How to Solve the Problem of Rotten Roots in Vegetable Nursery

How to Prevent and Treat Rotten Roots in Vegetable Seedlings Growing healthy seedlings is the key to successful vegetable farming. Weak or diseased seedlings can significantly reduce both the quality and yield of your crops. One common problem during the seedling stage is root rot, which can severely hinder plant development. This issue often occurs due to low temperatures, especially in winter and early spring, combined with insufficient light, high humidity, and poor ventilation in the nursery. During cold spells or heavy rain, it's even harder to maintain proper air circulation, leading to weak, unhealthy seedlings. The symptoms of root rot typically include brown, soft roots, slow growth after emergence, and the absence of new root development. Leaves may turn grayish green and eventually yellow, causing the entire plant to wilt. To prevent and manage this issue effectively, follow these essential steps: First, improve soil fertility by adding organic matter. Decomposed organic fertilizers, particularly hot manure, can enhance seedling resilience and raise the temperature of the seedbed, reducing disease incidence. Before planting, mix finely crushed hot manure with the soil in a 5:1 ratio. Avoid using too much nitrogen-based fertilizer as a base. Make sure the organic material is fully decomposed, and consider using a microbial starter like Golden Fish Starter to avoid damaging the seedlings or losing nutrients. Second, focus on insulation. Cover the beds with straw, mats, or blankets at night to protect against cold. If necessary, use heating systems to keep the soil warm. For example, melon seedlings should not be exposed to temperatures below 12°C, while eggplants require at least 9–10°C. After sowing, gradually increase the temperature inside the seedbed and then slowly lower it as the seedlings emerge. Maintain daytime temperatures between 20–25°C and nighttime temperatures between 12–15°C. As seedlings grow, adjust temperatures according to each vegetable’s needs, ensuring a proper day-night temperature difference. About 10 days before transplanting, acclimate the seedlings to outdoor conditions. In colder areas, electric heating cables can help maintain soil warmth. Alternatively, use fermented materials in the greenhouse for natural heat generation, which also turns into valuable organic fertilizer. Third, control watering carefully. In greenhouses or shelters, water only when the topsoil is dry but not crusted. When watering, avoid over-saturation to prevent root rot. Fourth, ensure proper ventilation. Once the cotyledons open, choose a sunny, warm day to remove the cover slightly and allow airflow. Spread a thin layer of dry soil over the seedbed before re-covering. This helps lower humidity and provides a slight warming effect. Fifth, apply a root-promoting agent. Using beneficial microorganisms or specialized products can improve the root environment, promote germination, and strengthen weak seedlings. Products like Jinbao Rooting Agent offer both prevention and treatment benefits. Here’s how to use it: - **For seedbeds**: Mix 50ml of the product with 10–20 times water and blend it into 50kg of nutrient-rich soil or 4–5m² of seedbed. This promotes quick germination and uniform emergence, reducing weak seedlings. - **During the seedling stage (after two true leaves)**: Dilute the product 30 times and apply 5–10kg per square meter. It encourages strong root development, increases lateral roots, and improves overall plant health. For more details, visit the official website or contact us directly. Website: [www.152.com](http://www.152.com) Address: No. 12 Zhongguancun South Street, Beijing 100081 Phone: 81428238

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