Planting time and method of coriander

Abstract time: open field can be planted in all seasons, it is recommended to choose small leaves and heat-resistant varieties. Open field cultivation: seedling stage should not be watered too much, when the seedlings grow to 10 cm, water frequently, keep the soil surface moist, topdressing quick-acting nitrogen fertilizer 1 to 2 times, remove weeds when thinning seedlings, shade properly in summer, and drain timely after rain. Greenhouse cultivation: irrigate frozen water once before winter, buckle shed in January, no ventilation in January-February, cultivate, loosen soil and weed when seedlings return to green, and apply fertilizer in vigorous growth period.

Coriander is a kind of vegetable introduced from abroad. It has been planted for a long time in China. Now it is widely distributed in China. The consumption rate of coriander in our country is still very high, and it is very popular with people. So there are a lot of people who want to grow it. However, before planting, it is necessary to understand its planting technology and time.

How and when to grow coriander

Time: The main planting method of coriander is open field planting, which can be planted in all seasons. First of all, choose the best varieties, it is best to choose more heat-resistant varieties, because most of our countries are relatively hot.

Methods:

1, variety selection, coriander has large leaf varieties and small leaf varieties. Large leaf variety plant height, large leaves, less and shallow notch, light fragrance, higher yield; small leaf variety plant height, small leaves, deep notch, strong fragrance, cold tolerance, strong adaptability, but slightly lower yield, generally cultivated more than small leaf varieties.

2, open field cultivation, coriander spring, autumn and winter can be open field cultivation. The seedlings should not be watered too much. When the seedlings grow to 10 cm, the plants grow vigorously and should be watered frequently to keep the soil surface moist. Water while topdressing quick-acting nitrogen fertilizer 1 to 2 times. Pay attention to intertillage and proper thinning, and remove weeds when thinning seedlings. In summer, proper shade is required, and rainstorm-proof scouring is prevented. After rain, timely drainage is required to ensure neat emergence.

3. Greenhouse cultivation, irrigation of frozen water once before winter to facilitate seedling overwintering. January buckle shed, January to February do not need ventilation. When the seedlings return to green, intertill, loosen soil and weed. When the seedling height is 10 cm, the plant enters the vigorous growth period, and the greenhouse is maintained at 15℃ to 25℃. Ammonium sulfate 15 kg per mu each time, dressing 1 to 2 times, can be harvested in advance.

The growth habits of coriander

1, temperature: like cold, heat intolerance, the optimal temperature of 15-20℃, coriander resistance-1℃ to 2℃ low temperature, more than 30℃ growth is slow.

2, lighting: happy light, east, west, south towards the balcony, terrace, roof can be planted, the sun is too strong to be properly shaded.

3, humidity: seedling should not be watered too much, if the amount of watering is too large, it is easy to appear some root diseases. When the seedlings grow to 10cm, the plants grow vigorously and should be watered frequently with small water to keep the soil surface moist.

Fertility technology of coriander

1, temperature and fertilization: coriander in the outside temperature of 15 to 20 degrees, the fastest growth, if planted in summer, should pay attention to cooling. Topdressing is best not topdressing, if the base fertilizer is insufficient, it can be applied to the roots about 10 days before harvest. Spray urea, concentration of 1.5%, can be sprayed twice. Every half a month to spray decomposed organic fertilizer once, want to keep their own seeds, you need to add some phosphorus fertilizer.

2, watering points: generally do not water before the seedlings, in order to control the promotion, squatting seedlings strong roots. After the seedling is fixed, irrigate the seedling stabilizing water in time, the quantity is not suitable to submerge the seedling. As the seedlings grow vigorously, the water demand gradually increases, and the watering interval time gradually decreases. Basically 5-7 times in shallow water during the whole growth period. The first three waters are watered once every 10 days or so, and the interval from four waters is 6-7 days. Always keep the soil moist and shallow before harvest.

Parsley pest control method

1. Chemical control of leaf spot disease. At the early stage of disease, 75% chlorothalonil or 50% carbomyl wettable powder 1000 times solution was sprayed once every 7 days for 2~3 times continuously, and the drug was stopped 7 days before harvest.

2. Chemical control of soft rot. At the initial stage of disease, 72% agricultural streptomycin, soluble powder or neophytomycin 3000 times solution can be sprayed continuously for 2~3 times, and the application should be stopped 3 days before harvest.

3. Chemical control of sclerotium disease. At the beginning of the disease, 50% Sukeling or Prohydantoin or 50% Nongliling WP can be sprayed 1000 times, once every 7 days, and continuously sprayed 3~4 times. Shed rooms can be smoked at night for 12 hours with 15% Pythium smoke agent or 45% Chlorothalonil smoke agent 0.5g per square meter.

Now because of the development of planting technology, coriander can be planted in all seasons. However, coriander is warm, so it is necessary to control the temperature when planting. After planting coriander, it is still necessary to do a good job in field management. Timely fertilizer and irrigation is necessary, but also to strengthen pest control. This way the coriander will grow well.