Fennel is also called Huaixiang, cumin, Xixiang, Xiangcai, Umbelliferaceae perennial herb. Stems and leaves, roots, and seeds all contain essential oils. The main components are anisole and anisone, which have special aromas. They are served by tender stems and leaves, and they are used as spices. It is more cold-resistant, widely distributed, and suitable for humid and cool areas. The planting in the north is universal and can be cultivated in all seasons, especially in spring. The quality of planting in summer is poor, and can be produced in protected areas in winter, which has a good effect on the annual supply and the addition of off-season vegetable varieties. There are three kinds of fennel, anise, fennel and bulb fennel. Anemone plant tall, high 30--45cm, whole plant 5--6 leaves, petiole long, large leaf spacing, fast growth, convulsions early; small fennel plants, high 20--35cm, generally 7--9 Leaf blade, short petiole, small leaf spacing, slow growth, late bolting; traits of bulbous fennel are similar to ordinary fennel, but only part of the plant leaf sheath is hypertrophied into a spherical shape, bulbs can be fried, raw, and leaves can also be used as stuffing, slow growth, Late picking, high yield, but lighter aroma. The fennel germinates at a suitable temperature of 16--23°C, explants a suitable temperature of 10-16°C, and the monthly growth is suitable for a temperature of 15-18°C, a maximum of 21--24°C, a minimum of 7°C, and a low temperature of -2°C. When planting can be sown at any time according to market needs. The most suitable sandy loam soil, more than the use of flat hoe, ditch or broadcast sowing, sowing rate of 66-67m2 per 3--5kg. The cold season is best covered with a shed or Yangshuo cultivation. Strong regeneration, one-time sowing, sub-harvesting, continuous harvest for several years. The seeds germinate slowly and should be soaked and germinated before sowing. It was unearthed 6-7 days after sowing, and irrigation, topdressing, weeding, and control of locusts were strengthened during the growth period. In the vegetable area, fennel is mainly used as vegetable for young leaves, once sowing, once harvesting, and it can also be harvested separately. Fractionation should be kept at a time of 5 cm in order to facilitate regeneration and to strengthen fertilizer and water management. China Agricultural Network Editor
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