First, the causes of burning root
1. Organic fertilizer is not cooked. In the process of fertilization, unrefined organic fertilizer, especially unfammified livestock manure, releases a lot of heat when it is fermented in the soil. When the fermentation site is closer to the root system or the crop plants are smaller, the heat produced by the fermentation will be Affects the normal growth of roots, causes burning of roots, and in severe cases can lead to plant death.
2. Fertilizer concentration in the soil is too large. If there is too much one-time fertilization, uneven fertilization, or insufficient water supply after fertilization, the concentration of soil solution or the concentration of local soil solution will increase, causing root water to flow backwards, resulting in water loss in roots and burning root symptoms.
Second, preventive measures
1. Apply a sufficiently mature organic fertilizer. Regardless of the basic application or topdressing, the organic fertilizer must be fully decomposed, especially the livestock manure, if it is not fully cooked and prone to burning roots, it may become the source of infestation of diseases and pests, resulting in the occurrence of pests and diseases.
2. Scientific application of chemical fertilizers. When applying chemical fertilizers, scientific fertilization must be carried out in accordance with the instructions for the application of chemical fertilizers. It is not possible to apply too much fertilizer at one time so as not to cause burning of roots.
3. Do not fertilize too close to the root system. When fertilizing, it is generally about 10 centimeters from the root, do not get too close to the root system, let alone the fertilizer directly contact the root system, so as not to cause root burning.
Third, the remedial measures Once burned roots can take the following measures to remedy.
1. Reasonably water. For greenhouse cucumbers, if the soil moisture is not high, the concentration of soil solution can be reduced by watering on sunny days to mitigate the hazard. When watering, some functional fertilizers that promote rooting can be applied to accelerate the germination of new roots and enhance the growth of seedlings. Pay attention to when watering should not be too large, to be hard-ground water, so as not to water too much, causing the roots of the roots, increasing harm.
2. Leaf spray fertilizer. Since root absorption ability of cucumber after burning roots is affected, foliar fertilizer application, such as spraying of chitin + cytokinin + potassium dihydrogen phosphate, supplements foliar nutrition to relieve root injury and reduce absorptive capacity. The lack of symptoms caused by the disease, thereby enhancing plant resistance, so that the plant quickly returned to growth.
3. Pharmaceutical irrigate root. After the cucumber is burned, it is easy to be infected by soil-borne diseases. Therefore, fungicides can be used to irrigate the roots to prevent soil-borne diseases from infecting the injured roots, resulting in rot and dead trees.
4. The correct application of biological bacteria fertilizer. After burning the roots of cucumber, do not rush to apply biological bacterial fertilizers, especially fermentative bacteria, so as not to cause rapid liberation of manure heat, exacerbating the harm caused by burning roots. Cucumber fertilizer should be applied only after normal growth of cucumbers has resumed.
5. Clear the seriously ill plants. For severely burned roots, plants are wilting and dead, and plants that do not return to normal growth should be removed promptly.
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