Summer and autumn nursery protection

Summer and autumn nurseries are mainly cultivated in advance for the summer and autumn vegetables, cabbage, cauliflower, autumn lettuce, early celery, autumn tomatoes, autumn pepper seedlings. These vegetables generally grow well at 20-30°C. Seed germination temperature 15 ~ 25 °C, such as open sowing, it will need to be carried out in late September to October. After October, the temperature dropped quickly and frost appeared soon. The fruits of tomato and chilli will be frostbite and the plants will be frozen to death. Cabbage and broccoli, although able to withstand lower temperatures, cannot form product organs. If you raise seedlings in summer, you can sow in June-August, plant in July-September, and market in August-December, so as to achieve the goal of early maturation and autumnal feeding.
In the early summer, there are many high-temperature and heavy rainstorms. The key to raising the seedlings at this stage is to set shade in the shade of the pergolas, which is also called shading and nursery or cooling seedlings.
1 Nursery facilities 1 Bamboo seedlings are well-prepared for seedlings, so that they can be planted in narrow trenches with a depth of 2m and a surface of 1.3m, a groove width of 0.7m and a ditch depth of 0.1m to facilitate irrigation and management. On the two sides of the box, plant 1.3m wooden piles at a distance of 2m, bundle two rows of horizontal shelves along the top of the wooden piles, and then weave the woven sunscreen or other plant residues on the horizontal shelves. In this way, sunlight enters the bed from the gaps in the curtain, reducing the light intensity and temperature, and cooling down.
2 Set up a shade net shed The shade net covers the flat shed and large, medium and small arch sheds and becomes a shade net shed.
(3) Covering the top film with a double membrane covering the flat shed and the large and medium sheds, and then covering the shade net. This type of coverage has better sun shading and anti-rainstorm effects than single coverage. When covering the sunshade nets need to cover the top of the film, otherwise the cooling effect is poor.
2 Seedbed site selection and site preparation 1 Select loose and fertile sandy loam soil for the seedbed. It is best to open up near the ground and flat the ground to facilitate ventilation. In addition, the water source is convenient and close to the vegetable field.
Before the site preparation, first of all, we must clean the pasture and plow till the soil is fully weathered. Fertilization depends on the degree of fertility in the soil. Before the last ploughing, 1500-2000 kg of decomposed organic liquid fertilizer was applied per 667 square meters. Flat surface, the surface should not be too thin, otherwise easy to build after the rain, unfavorable seedlings.
3 Seeding and management 1 Spreading or seeding can be done on the whole seed bed. After sowing, thinly cover a layer of culture soil or rake it with a rake, then divert water to a half ditch so that it slowly infiltrates into the seedbed and the excess water is drained in time.
2 Uncovering covers must be flexible. It is necessary to prevent the cover from being too long, the seedlings to see the light for a short time, causing leggy, but also to prevent the cover time is too short, the seedlings grow poorly under high temperature and strong light, or washed out by heavy rain. Therefore, the cover must be “look at the sky, look at the land, and see the seedlings”. Generally sunny days when the sun is strong, cover at around 10 am and uncover at around 5 pm, cloudy days can not cover; soil moisture is too large or with the seedlings The growth of the past, the past can shorten the curtain time until it is completely uncovered.
3 watering fertilizer. In the high temperature season, the amount of evaporation is large. Watering should be carried out in the morning and in the evening so that the water is cool and cool. Also be diligently poured to keep the soil moist. In particular, the use of omentum coverage, the moisture in the shed completely rely on artificial supply. In the process of nursery, due to the high temperature both inside and outside the greenhouse, the amount of evaporation is large, and there is much water loss in the soil. Therefore, sufficient moisture must be supplied, otherwise it will seriously affect the growth of seedlings in the shed. If the weather is arid, ditches should be diverted at 6 pm to maintain half a ditch instead of spreading to the surface to prevent soil compaction. After irrigation, let go of excess water. In combination with water, topdressing and decomposing thin human feces and urine water 2 to 3 times, do light-duty ground facilities.
4 soil mulch. Summer and nursery due to the number of watering, roots often exposed to water due to water or rain, timely repair of the root protection.
5 points seedlings. When the seedlings grow up and they are overcrowded, they need to be divided. Timely pest control and weeding and weeding.
6 Planting and raising seedlings should bring soil. Before the planting, irrigating the water, and burying the water with the water, then spray the insect repellent for one time, so that it can be soiled, fertilized, and colonized with the medicine. After colonization, the seedlings recovered quickly. (Lu Shengjun, Seed Company, Xinye County, Henan Province)

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