When do you grow zucchini in the greenhouse in early spring? What are the key points of fertilization?

Zucchini, also known as zucchini, bear (male) melon, white melon, pumpkin, squash, zucchini, pumpkin, pumpkin Due to market demand, zucchini in greenhouse in early spring has been developed. So when do you grow zucchini in the greenhouse in early spring? What are the key points of fertilization?

When do you plant zucchini in the greenhouse in early spring?

When zucchini is cultivated in greenhouse in early spring, the suitable sowing time depends on the temperature at the time of planting, the tolerance of zucchini varieties to low temperature and the heat preservation performance of the greenhouse. The planting period of zucchini must be carried out when the temperature in the interior of the greenhouse is more than 11 ℃ and the temperature at night is higher than 0 ℃. After the safe planting period is determined, it is the suitable sowing time for local zucchini to be pushed forward 30-35 days from the planting period. Using cold bed to raise seedlings in the Yangtze River basin, the sowing time of zucchini is generally from late January to early February. If a plastic greenhouse is set up with a small arch shed as a seedling raising facility, the seedling can be raised from December to early January, using an electric hotbed or a brewing hotbed.

Second, what are the main points of fertilization of zucchini in the greenhouse in early spring?

1. Base fertilizer

Select loose and fertile plots with different families from the previous crops to build sheds and apply sufficient base fertilizer. Generally, 3000kg of rotten organic fertilizer is applied per mu. After deep ploughing and soil preparation, 150 kg of bio-organic fertilizer or 100kg of cake fertilizer is applied in the ditch. Buckle the shed about 15 days before planting, and increase the soil temperature after closing the shed. Three to five days before planting, the soil preparation was made, the width of the double-row planting border was 1.5 meters (even ditch), and the width of the single-row planting border was 1.0 meters (even ditch).

2. Topdressing

When planting zucchini covered with plastic film, it is generally not necessary to pour slow seedling water. If there is no plastic film, slow seedling water should be irrigated once within 2-3 days after planting. The amount of water should be wet through nutritious soil, not too much. After that, it was watered according to the growth of the plant and the dry humidity of the soil. Furrow irrigation can be used for cultivation with plastic film mulching, but drip irrigation is best combined with topdressing.

Generally in the first batch of melon fruit expansion period of the first topdressing, compound fertilizer 15-20 kg per mu. After the first batch of melons were harvested and the second to the third batch of melons were harvested, the second topdressing was applied with compound fertilizer 8kg / mu or urea 6kg / mu. Fertilizer can be topdressing according to plant growth in the future.

Matters needing attention in planting zucchini in greenhouse in early spring

1. Accelerating germination and sowing

If sprouting is needed, wrap the treated seeds in a wet towel and place them in a 25-30 ℃ environment. When accelerating germination, wash the seeds in warm water once a day, and continue to accelerate germination after controlling the water. Generally, after 2-3 days, the seeds can be sown when the buds are 0.2-0.4 cm long. The humidity of the nutrition bowl should be checked before sowing. If it is dry, it can be properly watered. Put the germinating seeds flat in the nutrition bowl with a small hole in advance, 1 grain per bowl, do not insert the seed, cover the fine soil 1cm after sowing, cover the plastic film, build a small arch shed, close the greenhouse, keep warm and moisturizing.

2. Temperature management

Immediately after planting, seal the greenhouse for heat preservation, keep 28: 30 ℃ during the day and 15: 20 ℃ at night to prevent the low temperature below 0 ℃. In case of low temperature, it is necessary to cover with grass curtain or cover with multi-layer film. If there is a small arch shed in the greenhouse, the film of the small arch shed should be opened during the day and strictly covered at night. After slowing down the seedlings, the temperature was lowered properly, keeping 22: 25 ℃ in the daytime and 12: 18 ℃ at night. It was kept at 25: 28 ℃ during the day and 15 ℃ at night at 4-7 days after planting. When the temperature rises above 30 ℃, it should be ventilated. Take off the skirt for air at noon on a sunny day, and the vents should be from small to large. After late April, the small arch shed in the greenhouse can be removed, and even the skirt edge of the greenhouse can be removed.