Pepper is a vegetable that is warm and moist and sensitive to fertilizer and water. When the ecological environment is suitable, both vegetative and reproductive growth will be carried out according to normal developmental stages. In the process of pepper growth, when the ecological conditions change, there are often abnormal phenomena such as easing seedlings, stiff seedlings, wilting, and flowering and fruit falling, which are often referred to as physiological obstacles. There are many factors that cause physiological disorders. In addition to ecological factors such as temperature, light, and gas, the most common one is the imbalance of fertilizer and water.
In terms of fertilizers, one is to apply too much nitrogen fertilizer in the protection zone, nitric acid formed by decomposition of nitrogen fertilizer to acidify the soil, and second, excessive use of urea, easy to produce nitrogen dioxide gas, when the concentration is 3 mg / l, the pepper can be victimized; The third is the use of organic fertilizers that are not fully decomposed, but also prone to toxic gases. Fourth, the application of high concentrations of water excrement at high temperatures can easily cause the roots of peppers to burn, the lighter ones to drop and fruit drop, and the worst ones to die; The lack of certain nutrient elements in the soil makes the pepper “green†and “greenâ€, or the plant's vegetative organs are deformed. Sixthly, when the nutrient status is poor, more short-pillar flowers are formed, pollen cannot grow and spread normally, and the pistil cannot be fertilized normally.
In terms of moisture, first, the temperature of the seedling soil on a rainy day is low, the soil is compacted, and the seedlings are easy to be stale. Second, when the soil moisture is insufficient and the air is dry, the seedlings are easily planted and the pepper petiole is easily bent and the leaves are drooped; After the rain, it was difficult to drain water, the soil was poorly ventilated, the roots were anaerobicly respired, there was too much accumulation of toxic substances, and when the weather was clear and bright, the peppers were dead; the fourth was that the irrigation of the peppers before the fruit set would reduce the soil temperature, causing leggy and delaying the fruiting time. Reduce production.
Therefore, in order to promote the normal and steady growth of peppers, it is necessary to optimize fertilizer and water management measures and increase the level of scientific utilization of fertilizer and water.
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