Crop growth and fertilization effects are closely related to weather conditions. Light affects the photosynthesis of crops, and the product of photosynthesis, sugar, is the energy source for root respiration. Insufficient energy affects the absorption of nutrients by roots. Therefore, under the condition of insufficient light, the absorption of nitrogen, phosphorus, potassium, calcium, magnesium, manganese and other elements is significantly reduced. Temperature affects both the conversion of fertilizers in the soil and the absorption of nutrients by crop roots.
For example, rice in mountainous areas is usually irrigated with low temperature water, and rice is prone to rice blast, which is caused by low temperature, which affects the absorption of silicon and potassium by rice. On the one hand, water can accelerate the dissolution of fertilizers and promote the absorption of nutrients by crops; on the other hand, if there is too much water, not only the soil is poorly ventilated, but also the nutrient absorption of unfavorable crops, and the loss of nutrients, so it is not suitable for fertilization in rainy days. Fertilization on sunny days should also determine the fertilization concentration according to the dry and wet conditions of the soil. If the soil is wet, the fertilizer can be used to concentrate; if the soil is dry, the fertilizer should be diluted and applied.
In the long-term production practice, people have summarized the fertilization predictions that may be caused by crops according to weather conditions. For example, in early spring and low temperature years, rice is prone to phosphorus deficiency and zinc deficiency. Pay attention to the use of phosphate fertilizer or zinc fertilizer. Under the condition of insufficient light, potassium fertilizer should be added to increase the utilization of light energy by crops. In dry years, rapeseed is easy to appear. Boron deficiency, Chinese cabbage, radish and other vegetables are prone to calcium deficiency, should pay attention to the use of boron fertilizer and calcium fertilizer; in the rainy season, it is easy to cause the loss of effective iron in the soil, fruit trees often appear iron deficiency, should pay attention to supplement.
For example, rice in mountainous areas is usually irrigated with low temperature water, and rice is prone to rice blast, which is caused by low temperature, which affects the absorption of silicon and potassium by rice. On the one hand, water can accelerate the dissolution of fertilizers and promote the absorption of nutrients by crops; on the other hand, if there is too much water, not only the soil is poorly ventilated, but also the nutrient absorption of unfavorable crops, and the loss of nutrients, so it is not suitable for fertilization in rainy days. Fertilization on sunny days should also determine the fertilization concentration according to the dry and wet conditions of the soil. If the soil is wet, the fertilizer can be used to concentrate; if the soil is dry, the fertilizer should be diluted and applied.
In the long-term production practice, people have summarized the fertilization predictions that may be caused by crops according to weather conditions. For example, in early spring and low temperature years, rice is prone to phosphorus deficiency and zinc deficiency. Pay attention to the use of phosphate fertilizer or zinc fertilizer. Under the condition of insufficient light, potassium fertilizer should be added to increase the utilization of light energy by crops. In dry years, rapeseed is easy to appear. Boron deficiency, Chinese cabbage, radish and other vegetables are prone to calcium deficiency, should pay attention to the use of boron fertilizer and calcium fertilizer; in the rainy season, it is easy to cause the loss of effective iron in the soil, fruit trees often appear iron deficiency, should pay attention to supplement.
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