How much is the yield of one acre celery greenhouse?

From the planting point of view, under normal circumstances, the unit yield of celery in greenhouse is about 3000~9000 kg; The yield of celery in cold shed is slightly lower, about 2000~7000 kg. Vegetables are planted in the middle of June in the lunar calendar, and the planting area is larger in late July.

Cultivate strong seedlings. The seedling age of celery in greenhouse is 50 ~ 60 days. When sowing in high temperature and rainy season, the seedbed should be a sandy loam plot with high terrain, dryness, good ventilation, convenient irrigation and drainage and rich organic matter. Deep raking flat bed, width 1 ~ 1.2m, length 5 ~ 6m. The bed soil is made of 5 parts of garden soil, 3 parts of decomposed organic matter and 2 parts of dry manure, which are evenly mixed and sieved before application.

The optimum germination temperature of celery seeds is 15 ~ 20℃. Before sowing, choose sunny days to dry the seeds for 2 ~ 3 days, soak the seeds in cold water for 24 hours, and rub and change the water for many times until the water is clear. During germination, wash the seeds with cold water once a day. When 80% of the seeds are white, sow them in sunny evening or cloudy day. Control underground pests. After sowing, set a shade shed above the seedbed 1m to keep it warm, cool and rainproof.

Before emergence, keep the soil moist and not hardened, and spray them with cold water in the morning and evening. Master the principle of watering with small water after the seedlings are fully grown. When the seedlings grow to 1 ~ 2 leaves, reduce the watering times and take off the shade shed on cloudy days or in the afternoon to prevent the seedlings from growing in vain. At this time, the first thinning can be carried out, the seedling spacing is 1.5cm, the seedling height is about 10cm, and it can be planted when there are 4 ~ 5 real leaves.

Planting. Before planting, more than 500 kilograms of decomposed organic fertilizer, 75 kilograms of diammonium phosphate and 40 kilograms of potassium sulfate were applied to the border, and the border was made after ploughing and harrowing to keep the border flat. When planting on cloudy days or in the afternoon, shovel off the main roots by 4cm when picking up the seedlings, and plant them by size to make them grow neatly. The planting depth is the root, and the row spacing is 10? 0 cm. Water immediately after planting.