Fruit-type indigo is a newly introduced special vegetable variety in China. It is made up of swollen fleshy bulbs and young leaves. The bulbs are crispy, refreshing and refreshing. They are nutritious and suitable for cold salad. The young leaves are rich in nutrients and contain high calcium. It has the health-care function of eliminating food and removing cockroaches. It has a short growth period, few diseases and easy planting. In recent years, the price of spring indigo is higher than that of autumn indigo, so the prospect of spring indigo planting is promising.
(1) Selection of good varieties: choose the spring amaranth variety "Aide" which is resistant to convulsions and bulbs. The bulbs are oblate, the epidermis is light yellow-green, the leaves are light green, the plant type is inclined, suitable for close planting, single ball It weighs about 500 grams, has a crisp taste, excellent quality and strong disease resistance. It is harvested about 60 days after planting.
(2) Sowing at the right time: The suitable sowing date for the indigo in the spring area of ​​Tianjin is from late February to early March. The specific time is to choose the “head†of the sunny day or the “tail†of the cloudy day. Sowing in advance, easy to cause immature convulsions, affecting the yield and quality of the bulbs; seeding after the wrong, small seedlings, mature late, low efficiency, so it should be planted strictly on time.
(3) Seeding and seedling raising: seedlings of 72-hole or 128-point seedlings are used, with grass charcoal and vermiculite as matrix. Ordinary seedbed seedlings can also be used. For seedling seedlings, the bottom water is poured before sowing, and the 8-10 cm soil layer of the seedbed is required to reach saturation. 1.5 grams per square meter of seedbed, about 60 grams of acres, dry seeds spread. After sowing, a layer of sifted fine soil is applied, the thickness is about 0.5 cm, and the thickness of the soil of the whole seed bed is required to be uniform.
(4) Cultivate strong seedlings: After the seedlings are out, the soil is once soiled, the thickness is 0.5 cm, to prevent cracking of the soil surface; after the cotyledons are unfolded, the seedlings are 6.7 cm away, and the soil is then soiled once, with a thickness of 0.5 cm. The seedlings take root and reduce the temperature of the seedbed to prevent the occurrence of squatting. The temperature at the seedling stage is 18-22 degrees Celsius during the day and 8-10 degrees Celsius at night. As the outside temperature rises, the amount of air is gradually increased to prevent the seedlings from growing. 5 days before the planting, all the coverings can be removed and the large seedlings can be carried out. The seedling age is about 30 days, and it can be colonized when there are 5-6 leaves.
(5) Site preparation and planting. Choose the land with fertile soil, water and fertility, 5,000 kg of high-quality farmyard manure, 30 kg of compound fertilizer, deep ploughing, and mix well with soil and fertilizer to make flat sputum. The row spacing of planting plants is 33 cm, and the number of seedlings is 5500-6000. It is required to carry the soil with the soil and the watering, with less damage to the roots, and promote the early seedling and early survival.
(6) Fertilizer and water management: Spring indigo has a short growth period and is generally harvested 60 days after planting. After planting the seedlings, timely tillage and conservation, increase the ground temperature and promote root development. Pay attention to the seedlings, do not prematurely top dressing and watering, otherwise it will easily cause the plants to grow long and affect the bulb development. It is required to start watering when the diameter of the bulb is expanded to 4 cm or more in the middle and late stages of the bulb expansion, to keep the soil moist, to prevent the soil from being too dry and too wet, to cause unevenness in the wet and dry, causing the bulb to crack, and at the same time top dressing 1-2 times to promote bulb expansion. One-time application of urea or compound fertilizer 15-20 kg.
(7) Timely harvesting: The maturity of the spring indigo blue is from late May to early June, the temperature is higher, the bulbs should be harvested in time after reaching the market standard, and the fresh food should be harvested earlier, otherwise the fiber will increase and the quality will increase. decline.
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