How to choose bean seeds? What are the methods of raising seedlings?

Beans, also known as cowpeas, taste unique, in the market demand is greater, planting farmers are also many. Bean has strong heat resistance and can grow normally when it is about 35 ℃. At present, it has been planted all over our country. And to grow beans, the most important thing is to choose seeds. So how to choose bean seeds? What are the methods of raising seedlings? Next, let's have a look with the editor.

First, how to select bean seeds?

The seeds of beans are small and the cold resistance is weak. The selection of seeds before sowing is the key to ensure the whole and strong seedlings. In order to improve the germination energy and germination rate of seeds and ensure neat and rapid germination, seed selection and drying should be carried out. Get rid of poor plumpness, moth-eaten, damaged and moldy seeds, and dry the land for 1 or 2 days on a sunny day.

Second, what are the seedling methods of beans?

1. Soak seeds and sow seeds

Soak the seeds in water at a temperature of 25: 30 ℃ for 2 to 3 hours, then leave the water. Because the radicle of cowpea is very sensitive to temperature and humidity, it is generally only soaking seeds, not sprouting. Water before sowing to make enough soil moisture. When sowing, plant 3-4 seeds in a pot and cover the soil 2-3 cm thick.

2. Raising seedlings

Beans in early spring are mostly for seedling transplanting, and nutrition bowls are used to raise seedlings in the middle and last ten days of March. It is necessary to build a seedbed in the protected area and make a high border, requiring a border width of 120 cm. 8 "× 8" plastic bowls or paper bowls can be discharged in the border. The nutrient soil was loaded into a nutrition bowl with rotten pig manure and garden soil free of disease and insect pests according to the proportion of 1:1. Put the selected seeds in a basin, then blanch them quickly with about 90 ℃ of hot water, then cool them with cold water. Keep the water temperature at 25: 30 ℃, soak for 4: 6 hours, then drain the excess water and sow the seeds.

When sowing, pay attention to watering the bottom of the bowl first, and wait for the water to go down and put 3-4 seeds in each bowl. Cover fine soil 2cm to 3cm, then cover with plastic film and plastic arch shed, so as to increase heat preservation. After sowing, the temperature of the seedbed should be kept at 25 ℃ during the day and 20 ℃ at night. After arching the soil, the buds should remove the plastic film and cover it with fine soil 0.3cm thick to reduce the temperature of the seedling bed to 22: 23 ℃ during the day and 13: 14 ℃ at night. Strengthen the light while maintaining sufficient light for 10 to 11 hours a day, and pay attention to prevent low temperature and humidity in the seedling stage.

After emergence, a strong wind can be released when the daytime temperature is more than 17 ℃, and when the night temperature is above 15 ℃, it can be taken without mulching, and generally there is no need for watering. If mild wilting occurs around noon, it is necessary to prevent the phenomenon of small water watering to let the seedlings grow. The mulch should be removed to refine the seedlings 7 days before planting, and water should be watered once before planting.

3. Post-broadcast management

After sowing, the seedlings were kept about 30 ℃ in the daytime and 25 ℃ at night to promote the emergence of seedlings. The seedlings germinated 7 days after sowing at normal temperature, and all the seedlings emerged in 10 days or so. At this time, the Hypocotyl of cowpea is particularly sensitive to temperature, and high temperature will inevitably lead to overgrowth of plants, so it is necessary to keep the temperature down at 20: 25 ℃ during the day and 14: 16 ℃ at night. At the same time, the seedling temperature can not be too low, we should strictly prevent the invasion of cold air, so as to avoid rust roots. Cowpea seedlings are generally not topdressing, but it is necessary to strengthen water management to prevent the seedling bed from being too dry and wet, and the soil relative humidity is about 70%. The seedlings were refined at low temperature about 7 days before planting. Pay attention to ventilation, let the seedlings see more light, and prevent the seedlings from overgrowing.

The above is the introduction of bean seeds. Beans adopt the method of raising seedlings, which can fully protect the root system from damage. Moreover, seedling transplanting can inhibit the vegetative growth of beans and promote reproductive growth, so that the seedlings are strong, grow quickly, and the pod position is also reduced. beans can draw vines, branches, blossom and pods earlier, which is more favorable for beans to obtain high yield.

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