One is to increase organic fertilizer. The application of organic fertilizer can not only provide nutrients directly and effectively to crops, but also is beneficial to the growth of crops under low temperature conditions. When fertilizing, it is best to apply the fermented manure directly to the root of the crop or as a base fertilizer; it is also possible to take the fermented manure to the shed to raise the temperature, and use a watering can to put a small amount of hot water (but the temperature should not be too high). After the plastic cover is warmed, the nutrients are activated before the application of nutrients, so that through the temperature and lighting of the greenhouse, it can not only achieve long-term fertilization but also increase the temperature, so that the root vitality can be enhanced.
The second is less nitrogen fertilizer. If you need to apply, apply less, phased application. From the standpoint of nitrogen nutrition, it is best to apply some available nitrogen fertilizer to top-dressing crops. Under low temperature conditions, nitrogen fertilizer is more suitable for leguminous crops and can be applied more than other crops, which can reduce the freezing damage to legume crops.
The third is to increase phosphorus and potassium fertilizers. Under low-temperature conditions, greenhouse fertilizers should be increased by applying phosphorus and potassium fertilizers as seed fertilizers. Effective phosphorus can prevent crop cold damage, increase crop resistance, and coordinate crop growth. Organic fertilizers can also be used in combination with phosphorus and potassium fertilizers as seed fertilizers. , anti-low temperature effect is better.
The fourth is the rational application of quick-effect compound fertilizer. The use of fast-acting compound fertilizers in greenhouses can effectively and timely supplement and release nitrogen, phosphorus and potassium nutrients required by crops, promote robust crop growth, thereby resisting low-temperature freezing damage, meeting and coordinating the needs of crops for nutrients and temperature, and promoting crop growth. Base fertilizer and seed fertilizer can be used when applying.
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