Cultivating lotus in pots or cylinders can be done using pond mud rich in humus, which usually provides enough nutrients for the plant to grow, produce buds, bloom, and set seeds without the need for additional base fertilizer. However, if poor soil is used as a growing medium, it's necessary to enrich it with organic materials like cooked cake meal, bone meal, and other nutrients mixed in appropriate proportions with the soil. When fertilizing potted or cylindrical lotus, avoid over-fertilization, especially excessive base fertilizer, as this can damage or even kill young plants. If the water in the container turns green, bubbles appear, and the rhizome becomes hard and unyielding, it’s a sign of over-fertilization. In such cases, carefully remove the rhizomes, replace the soil, and replant. During the early stages of bud development, if leaves show yellowing due to chlorosis, apply 3-4 grams of high-quality compound fertilizer per pot, placing it in 3-4 spots in the soil to promote healthy growth. If the plant grows vigorously, with dark green foliage but delayed flowering, consider applying phosphate and potassium fertilizers, along with small amounts of boron and zinc to improve flower production.
Moisture management is crucial in lotus cultivation. During the seedling stage, maintain a shallow water level of 10–30 cm. As the plant enters its vigorous growth phase, increase the water depth to 20–40 cm to help regulate temperature. Too deep water may hinder branch formation and reduce the number of flowers. For potted or cylindrical lotus, keep the water level at 2–3 cm during the early growth stage. Once the leaves start to grow, gradually raise the water level to 5 cm. Ensure that fresh leaflets are protected and remove any water moss or algae promptly. Raising the soil temperature helps the leaves stand upright more quickly. As the leaves rise, the water level should be gradually increased. When 2–3 leaves have emerged, remove the old leaves and ensure the surface remains clean and well-ventilated. During hot seasons, water the plants 2–3 times daily, keeping the water level deep. Even during rain, make sure to drain excess water. If the lotus loses moisture, the leaf edges will quickly dry out, leading to loss of buds, which may take at least two weeks to recover. In autumn, as the plant slows down and enters dormancy, keep a small amount of water in the pot. When temperatures drop below 0°C, cover the pots with straw or similar material to protect them during winter.
Pest and disease management is essential for healthy lotus growth. Many diseases, especially in hot weather, can severely affect the plants. Common diseases include root rot, leaf spot, brown spot, and blight. Prevention is key. Practices such as selecting disease-resistant varieties, rotating crops, using organic fertilizers, and removing dead leaves can significantly reduce pest and disease problems. Increase phosphorus, potassium, and silicon content while reducing nitrogen fertilizer. Implement dry-wet rotations to minimize pathogen buildup. At the first signs of disease, spray the entire plant with a 600-fold solution of thiophanate-methyl or 50% carbendazim wettable powder, repeating every 7 days for 2–3 times for effective control. For anthracnose, use imidazole antiseptics like Torch at 1000–1500 times dilution, spraying 2–3 times to prevent further spread.
Insect pests such as Spodoptera litura (cutworm), leafhoppers, and cone caterpillars can harm lotus plants. To control Spodoptera litura, use low-toxic pesticides like Austrian Green No. 1 or Fengmao at 800 times dilution, spraying both the top and bottom of the leaves every 5 days for up to 3 times. Alternatively, use black light traps to capture adult moths. Leafhoppers, which mainly attack young leaves and seedlings, can be controlled with 90% trichlorfon at 1000 times dilution, applied through foliar sprays. Regular monitoring and timely intervention are key to maintaining healthy lotus plants.
Trolley Ultrasound Scanner,Color Doppler Ultrasound,Doppler Ultrasound Diagnostic Instrument,Trolley Full Digital Ultrasound Scanner
Mianyang United Ultrasound Electronics Co., Ltd , https://www.uniultrasonic.com