such as rotating all kinds of eggplant vegetables and gramineous grain crops, such as tomatoes, peppers, eggplants and other eggplant crops and Chinese cabbage, cabbage, celery and other leafy vegetable crops, such as soybeans, kidney beans, cylinder beans, Legumes such as mung beans and underground tuber crops such as potatoes, sweet potatoes and radishes are rotated, for example, leafy vegetable crops with large nitrogen needs are rotated with legumes, such as acid-intolerant onions, ginger, garlic and acid-tolerant corn and pumpkin, etc., such as tomatoes and peppers, cucumbers and bitter gourds.

The best way to avoid replanting is to rotate planting, avoid heavy cropping, and choose heavy cropping tolerance as planting such as rice, sorghum, etc.

For heavy stubble areas, many people say that the use of underground organic fertilizer, medium and trace element fertilizer and appropriate supplemental microbial fertilizer is basically gone, but the reality is that many people follow the above methods to do, the plant is still rotten roots and dead trees are serious, why such a scientific and reasonable method is not effective?

In fact, for fertilization, many people ignore the element antagonism, although we also use trace element fertilizer, but due to the excessive use of nitrogen, phosphorus and potassium will lead to elemental antagonism, it is difficult for plants to absorb and utilize, plus there are few beneficial bacteria in the soil, the organic fertilizer applied can not be well decomposed and transformed, and the effect is not good, although we also apply a large number of beneficial bacterial fertilizers, but many bacterial fertilizers enter the soil and the activity is reduced, and it is difficult to play a role, so the effect is not good.

For greenhouse vegetables, how to supplement the beneficial bacterial fertilizer with high activity and high survival rate is one of the reasons to solve the heavy crop disease, now most of the bacterial fertilizer is made of amino acids as the substrate, and the nutrients added in the process of microbial reproduction are only for the survival of the fungus, but when it enters the soil due to the lack of nutrients, the activity will be reduced or even unable to survive.

Therefore, it is recommended that when we choose bacterial fertilizer, we choose to use corn, soybean meal and other grains as the substrate with nutrients with biological bacteria to fertilize, this kind of bacterial fertilizer into the soil because it is wrapped by thick nutrients, the survival rate of entering the soil is high, and the effect will be better.

Heavy cropping is a serious problem in agricultural cultivation, especially beans, melons and some vegetable varieties. Heavy cropping will cause problems such as aggravation of pests and diseases, and reduced yields.

What causes heavy stubble?

1. Enrichment of pathogens and pests in the soil. For the mass reproduction of harmful bacteria and pests that are not resistant to heavy crops, the aggravation of diseases and insect pests when crops are planted with heavy crops, and it is difficult to prevent and control.

2. Enrichment of root toxins. Crops compete with each other and release toxins through the root system, poisoning the roots of adjacent crops. After heavy cropping, toxins accumulate and damage the root system of crops, resulting in weak root system and slow plant growth.

3. The lack of single elements in the soil is mostly trace elements. Most crops that are not tolerant to heavy crops will have a strong demand for a single trace element. After heavy cropping, the single trace element in the soil is seriously deficient, resulting in severe nutrient deficiency symptoms and inability to grow normally.

Workarounds or mitigations:

1. Apply organic fertilizer. The organic matter in the organic fertilizer will release organic acids after being decomposed by soil microorganisms, and the organic acids have a certain decomposition effect on pesticide residues and root toxins in the soil. However, this method is only a relief, not an effective solution.

2. Soil testing and formula fertilization. The lack of trace elements in the soil can be known through soil testing and formula fertilization testing, and we can use and supplement trace elements rationally according to the measured data to achieve the balance of elements in the soil.

3. Soil disinfection. Soil disinfection to kill germs and pests in the soil is more suitable for greenhouse vegetable planting, which is a bit difficult to operate for field crops.

4. Reasonable crop rotation and stubble. Different crops can be planted per crop, reducing the lack of a single trace element in the soil. However, with the heavy use of herbicides in soil sealing, crop rotation or stubble reversal also seems to be somewhat difficult.

5. Fallow. Fallow is a way to restore soil fertility and reduce harmful germs and pests in the soil. By diversifying the biological environment between the aboveground and underground parts after fallowing, the number of pests and the increase of soil microorganisms can be reduced, and the number of diseases and pathogens can be reduced.

1. The application of straw bioreactor technology, in the reactor planting layer, the soil porosity of the 25 cm tillage layer is more than doubled, the beneficial microbial community increases, and the water, fertilizer, gas and heat are moderate, which has the effect of curing the root cause of soil continuous cropping obstacles in the protected area. 2. Soaking and disinfection, where conditions permit, can use the crop leisure season to soak the soil for about 20 days, which can significantly eliminate harmful bacteria and pests in the soil.