In the cultivation of peppers in the solar greenhouse, the most troublesome thing is that the peppers are not planted after the planting, the dead trees or the plants are wilting. What are the reasons for these, and how to prevent it?
First, the field symptoms
After the pepper is planted, the wilting plants appear in the field. The main performance is that the seedlings are long; the plants are weak; the leaves are yellow; and the wilting occurs on sunny days. The reasons are mainly the following:
1. The planting is too deep. Some farmers may consider watering after planting, fearing that the water will wash down the seedlings, and almost one-third of the stalks are buried in the soil. Due to high temperature and high humidity, the stems become brown. Even rotten, but this is not a disease and cannot be prevented by spraying.
2. The adaptation process of seedling seedlings. Since the seedlings before planting have adapted to the soil environment of the seedbed, it is necessary to have a certain time to adapt to the soil environment in the arch shed after the planting, which causes the lengthening of the seedlings to be lengthened.
3. The planting time is too early, causing the root cause. Because most of the vegetable farmers did not take ridges and colonization, and most of them adopt the method of flooding with large water, the permeability is not good, resulting in roots. When the wilted seedlings are pulled out, it can be clearly seen that some of the capillary roots have been necrotic, and the remaining roots are insufficient to maintain the nutrients and moisture required for their normal growth. When the temperature is high on a sunny day, the amount of transpiration of the plant is large, and the water required is large, so the wilting phenomenon occurs.
4, improper use of farmyard fertilizer caused by burning roots. The application of high-quality agricultural fertilizer in greenhouse is the basis for high-quality and high-yield vegetables, and it is also the most effective measure to prevent and alleviate the obstacles in greenhouse soil continuous cropping. However, if the unfertilized agricultural fertilizer, or the agricultural fertilizer is not applied to the ground, or the agricultural fertilizer is not applied deeply, or the amount of agricultural fertilizer is too much, the decomposition will cause high temperature around the root system or the soil solution concentration is too high, forcibly from the root of the plant. Ask for the main root of water burns, affecting root development and causing wilting.
Second, preventive measures
On how to solve problems such as deep planting, it is possible to improve the field management techniques and dig a small tool around the seedlings to expose the stems buried in the soil to the soil. Appropriately increase soil permeability, avoid rotten stalks, and cause dead trees.
Third, in order to effectively solve the "fat damage" problem, we must pay attention to the following four points:
1. Fully decomposed. The farmyard manure must be fully decomposed and treated in a harmless manner before entering the greenhouse. It is strictly forbidden to enter the shed into the ground. When stacking rot, it is necessary to turn off the humidity, seal off, and turn over, so as to kill germs, eggs, and grass seeds, and reduce pests and diseases.
2, fine, sieved. The fertilized agricultural fertilizer should be finely sifted and sieved. Otherwise, the new roots that have just been planted after the planting will cause burns. The lighter ones will affect the development and cause “small old seedlingsâ€. In severe cases, it will cause wilting or even death.
3. Deep application. After the fertilizer is applied, it must be deep and mixed.
4, the right amount of fertilization. The amount of agricultural fertilizer is not as high as possible, and excessive application is also prone to root burning problems.
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