1.Keep moisture content close
(1) It is required to sow the soil evenly and promote seedling growth and seedling strength. Summer seedling because the temperature is higher, the soil moisture content of the seedling bed is easy to lose, to pour water on the surface of the car, and there is clear water overflow in the car.
(2) Usually the seeds require multiple sowing, individual adjustment, the valuable seeds are required to be watered after the longitudinal rake and horizontal rake before sowing, after pouring enough water, the seeds are sown into the cross of the rake, a seed for each cross, and the cover is good after sowing to facilitate the preservation of soil moisture.
2, the good sun, rain washed off
(1) It is required to build a shade to prevent rain, the temperature of vegetable seedling in summer is higher, and the rainstorm is more, after the seeds are sown into the seedbed, a shade shed about one meter high must be built on the seedbed, and the house frame type.
(2) The shelf is covered with film, and the film is pressed on the corn stalks or branches to prevent direct sunlight and heavy rain from washing, so as not to sunburn the seed buds or rush into the soil.
3, good disease and pest control
It is required to pay attention to the prevention and control of leaf hoppers, aphids, cabbage worms and small ground tigers after the seedlings are unearthed. Focus on prevention and control of seedling diseases.
Second, how to cultivate vegetable seedlings in early autumn
1. Nursery bed preparation
(1) First of all, choose a flat, high-dryness, well-drained, shady and ventilated field for the seedling bed.
(2) At the same time to prepare a good nutrient soil, that is, first with fertile and not planted with vegetables of the same family of crops, the fermentation of organic fertilizer after sifting, according to the ratio of soil fertilizer ratio of 6:4 mixed evenly, and then, in every 1000 kg of nutrient soil with 50% tobuzin or carbendazim 80 grams, 2.5% trichlorfon 60 grams, to kill disease and insect sources.
(3) Fill the prepared nutrient soil into the plastic bowl or paper bowl. On this basis, to make a good nursery bed. The nursery bed should use a high box, the box height is usually 5 cm -10 cm, the width is about 1 meter, and the box surface should be flat.
(4) After making the car, arrange the plastic bowl or paper bowl on the car surface, and fill the bowl with fine sand between the bowls. Dig drainage ditches around the seedbed.
2. Sowing method
(1) Seed treatment: vegetable seedlings in early autumn are prone to disease, and seed work must be done to avoid seed disease. Seeds can be soaked in 10% disodium phosphate solution at room temperature for 20 minutes or soaked in 1% potassium permanganate solution for 15 minutes, washed with clean water after removal, and then soaked to promote germination. For cold vegetables, such as celery, lettuce, etc., to create a lower temperature to facilitate germination.
(2) Selection of sowing time: early autumn vegetable seedlings, according to the characteristics of vegetables, select the planting time, so as to avoid high temperature and exposure of seedlings. For example, Chinese cabbages generally emerge 48 hours after sowing, so sowing in the evening is more appropriate. In this way, the seedlings are unearthed just in the evening, and can grow overnight and then during the day, and the tolerance to high temperature and strong light is relatively strong.
(3) Fine sowing: In the afternoon or morning of the day before sowing to fill the soil moisture, if there is a gap between the pot and the pot, should be filled with sand again. When sowing, shovel loose 2 cm to 3 cm deep in the nutrient bowl, dig a shallow hole 0.3 cm to 0.5 cm deep, sow 2 to 3 seeds at each point, then sprinkle a layer of fine wet soil on the seeds, and cover the seeds.
(4) Precautions: After seeding the seedbed, evenly cover the surface of the seedbed with fine wet soil, and the thickness of the soil cover is about 2-5 times the thickness of the seed. After sowing, insert an arch pole every 1 meters or so on the seedling bed to make a small arch shed, covered with a silver or green sunshade net, which can reduce the harm of strong light and high humidity, but also avoid aphid and reduce the spread of virus. At the same time, it is necessary to prepare plastic film so that it can be covered in time before the rainstorm arrives to prevent rain from hitting seeds or seedlings.
