Experts: Within a certain range, the higher the temperature, the faster the decomposition and transformation of soil organic matter, and the stronger the ability of crops to absorb nutrients. For example, after urea Application, it takes 7-10 days to be effective at 10°C, and it can be effective for 4-5 days at 20°C. Therefore, early spring fertilizer in cold regions should be properly applied. It is best to use quick-acting fertilizers such as nitrate nitrogen and ammonium nitrogen.
Reporter: What is the relationship between light and fertilization?
Experts: Illumination affects photosynthesis and crop absorption and utilization of nutrients. Under conditions of insufficient light, more nitrogen and potassium deficiency, crops are prone to lodging and infection of pests and diseases.
Reporter: Please talk about the impact of precipitation and irrigation conditions on fertilization.
Experts: Fertilizer nutrients dissolved in water can be absorbed and utilized by crops. Soil moisture can also regulate soil ventilation. Therefore, when the weather is dry, the fertilizer is difficult to apply and play a role, but too much rain or irrigation is not good, it is easy to cause loss of soil nutrients. In the long-term accumulation of water conditions, it will also produce harmful substances, causing rot, so it is necessary to promptly drain it after a heavy rain and make appropriate supplements.
Reporter: The climate conditions in various parts of China are very different. What problems should be paid attention to when fertilizing?
Experts: Regional climate differences are a comprehensive reflection of temperature, light, and precipitation conditions. In a weather-swept year or region, the amount of fertilizer can be appropriately increased to give full play to the potential for increasing fertilizer production.
Reporter: Mr. Guo of Fuyang, Anhui Province, said that by the end of last year, there had been little rain, and some wheat suffered freezing damage. What should I do?
Experts: If there are irrigation conditions, you can lightly water once the weather is warm at noon or after noon. If there are signs of lack of fertilizer, it can also be combined with irrigation nitrogen fertilizer, but due to weak wheat root activity, fertilizer can not be too large, 5 kg of urea per acre can be. If the ground is not flat before sowing, it will also occur in places where irrigation is not possible. Therefore, the quality of soil preparation must be improved.
Reporter: Mr. Chen from Wuchang, Hubei Province asked what his family's rice fields are.
Experts: Rice bran canola is prone to water, poor ventilation, low soil temperature, affecting the growth of rapeseed roots and absorption of nutrients, so do not love long. The main solution is to strengthen the trenching or drainage. On this basis, properly soiling or applying a single fertilizer is also effective for antifreeze and strong seedlings.
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