Bracken is also known as a dragon dish, a fern dish, and a fake box dish. It is a perennial herb. As early as three or four thousand years ago, our ancestors used bracken as a dish. The bracken is tender and soft, has a long aftertaste, and has high nutritional value. It also has a variety of medicinal functions. It enjoys the reputation of “King of the Wild†in numerous wild game. It is longer than the mountains and is a natural vegetable. It is rarely contaminated by pesticides and chemical fertilizers. Therefore, it is the most "clean" pollution-free vegetable and is increasingly favored by consumers. In recent years, China's agricultural science and technology workers have developed artificial cultivation methods for bracken, which can be used for open cultivation and facility cultivation. They can be marketed throughout the year. The open cultivation techniques are now introduced: 1. Propagation methods 1. Spores Sexual reproduction. During the spore maturation period from July to August, the spore colony with the appearance of uncracked brown was selected, and the spore-bearing leaves were put in a clean and smooth paper bag and dried for use. Take rotted weak acid garden soil plus river sand turf soil mix and sifted, sterilized with steam for 30 minutes, soil moisture is about 95%. The spores were sowed in the above culture soil, do not have to cover the soil, to be shaded. Keeping the temperature at 20-25 °C, sporulation after 30-40 days, showing light green spoon-shaped or fan-shaped protoplasts, keeping light for 4 hours per day, and growing to 5 mm high, spraying water twice a day for a week , develop into sporulated plantlets. When the blade grows to 5 cm, when the third leaf grows, it is transplanted. At this time, the soil must be kept moist and shaded, and the second year begins to thrive. Planting can grow for 10 years, from May to June each year. When the plant height is 25 centimeters, young leaves can be harvested, and 2-3 can be harvested continuously. 2, root propagation. Bracken is most commonly propagated from rhizomes of thistle. The rhizomes of bracken are collected in wild fern fields in early spring or late autumn and stored moist in wet sands for the spring (late April to early May) or autumn ( In late October, cuttings can be carried out, dividing the rhizome into several segments, keeping 1-2 shoots in each segment, and maintaining a certain amount of fibrous roots. Second, soil preparation should be selected for transplanting. The soil should be deep, gentle slopes should be sunny, and the soil should be weakly alkaline. Deep plowing should be done in the autumn. In the second year, 4,000-5,000 kg of organic fertilizer should be applied to the site and plowed and leveled to make 1.2 meters. The wide stilts are 30 cm in row spacing, 5 cm in depth, and 20 cm in plant spacing. The prepared root cuttings are planted in hoe ditch. After planting, the mulch is covered with soil, and the top soil is compacted and then watered and covered with plastic film. After the emergence of the mulching film, weeding, loose soil. When the plant height is 3-5 centimeters long, fertilize with water and apply 10 kg of urea per acre. Third, the harvest can be harvested in the second year, select the petiole is thick, young, the top leaves unfolded fern leaves buds (leaf buds to be more than 20 cm), when harvesting leaf buds can not damage the underground rhizomes After harvesting, they are graded according to their size, and the bundles are listed. Harvested every 15-20 days, harvested and then air-drying 1-2 days, then watering and fertilizing, and promote the growth of new stems and leaves.
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