Shade net summer and autumn celery cultivation

Planting Seedlings 1. **Sowing Period** The best time to sow celery seeds is in mid-June, with a seedling age of approximately 40 days. Shortening the seedling period slightly can improve survival rates after transplanting and speed up growth. 2. **Seed Soaking and Germination** Since celery prefers cooler conditions, it's important to use low-temperature germination during hot seasons. Soak the seeds in fresh water for 12 hours, then mix with 90% or more of a germination promoter. Let them soak for another 12 hours. After washing and draining, place the swollen seeds in a damp cloth bag and put them in the refrigerator for 3–5 days at around 7°C. Stir them once daily. When about 30% of the seeds have sprouted, they are ready to be sown. 3. **Preparing the Seedbed** Choose a plot that hasn’t been used for celery before. Apply decomposed farmyard manure as a base fertilizer seven days in advance. Disinfect the soil with mancozeb or thiophanate at a rate of 1.5 g/m². For an 80 square meter area, use about 150 grams of seeds. 4. **Sowing and Shade Protection** Evenly spread the white seeds on the seedbed and cover them with 2 cm of brown ash or well-decomposed pig manure. Then install a shade shed, covering it with two layers of shade net and a plastic sheet. The shed should be about 1 meter high to protect against storms and provide cooling. Water the seedbed once in the morning and once in the evening to keep it moist and help the seedlings emerge. Planting and Management 1. **Transplanting and Base Fertilization** When the seedlings are around 38 days old, they are ready for transplanting. Start by planting larger seedlings, followed by smaller ones. Before planting, apply 4,000–5,000 kg of compost per mu (approx. 667 m²) along with some phosphorus and potassium fertilizer. If using plant ash, apply it after planting, which helps the plants establish better. Using early maturing plant ash at a rate of 1 hen per 20 square meters can increase yield by 15%. Due to rapid growth in high temperatures, you can slightly increase planting density. Typically, space plants 10 cm apart within rows and 15 cm between rows, placing 6–8 seedlings per hole. 2. **Shading and Care** Immediately after transplanting, cover the area with a shade net. Adjust the height of the shed for easier management. Space each net 50 cm apart to allow more direct light. During dry periods, water the plants carefully without flooding to support growth. No need to remove the shade during coverage. Apply fertilizers like urea or human waste during the mid-growth stage, and apply 15 kg of potassium chloride in the later stages to significantly increase individual plant weight. 3. **Micro-fertilizer and Growth Regulator Use** Celery is very sensitive to boron, especially under high-temperature conditions. Spray 0.1% boric acid and 0.1% superphosphate extract 2–3 times during the growing season to prevent leaf stem cracking and late yellowing, promoting healthy growth. Additionally, use foliar fertilizers such as "Sprayer Surface Treasure" and "Fertilizer Treasure." Spray gibberellin at a concentration of 100 mg/kg 10–12 days before harvest to boost yield and improve quality. Pest Control Common pests include early blight, leaf spot, and locusts. At the onset of disease, spray a 75% chlorothalonil solution diluted 600 times, or use 0.1% sulfur powder mixed with a 1:0.5:200 Bordeaux mixture. Apply 30–40 kg per mu, repeating every 7 days for 2–3 times. For insect pests, add a 0.4% acaricide solution diluted 400–600 times with 0.1% detergent, or use a 50% dichlorvos solution diluted 500–600 times. Regular monitoring and timely treatment are essential for a healthy crop.

Potassium Phosphates

Potassium Phosphates,Tricalcium Phosphate,Tripotassium Phosphate,Trimagnesium Phosphate

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