Key points of celery planting in solar greenhouse

I. Variety selection

You should choose varieties that are tall and erect, with compact leaf clusters, enlarged leaves, solid, qualitative and sweet, few fibers, strong resistance to stress, wide adaptability, and late pumping in early spring.

Second, seedling transplanting

Celery is mostly transplanted with seedlings and can be sown from early to mid-October. The calendar seedling age for winter and spring celery in the greenhouse is 60 to 70 days.

1. Prepare the ground

Make a flat rafter with a width of 1.0 to 1.2 m. The day before sowing, the seedbed was irrigated with bottom water, and after the water penetrated, fine soil was sprinkled on the surface of the seedbed. Use fine sand and seed j to spread evenly on the seedbed, cover the soil 0.5cm thick, cover with a thin film, and remove the film when the seedlings reach 60%.

2. Seedling management

After emergence, weeding and weeding in time, the temperature should be kept at 15 ~ 20aC, suitable after emergence! The temperature is not higher than 20C during the day and not lower than 8 ℃ at night. To prevent seedlings from springing in spring, the night temperature must be controlled above 8 ° C to prevent frost damage. Before planting, it is necessary to strengthen the ventilation and seedling cultivation during the day and time, so that the night temperature is gradually reduced to about 0 ° C to improve the adaptability after planting.

Third, colonization

When the seedlings grow 4 to 6 true leaves, the plant height is 15 to 20 cm, and the seedlings are planted at 60 to 70 days. Refining seedlings 5 ​​to 7 days before planting, select strong seedlings with thick leaves and developed root systems for transplantation on a sunny morning. The plant spacing is 8 ~ 10cm, the row spacing is 18 ~ 20cm, and the planting depth is 30 000 ~ 32 000 per acre. The depth of planting should not be buried in the heart leaves. It should be shallow but not deep.

4. Management after colonization

1. Slow seedling stage management

Slowly seedling period should properly control fertilizer and water, squatting seedlings, and promote hair root and leaf differentiation. After planting, we must storm the fertilizer and water to promote growth.

2. Fertilizer and water management

After 7 ~ 8 leaves emerge, it enters the vigorous growth stage. At this time, the fertilizer and water should be increased, and urea or compound fertilizer should be applied every 10 ~ 15kg every 15 ~ 20 days.

3.Humidity and light control

Before mid-May, cover grasshoppers at night and increase ventilation during the day. Increase the ventilation in late May. During this period, there is a lot of rain. It is necessary to clear the drainage channels in the field in time to prevent rotting water from entering the shed and causing rotten seedlings.

V. Harvesting and post-harvest management

About 15 days before harvest, spray with gibberellin (920) at 50 ~ 100mg / L once. At the same time, 0.3% urea and 1% brown sugar can be sprayed to improve the quality and quality. Harvest celery in a timely manner. Premature harvesting will affect yield. Harvesting the nutrient of the petiole too late will transfer the roots of the petiole, making the petiole texture thicker, increasing fiber, and even appearing hollow, thereby reducing the quality of loquat and affecting yield. Generally, the height of the plant is about 70 cm, and the weight of each plant is 1 kg.

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