Amaranth, native to China, has a short growing cycle, one-time sowing, multiple harvests, and can produce and supply for the year. It is a green leafy vegetable with promising development.
First, the election site preparation
Leek cultivation should choose land with fertile land, less weeds and convenient drainage and irrigation. After the plots have been selected, the land should not be ploughed too deeply (15cm is appropriate). When the site is set, deep trenches are required for drainage and irrigation. And apply enough basal fertilizer to make a sorghum with a width of about 1.5 to 2 meters. The sorghum surface must be leveled and smashed, and every two squats should open a deep ditch. The clods should not be too thick to prevent the seed from falling too deep into the soil when sowing, and it is not easy to emerge.
Second, the appropriate sowing
The spring planting will be planted from late February to late April, summer planting from July to late August, and autumn planting from early September to early October.
Three, appropriate sowing
The seeding rate in spring is 0.75 to 1 kg per mu, 1.5 to 2 kg per mu in summer, and 1 to 1.5 kg per mu in autumn. For example, during the summer and autumn, the seeds of new leek harvested in the year were sown. Because the seeds have not yet been out of dormancy, they should be sown at a low temperature of 2°C to 7°C and then sowed.
Fourth, sowing techniques
During the summer and autumn sowing, you can wet the land 1 to 2 days before the site preparation and then do the earthwork. Before sowing, the seeds and dry fine sand (2 to 3 times the weight of the seeds) are mixed well to spread the seeds and require uniform sowing. After sowing, gently step on the surface with your feet, pouring enough water. Spring and autumn sowing are covered with plastic film, and summer sowing is covered with shade net. After emergence, the mulch or shade nets will be removed to keep the ground moist and promote growth. The seedlings usually emerge in 3 to 4 days after the autumn sowing, and the seedlings will emerge in 6 to 15 days in the spring sowing.
V. Field Management
1. Dressing up promotion. 1 The growth period of spring and summer sowing is short, and top dressing is usually 2 times. The first topdressing is carried out when two true leaves of the seedlings are applied, 0.3 kg of urea solution per acre is applied to 1000 kg, and the second top dressing is carried out for 7 to 10 days before harvest. 2 The growth period of the autumn sowing is long, topdressing 4 times, per person per acre perfusion of urine urine of 1500 to 2000 kilograms.
2. Watering moisturizer. The leek seeds are small and affected by the soil moisture. Pay attention to watering and moisturizing before emergence. The watering time should be suitable for morning and evening. The cultivation of leeks has a high density and requires a lot of water. Therefore, it must be poured lightly and frequently poured.
3. Rinse the mud. During the summer and autumn, if there is a splash of mud on the leaves or the cabbage after a thunderstorm, the mud should be washed off in the morning or the evening with a watering can, otherwise it will affect the growth.
4. Weeding in time. Leek plants are dwarf, usually sowing, so weeding is more difficult and weeding should be done in time. The grass is pulled by hand and the grass is picked with a knife.
Sixth, disease prevention and pest control
Downy mildew and aphids are the main diseases and pests of leeks, and comprehensive measures must be taken to control them. Can use 75% chlorothalonil wettable powder 600 times or 72% Kelu wettable powder 600 ~ 800 times liquid spray control downy mildew. Aphids can be controlled by imidacloprid or pyrethroid pesticides.
Seven, batch recovery
Leek is harvested in different times, and each harvest should be harvested. The leeks sown in late February are harvested and put on the market in early April, and they are generally harvested 1 or 2 times with a yield of about 1,000 kilograms per mu. Summer sowing of leeks, from sowing to harvesting is generally 20 to 30 days, the number of harvested is 1 to 2 times, dense harvesting, harvesting at a thin place, so that the remaining plants can have a certain nutritional area To promote balanced growth and orderliness. The early autumn sowing of leeks, real leaves 10 to 13 pieces of harvest, sowing 30 to 35 days after sowing, after harvesting 4 to 5 times in stages, to the end of the following year in late March, the total output per mu 2500 to 3000 kilograms. In order to increase production, extend the supply period, collect and collect income at the time of harvesting, close the collection and increase output. The autumn leeks planted in early October take 45-60 days to begin harvesting.
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