In the summer, temperature management is crucial for healthy vegetable growth. High temperatures, especially at night, can cause vegetables to grow too quickly and become weak, which is not ideal for cultivating strong plants. Therefore, controlling the temperature is an essential technique in vegetable farming. For summer crops, greenhouses often exceed 40°C, which can hinder normal plant development. To combat this, it's important to increase ventilation and use shading nets or cooling agents. Additionally, creating a larger temperature difference between day and night helps prevent excessive growth.
Moisture control is another key factor in summer vegetable cultivation. Soil moisture is essential for plant growth, but overwatering can lead to weak, leggy plants. It’s best to combine large and small waterings to meet the plants’ needs while also helping to lower greenhouse temperatures. Watering should be avoided during the hottest part of the day—ideally done before 10:00 AM or after 4:00 PM. Different vegetables have different water requirements; for example, melon crops need more water, while some plants prefer drier conditions. Adjusting watering based on the specific needs of each crop ensures better growth and prevents root issues.
Nutrient management plays a vital role in summer farming. High ground temperatures and poor soil aeration in flat planting systems can hinder root development. To improve soil quality, bio-fertilizers can be applied during planting to enhance root health and overall plant resilience. For weaker plants, applying chitin or biological fertilizers can help promote stronger growth and increase disease resistance.
Disease prevention is also critical during the summer months. High humidity and heat create favorable conditions for pests and diseases. To reduce infestations, installing insect nets on vents can prevent pests from entering the greenhouse. Early intervention is key—spraying protective solutions before symptoms appear can effectively manage common issues like fungal infections, viral diseases, and bacterial leaf spots. For example, using a 77.2% Bordeaux mixture diluted 600 times, a virus control solution mixed with Ningxia at 500 times, or a 47% Garrinone WP solution diluted 600 times can all help prevent and control these problems. (Gansu Science and Technology News - Xue Yuxia)
By carefully managing temperature, moisture, nutrients, and disease, farmers can ensure healthier, stronger crops even in the most challenging summer conditions.
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