Nitrogen fertilizer is one of the frequently used fertilizers, and it is also one of the three macro elements that are indispensable for the healthy growth and development of crops and increase the yield. However, it is not that the more nitrogen fertilizers are used, the better. Many overnutritions can cause many harms. Today, the editor summarizes the harms and prevention methods of nitrogen fertilizers, and I hope to help you!
The harm of overuse of fertilizer
1. Applying too much nitrogen fertilizer will cause excess nitrogen in the soil. A large amount of nitrogen will form protein with more carbohydrates, and the remaining carbohydrates will be used as raw materials to form the cell wall, which will cause the cell wall of crops to become thinner, the tissue becomes weak, and the crops grow scared and the stems become thicker. The blade becomes larger and thinner, which is more brittle and easier to break.
2. The crops absorb a large amount of nitrogen, the leaves will be too fat and the plants will be closed, which will reduce the ability of ventilation and light transmission, resulting in the decline of the light energy utilization rate of the crop groups, and the strong respiration of the crops will increase the consumption of photosynthetic products. Material accumulation declined, leading to reduced production.
3. Applying too much nitrogen fertilizer reduces the ability of crops to resist stress, and is extremely susceptible to diseases and insect pests and suffering from freezing damage, especially vulnerable to virus infection. Gum disease
4. Excessive application of nitrogen fertilizer will reduce the absorption of phosphorus, potassium and trace elements, causing slower fruit maturity, incorrect color, and deformed fruit, resulting in a decline in the rate of flower bud differentiation, excessive nutrient growth, and a relatively low fruit setting rate. Will not set fruit.
5. Using a large amount of nitrogen fertilizer, the water-soluble nitrogen content of the soil will be relatively high, and it is easily converted into ammonia or nitric acid gas, which is continuously released from the soil into the growth environment of crops, resulting in ammonia or nitric acid gas poisoning.
6. The application of a large amount of nitrogen fertilizer will also increase the acidification and salinization of the soil, resulting in a significant decrease in nutrients such as calcium and magnesium in the fruit, and usually cause calcium and magnesium deficiency symptoms.
Prevention of excessive nitrogen fertilizer
1. To control the amount of nitrogen fertilizer, it should be applied in batches.
2. Increase the application of organic fertilizers to improve the fertility retention capacity of the soil and increase the buffering properties of the soil. Because organic fertilizer has a strong adsorption capacity for cations in the soil, it can greatly reduce the occurrence of fertilizer damage.
3. Do not splash on the leaves when fertilizing, especially when there is dew, do not sprinkle at will to avoid burns.