Germination accelerating method

Soak the seeds with 1% potassium permanganate solution for 15 minutes or with 10% carbendazim wettable powder solution for 30 minutes, take them out, clean them, and put them out at 20-25℃ to accelerate germination.

Variety selection

There are big leaf varieties and small leaf varieties of coriander. Although the yield of small-leaf varieties is not as high as that of large-leaf varieties, they have strong fragrance, cold tolerance and strong adaptability, so many small-leaf varieties are generally cultivated.

Soil preparation and fertilization

Select a plot with loose soil, rich organic matter and convenient irrigation and drainage. After the previous crop is harvested, turn over the soil in time to a depth of15-20cm, let it weather and sun for more than 2 weeks, and then spread 4,000-5,000kg of decomposed high-quality farm manure and compound fertilizer10-0 per mu. The border requires fine, loose and flat soil. If drilling is used, a furrow with a width of 4-5 cm and a depth of about 2 cm should be opened on the border according to the row spacing of 8-10 cm to prepare for sowing.

sow seeds

You can sow at any time from late August to early April of the following spring. Before sowing, rub the seeds, then put the seeds in hot water at 50-55℃, stir and scald them for 20 minutes, and continue to soak the seeds when the water temperature drops to about 30℃,18-20 hours later, or sow after germination. Generally, 2-3 kilograms of dry seeds are sown per mu.

Water and fertilizer management

Coriander likes to be wet, so it should be watered frequently to keep the border moist. You can also irrigate furrow irrigation in time when the soil is slightly dry, but after the border soil is wet, the accumulated water in the field ditch should be drained in time to avoid affecting the plant growth.

Light and temperature requirements

Light and temperature requirements

Coriander can withstand the low temperature of-1to-2 degrees, and the optimum growth temperature is17-20 degrees. When it exceeds 20 degrees, it grows slowly, and when it exceeds 30 degrees, it stops growing. Like light, but also resistant to yin. If the shading is about 50% in autumn, and the water mist is sprayed on the leaves frequently, and the transverse arch film or greenhouse is used for heat preservation in winter and early spring, the yield and quality can be improved.

pick

Coriander can be harvested 6-9 weeks after sowing. When harvesting, the roots are dug up to remove soil, old yellow leaves and other impurities. After washing, it is bundled and sold. The average yield per mu is1000-2,500 kg, and the high yield can reach more than 3,000 kg.

plant

1, put a layer of soil in the finished plastic bottle (the part with the cap). The soil should be fertile and loose, which is beneficial to the growth of coriander. It is doubtful that coriander is a shallow-rooted vegetable with short growth period, strong taproot, weak bud and strong fertilizer absorption ability. Therefore, we must choose loam with good drainage, fertility and looseness, and water and fertilizer conservation.

2. Start sowing, then press it with your hands and water it to keep the soil moist and facilitate the emergence of coriander seeds.

3. During seedling growth, it is necessary to observe the growth of coriander seedlings regularly, and coriander is not drought-tolerant. If soil hardening occurs, it means that it is necessary to loosen the soil and water it in time to ensure sudden wetness.

4. It's time to harvest! Go and harvest coriander.

Method for plan coriander in beginning of autumn

The planting method of organic coriander after beginning of autumn is related to the yield of coriander, and the cultivation of organic coriander should be three-proof.

Prevent bolting. Organic coriander planted in summer and autumn will not be bolting because of low temperature at seedling stage, but it will be bolting because of long sunshine (conditions) in summer and autumn, which requires the selection of bolting-resistant coriander varieties in production. In addition, strengthening fertilizer and water management (lightly topdressing seedling fertilizer when watering) can reduce bolting.

Prevent "red stalks". Coriander "red stalk", that is, the stem and leaf of coriander turn from green to red, which reduces the commodity value of coriander and reduces the purchase price by half. In summer and autumn, the stems and leaves of coriander planted in the open field will turn red by strong light, especially when the seedlings are too late (the plant height is more than 8 cm). In order to prevent the "red stalk" of coriander, first, the seedlings should be interplanted early, and the new high-fat film should not be sprayed once every seedling. In production, it is appropriate to grow the seedlings to 3 cm high and keep the spacing between the seedlings at about 2 cm. The second is to cover the sun-shading net. Farmers who have the conditions can set up a shed with a height of 80 ~100 cm after sowing, and cover the shed with a layer of sun-shading net.

Rain protection. In summer and autumn, there is more rain, which is very harmful to coriander seedlings just after emergence. After the heavy rain, it suddenly turns sunny again, which can easily lead to coriander rotten heart. After the rain, the well water should be lightly watered once, and the amount should not flood the seedlings. Spraying a new high-fat film once can prevent the coriander from rotting.

The three defenses are the key to the planting method of organic coriander. In addition, the new high-fat film of vegetables should be used in time during the three defenses to make the plants stout, thick leaves, fresh and tender leaves, lush plants and strong natural taste. At the same time, it can improve the ability to resist disasters.