Flowering method
Onion orchids are sunny, but they are also resistant to half-yin, requiring a warm and humid environment, suitable for sandy loam that is rich in humus and well drained. The onion is not strong, and it is mainly propagated by dividing the bulbs, usually in the spring. When planting the ground, it is necessary to apply enough base fertilizer. The planting should not be too deep. Choose 3~4 bulbs to be planted together. Generally, it should be planted once every 3~4 years.
The planting site should be sheltered from the wind and the sun, and the soil is fertile and moist. During the growth period, the soil should be kept moist, and 2~3 times of thin pancake fertilizer water should be applied every year to grow well and bloom. If yellow leaves and residual flowers are found during the flowering period, they should be cut off and removed in time to maintain the appearance and avoid the consumption of more nutrients. Onion is not cold-resistant, and potted plants are needed in East China. The potting soil should be selected from loose, fertile, and well-drained culture soil, which can be mixed with humus soil or peat soil, garden soil and river sand.
Watering should be sufficient during the growth period, and the soil should be kept moist, but not water. If the weather is dry, it is often necessary to spray water on the leaves to increase the humidity of the air. Otherwise, the tip of the leaves is easy to yellow. During the vigorous growth season, it is necessary to apply once a thin liquid fertilizer every half month. The summer in the north is strong, and should be kept under shady, otherwise it will grow poorly and affect flowering. If you can maintain a certain temperature after entering the room in winter, you can continue to grow and bloom.
Breeding technology
The phenomenon of shrinking head and returning grass [3] encountered in raising green onion is mostly caused by damage, rigidity or decay of the orchid root, which is difficult to transport nutrients to the upper part. Therefore, Yang Lan needs to pay attention to root protection.
Orchids need to enter the room for winter in the Jiang and Zhejiang regions. After entering the room, the amount of water needed for orchids is greatly reduced. It is necessary to make water from the pots and soils. It is better to use some of them to prevent water from rot. After the house is out of the orchid, you can't apply heavy fertilizer, and you should not apply it frequently. You need to adapt to the outdoor environment (about 20 days), and then apply some thin fertilizer regularly to avoid damage to the roots. The stalking horticultural varieties have poor resistance to stress, and various conditions may cause "shrinking" and "returning grass".
It is vital to plant the soil with orchids. It is not suitable for raising gluten, powdery soil and alkaline soil, because these soils are not conducive to hair roots, are not easy to drain, and have poor air permeability. With this soil, it will form a simple seedling of short grass roots.
At this time, you need to remove the potted soil, repair the roots, cut off the leaves, replant with the nutrient-rich acidic granular soil suitable for orchids, and set the shading under 80% shade, daily spray 3 ~4 times, spray once a week for vitality, spray Shibao and thiophanate and other anti-disease drugs, after growing a new root, according to normal management and maintenance.
Prevention of anthrax
The green onion should be treated with loose soil watering and fertilization to enhance the growth of the plant and improve the disease resistance; for the place where the original disease is heavier, it can spray 2000 to 3000 times of the bacteria or 600 times of the Xiansheng, 7 to 10 days. Spray again and spray 2 to 3 times.
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