How to cultivate parsley out of season in summer and autumn?

Coriander, the scientific name coriander, a plant with special aroma, is generally used for food and has the effect of invigorating the stomach and digestion. Here let's take a look at how coriander is cultivated out of season in summer and autumn.

I. seed treatment

It is difficult for coriander seeds to germinate at high temperature. Soak the seeds with carbendazim 300x wettable powder for half an hour before cultivation, soak the seeds in clean cold water for about 20 hours, and then germinate under the condition of 20-25 ℃ before planting.

II. Soil preparation and fertilization

Select plots with convenient drainage and irrigation, loose and fertile soil, and turn 20-25 cm in time after the previous crop harvest and bask in the sun for 15 days. In order to facilitate the use of the sunshade net, a deep trench high border with a width of 120 cm, a height of 20 cm and a width of 30 cm is made. Coriander growth period is relatively short, combined with soil preparation, per mu of rotten mature human feces and urine 3500 kg, cake fertilizer 150kg, calcium magnesium phosphate fertilizer 50kg as base fertilizer, to fine and level the surface soil of the border to facilitate regular emergence of seedlings.

3. Farming in season

Coriander is cultivated out of season in summer and autumn, generally from mid-May to early July, with a seed consumption of 1 kg per mu, which can obtain higher output value and higher price. In the case of suitable soil moisture, cover 1-2 cm after uniform sowing. Cover the grass to protect the tide, protect the moisture and promote the seedlings, remove it after 5-7 days, and pay attention to maintain the soil moisture during this period.

IV. Field management

The summer and autumn atmosphere is getting higher and higher, which will affect the growth of coriander, so take off the grass and build a frame to cover the sunshade net in time. The sunshade net should adopt the method of covering by day and uncovering at night to strengthen ventilation and prevent seedlings from growing slender and causing diseases. Because the growth period of coriander is short, it is suitable for early weeding, early seedling and early topdressing of available nitrogen fertilizer.

Generally speaking, the seedlings should be carried out about 7 days after the full seedlings, and the seedlings should be fixed when there are 2 true leaves, and the seedling distance is 2-3 cm. Generally 8 days about one watering, seedling height of 3 cm to start topdressing, per mu topdressing 10-15 kg of urea and 250 grams of boron fertilizer. In the future, combined with sprinkling water, carbon ammonia or urea should be applied for 2-4 times, and in the later stage, appropriate amount of potassium dihydrogen phosphate should be increased to promote leaf growth.

V. Disease and pest control

The prevention and control of diseases and insect pests of pollution-free parsley should be based on the principle of giving priority to prevention and supplemented by treatment, and a variety of control methods should be combined to control diseases and insect pests to a minimum.

1. Agricultural control is based on species with strong disease resistance, implement crop rotation and prevent crop rotation. The diseased leaves of diseased plants in the field should be eradicated in time and the opportunity of bacterial infection should be reduced. Strengthen fertilizer and water management and improve plant disease resistance.

two。 Physical and biological control techniques such as frequency vibrating insecticidal lamp, sex attractant, Bt powder and so on.

3. Chemical control diseases mainly include seedling quenching disease, adult stage virus disease, anthracnose and spot blight. Five days after emergence, the 800-fold solution of pollution-free fungicide 3% polyoxane was sprayed once, and in the future, 600-fold liquid was sprayed once every 7 days, a total of 2-3 times, which can prevent quenching, anthracnose and spot blight. To prevent virus diseases, we can choose anti-insect nets to prevent aphids from flying in; shade to prevent high temperature and drought environment and reduce the occurrence of aphids; and 20% imidacloprid wettable powder 20 grams plus 50 kg of water foliar spray to completely control aphids and prevent the outbreak of virus diseases. Liriomyza huidobrensis was sprayed with 1500 times of avermectin.