Among the hot pepper cultivation in the solar greenhouse, the most troublesome are the problems such as no seedlings, dead trees or wilting after the peppers are planted. What are the reasons for these, and how can they be prevented?
1. Field symptoms
Wilting plants appear in the field after the pepper is planted. The main manifestations are long time to slow seedlings; weak plants; yellow leaves; wilting on sunny days. The reasons are mainly the following:
1. Planting is too deep. Some farmers may take into account the need for watering after planting, afraid that the water will overwhelm the seedlings, and almost one third of the stalks are buried in the soil. Due to the high temperature and high humidity, the stalks become brown. Even rot, but this is not a disease and cannot be prevented by spraying.
2. The adaptation process of seedlings. Because the seedlings have adapted to the soil environment of the seedbed before planting, because the soil has been changed after planting, there must be a certain time to adapt to the soil environment in the arch shed, which results in a longer time for slow seedlings.
3. The planting time is too early, resulting in the phenomenon of rooting. Because most vegetable farmers did not adopt ridge planting, and most of them adopted flood irrigation, the air permeability was not good, which caused the roots. When the wilted seedlings are pulled out, it can be clearly seen that some capillary roots have been necrotic, and the remaining root system is not enough to maintain the nutrients and water needed for its normal growth. On sunny days, the temperature is high, the plant transpiration is large, and the required water is large, so it will wither.
4. Root burning caused by improper use of farm manure. The application of high-quality agricultural fertilizer in the greenhouse is the basis of high-quality and high-yield vegetables, and it is also the most effective measure to prevent and alleviate the obstacles of continuous cropping of soil in the greenhouse. However, the application of unfermented agricultural fertilizers, or the application of agricultural fertilizers into the ground, or the application of agricultural fertilizers, or excessive application of agricultural fertilizers, will cause high temperatures around the root system or excessively high soil solution concentration during decomposition, forcibly removing from the plant roots Ask for water to burn the main root, which affects root development and wilting.
Preventive measures
Regarding how to solve problems such as excessive planting, field management techniques can be improved, and small tools are used to dig around the seedlings to expose the stems buried in the soil. Properly increase soil permeability to avoid rotten stalks and cause dead trees.
3. In order to effectively solve the "fertility" problem, we must pay attention to the following four points:
1. Fully rotten. Farm manure must be fully decomposed and harmless before entering the greenhouse. It is strictly forbidden to enter the ground with raw manure. When composting, the humidity should be closed, sealed off, and turned over. This will kill germs, eggs, grass seeds, and reduce the harm of pests.
2. Thin and sifted. The rotten agricultural fertilizer should be thin and sieved, otherwise it will cause burns on the new roots just after planting. The lighter ones will affect the development and cause “small old seedlingsâ€, and the severer ones will wither and even die.
3. Deep application. After applying the fertilizer, be sure to dig deep and mix well.
4. Appropriate amount of fertilizer. The amount of agricultural fertilizer is not as much as possible, and excessive application is also prone to root burning problems.
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