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Spread vegetables and fertilizers to endanger temperature
With the continuous advancement of high-efficiency agriculture, greenhouse vegetable cultivation has experienced significant growth. However, many farmers still rely on outdated or improper fertilization techniques, which can cause serious harm to their crops. A common mistake is simply spreading fertilizer over the soil surface without proper application methods. This practice not only reduces fertilizer efficiency but also leads to a range of negative consequences that can damage or even destroy entire greenhouse crops.
One major issue is ammonia toxicity. When nitrogen-based fertilizers or compound fertilizers are scattered on the soil surface, they react quickly with moisture and decompose under high temperatures, releasing ammonia gas. In a closed greenhouse environment, this gas cannot escape easily, causing its concentration to rise rapidly. For example, in tomatoes and cucumbers, concentrations as low as 510-6 ppm can be harmful after 15 hours, while 4010-6 ppm may cause damage within just a few hours. This can lead to severe crop loss or even total failure.
Another problem is increased soil salinity. Greenhouses often have limited rainfall and high evaporation rates, which prevent salts from being washed away. When fertilizers are applied on the surface, the salts tend to accumulate in the top layer of the soil, making it increasingly difficult for plants to absorb water and nutrients. Over time, this salinity buildup becomes a major obstacle to successful greenhouse farming.
Additionally, surface fertilization hinders root development. Vegetable roots naturally grow toward areas with more nutrients. However, when fertilizers are spread on the surface, the roots tend to stay near the top, where they are more exposed to salt damage. This weakens the root system and limits the plant's ability to take up water and minerals, ultimately affecting overall growth and yield.
To address these issues, it's crucial for farmers to adopt better fertilization practices. Instead of scattering fertilizer, they should apply it deeper into the soil and then cover it with a layer of earth. This helps reduce ammonia release, prevents salt accumulation, and encourages healthier root growth. Additionally, regular irrigation can help flush out excess salts, improving both soil quality and fertilizer efficiency.
By making these simple adjustments, greenhouse farmers can significantly improve their crop health, increase yields, and ensure more sustainable agricultural practices. It's time to move away from old habits and embrace modern, science-backed techniques for better results.
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