There are big leaf varieties and small leaf varieties of coriander. Large-leaf varieties have tall plants, large leaves, few nicks and shallow leaves, light fragrance and high yield; Leaflet varieties have short plants, small leaves, deep notches, strong fragrance, cold tolerance and strong adaptability, but the yield is slightly lower. Generally cultivated leafy varieties.

2. Open field cultivation

Coriander can be cultivated in the open field in spring, autumn and winter. It is not advisable to water too much at seedling stage. When the seedlings grow to 10 cm, the plants will thrive, and Qin Ying will water them to keep the soil surface moist. At the same time of watering, topdressing can be applied with nitrogen fertilizer 1-2 times. Pay attention to intertillage and appropriate thinning, and pull out weeds during thinning. In summer, it is necessary to shade properly to prevent rain erosion, and drain water in time after rain to ensure the orderly emergence of seedlings.

3. Greenhouse cultivation

Generally, it is broadcast live at 5438+00 from September to June, and frozen water is poured once before winter, which is convenient for seedlings to overwinter. 1 month buckle shed, 1 no ventilation until February. When the seedlings turn green, intertillage, loosen the soil and weed. When the seedling height is 10 cm, the plant enters the vigorous growth period, and the greenhouse temperature is maintained at 15℃ to 25℃. Using ammonium sulfate 15 kg per mu and topdressing 1 ~ 2 times can harvest in advance.

Coriander management method:

In general, the plots with loose soil, rich organic matter and convenient irrigation and drainage should be selected for planting coriander. After the previous crop is harvested, turn over the soil in time to a depth of 15-20 cm and let it air-dry for more than 2 weeks.

Then 4,000-5,000 kilograms of decomposed high-quality farm manure and compound fertilizer 10- 15 kilograms are applied to each mu as base fertilizers, and after ploughing and harrowing, the ridge is made into a width 140- 150 cm and a height of 20 cm according to the length of the plot.

The boundary needs fine, loose and flat soil. If drilling is used, a sowing ditch with a width of 4-5 cm and a depth of about 2 cm should be opened at the border according to the row spacing of 8- 10 cm to prepare for sowing.

Extended data:

Morphological characteristics of coriander;

Annual or biennial herb with strong smell, 20- 100 cm tall. Roots are spindle-shaped, slender and have many slender branches. The stems are cylindrical, erect, multi-branched, striped and usually smooth. Rhizomes have stalks and are 2-8 cm long.

Leaf blade 1 or 2 is pinnately cleft, pinnately broadly ovate or fan-shaped, with a length of 1-2 cm and a width of1-/0/.5 cm. The edge is obtuse, serrated, notched or deeply cleft, the upper stem leaves are 3 or even more pinnately cleft, and the last lobe is narrow, with a length of 5.

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