After temperature management is completed, the seedlings will be covered with a closed insulation system following planting to promote healthy growth. The conditions are maintained using small arches and two layers of curtains to create a high-temperature and high-humidity environment. About one week after planting, the plants begin to grow vigorously. Once the seedlings have acclimated, ventilation is introduced during the day when temperatures exceed 30°C, while reducing air flow when the temperature drops to 25°C. At night, the temperature should be kept above 20°C, ideally around 15°C, and no lower than 10°C in the early morning. In case of cold weather, auxiliary heating equipment must be available to maintain optimal conditions.
Light management is crucial for eggplants, especially during seasons with low light intensity. Reflective screens should be placed behind the greenhouse to enhance light exposure and increase both light intensity and temperature. However, seedlings close to the light curtain may wilt, so timely watering is essential. On cloudy days, it's important to expose the plants to sunlight as much as possible, and the greenhouse film should be cleaned regularly to maintain light transmission.
Water and fertilizer management plays a key role in the growth of eggplants. After planting, watering is typically not required until the fruit begins to set. Watering should be done based on the weather forecast, ensuring that water is applied at least two days after a sunny day, preferably before 10:00 AM. Under-membrane irrigation is recommended to reduce air humidity. Depending on plant growth, if leaves are large and thin, and the first branches are closely spaced, watering can be delayed by one day. Conversely, if the plants are short and fruits develop quickly, frequent watering is necessary. When the eggplant starts to expand, top-dressing should be applied using 25 kg of San Yuan compound fertilizer per 667 square meters, dissolved in water. After harvesting, the soil becomes compacted, reducing aeration and water infiltration. To improve this, the soil should be loosened with a fork without turning or breaking the clods. A small amount of potassium dihydrogen phosphate, urea, and potassium sulfate (50 grams each) should be applied to loose ridges, followed by sufficient watering. This process should be repeated about four times throughout the growing season, increasing yield by approximately 200 kg per 667 square meters. The use of carbon dioxide gas fertilizer has proven effective in boosting yields for winter and spring eggplant production.
Plant adjustment is vital for managing challenges in winter and spring eggplant cultivation, such as high humidity, low ground temperature, and poor ventilation. By adjusting the plants, humidity can be reduced, ground temperature increased, and excessive leggy growth limited. This helps balance vegetative and reproductive growth.
Fruit adjustment involves removing excess fruits to prevent overloading the plant. If an inflorescence only bears one fruit, it should be removed promptly if the plant shows signs of stunted growth. If the plant grows too vigorously, fruit harvesting should be controlled within 1–2 days.
In the early stages of leaf development, at least four functional leaves should be retained. After flowering, one leaf should be left below each bud, and all lower leaves should be removed. After harvest, one leaf should remain under the fruit, and the rest of the lower leaves should be pruned. Monitoring the plant’s growth and canopy density ensures some light reaches the ground, which helps regulate temperature and humidity. Too few leaves can reduce photosynthesis and affect yield.
Pruning in winter and spring sun-greenhouse eggplants typically involves double pruning and shaping. Side branches are trimmed to leave two leaves per fruit, while fruitless branches are opened up. This process is repeated to manage the growth of side shoots. For octagonal branches, only two branches are allowed to grow, ensuring balanced development.
Manual Video Measuring Machine
Manual vision measuring machine is a precision measurement instrument that uses manual driving for 3 axes, and the measurement software is manual point taking.
This instrument uses a zoom objective to magnify the measured object, and the image is input into a computer through a CCD industrial camera device. The enlarged image of the measured object is transmitted to the measurement software for non-contact and efficient geometric measurement of various complex workpieces.
Suitable for non-contact measurement of stamped parts, plastic parts, thin film shaped, easily deformed, easily damaged, and small-sized workpieces, such as workpiece measurement in industries such as rubber, plastic, small hardware, clocks, and light industry.Video Device
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The vision measuring machine consists of three parts: an image acquisition device, a data acquisition device, and a two-dimensional measurement software. The zoom objective lens and high-resolution color camera form an image acquisition device, and the data acquisition device is composed of a grating ruler and a data processor. The image and data are measured using 2D measurement software to achieve point, line, arc, and distance measurements.
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