First, choose a good species
Should choose disease-resistant, high-yield, suitable for local consumption habits of early maturing varieties, such as Jinchun 2, Jinchun 3, Jin Za 4 and so on.
Second, the appropriate period of nursery
(A) Seedbed preparation
In early spring, cucumbers in greenhouses generally use nutritious lotus seedlings, and 1 mu of cucumber needs about 35 square meters of seedbeds. Generally, seedbeds grow 8 to 10 meters in length, 1.2 meters in width and 10 to 15 centimeters in depth. /3 The proportion of finely decomposed farmyard fertilizers is prepared, mix well, and dried for use. The seedbed and nutritious soil should generally be prepared 7 days before sowing.
(ii) Sowing period
It is generally selected for sowing on sunny days in late January.
(3) Immersion seed germination
In general, one mu of land is planted with 200-250 g of seeds, and the seeds are placed in a hot water of 55-60°C. Steadily stir. After 15 minutes, soak in fresh water for 2 to 4 hours. Wash them with clean water. Put it in a wet cloth bag and germinate at 25°C to 30°C. After about 30 hours, when the white beak is exposed, it can be sowed.
(D) sowing
Before sowing, the seedbeds should be poured into bottom water. After submergence, 0.5 cm thick subsoil should be sprinkled. Then the seeds should be sowed in advance. Each seed should be seeded with a nutritious soil with a thickness of 0.5 cm. In order to prevent seedling diseases, we must mix carbendazim and other fungicides with cover soil. After sowing, bamboo shoots are used as small arches on the seedbeds, which are 0.5-0.6 meters high so as to cover the film and straws.
(v) Seedling management
1. Temperature. The temperature is mainly regulated by ventilation and covering grasshoppers. Seedlings should be maintained at a higher temperature for seedling emergence, maintaining a temperature of 27°C to 30°C during the day and a ground temperature of 22°C to 25°C. Under normal circumstances, 5 to 7 days Qimiao. Qi Miao to the first true leaf when the beginning of ventilation, air conditioning during the day to maintain 20 °C ~ 25 °C, night 15 °C ~ 17 °C, during this period the temperature is too low, will extend the seedling age, easy to form a flower topping premature aging phenomenon, If the temperature is too high, the seedlings will be prolonged. 7 to 10 days before planting, mainly cooling and hardening seedlings, the daytime temperature of 15 °C ~ 20 °C, increase ventilation, widening the temperature difference between day and night, in the night before planting 3 to 5 days the temperature can be reduced to 5 °C ~ 7 °C, To resist the early spring cold hazard.
2. Light. In the seedling stage, more light is better. In the morning, the sun shines on the seedbed, and in the afternoon, the sun leaves the seedbed that covers the curtain.
3. Moisture. Seedling watering control low temperatures do not pour, bed soil does not dry, do not pour in the afternoon, when individual parts dry at individual filling, can not easily pouring water and full watering.
4. Disease prevention at seedling stage. The bactericidal drugs are usually sprayed once every 7-10 days, and the spraying is generally performed on a sunny morning. It is better to use several fungicides for rotation.
Third, timely colonization
(I) Fertilization for soil preparation
After the harvest of the former crops, the planting depth was promptly deepened. The Mushi farmyard fertilizer was 5,000 to 10,000 kilograms, and 20 to 25 kilograms of phosphate fertilizer or multiple compound fertilizer was added before the crop was used. Cucumber cultivation generally uses deep-sorghum sorghum planting, pod width of 1 to 1.1 meters, sorghum height of 15 cm, after the scorpion to cover the mulch, in order to warm up and protect.
(ii) Time for planting and standards for seedlings
Early spring greenhouse cucumbers are generally planted from late February to early March. The ground temperature is increased by 20 days before planting. Planting requires seedlings with thick stems, short sections, dark green color, and well-developed root systems, 4 to 5 leaves, and about 50 days of seedling age.
(c) Method and density of colonization
Planting is best before and after noon in cold-tail warmer weather. Planting methods: spread the film, open the hole, put the seedlings, water, cover the soil after the cover film with the soil sealed Yan, to prevent leakage of cooling injury wounded, keep the shed in the ground level, wet and dry on the dry, help reduce the air humidity inside the shed. Generally about 4000 acres of seedlings.
It can prevent some medicine or blood from splashing on the face, thus protecting the eyes. This kind of glasses is generally used in conjunction with masks and surgical caps to fully protect the doctor's head.
[Functions of medical eye masks]
1. Prevent blood, potion and other liquids that cause damage to the skin from causing unpredictable damage to the eyes.
2. It can prevent the impact of objects on the eyes during close surgery.
3. The inner space of the eye mask is large enough for doctors who wear myopia glasses.
4. The breathability must be good, generally there are vents
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