Out-of-season cultivation techniques of parsley with high yield and high benefit in summer and autumn

Out-of-season cultivation of coriander has high yield and high benefit. Now share the cultivation techniques of coriander with vegetable farmers.

Parsley

First, the selection of varieties. The varieties of parsley cultivated in off-season should be heat-resistant, disease-resistant, stress-resistant and big-leaf type.

Second, seed treatment. It is difficult for coriander seeds to germinate at high temperature. Soak the seeds with carbendazim 300x solution for half an hour before sowing, then soak the seeds in clean cold water for about 20 hours, then sprout at a temperature of 20-25 ℃, and finally sow the seeds.

Third, soil preparation and fertilization. Choose the land with convenient drainage and irrigation, loose and fertile soil to grow coriander, and turn the plot 20-25 cm deep after the previous crop harvest and bask in the sun for 15 days. The field bed is made into a deep trench and high border with a width of 120 cm, a height of 20 cm and a width of 30 cm to facilitate the use of sunshade nets. The growing period of coriander is relatively short, combined with soil preparation, 3500 kg of mature human feces and urine, 150kg of cake fertilizer and 50kg of calcium magnesium phosphate fertilizer are applied per mu as base fertilizer, and the surface soil of the border should be fine and flat to facilitate the emergence of seedlings.

Fourth, sow seeds at the right time. Generally sowing out-of-season coriander from mid-May to early July, with a seed amount of 1 kg per mu. After evenly sowing, cover 1-2 cm of grass. The purpose of covering the grass is to preserve the tide, preserve moisture and promote seedlings, and remove it 5-7 days later, paying attention to maintaining the moisture of the soil in the meantime.

Fifth, field management. The high temperature in summer and autumn will affect the growth of coriander, so the sunshade net should be covered in time after the grass is removed. The sunshade net is covered during the day and uncovered at night to strengthen ventilation to prevent coriander seedlings from growing thin and causing diseases. Because of the short growing period, coriander is suitable for early weeding, early seedling and early topdressing of available nitrogen fertilizer. Generally, 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. Usually water parsley once in about 8 days. When the cilantro seedlings are 3 cm high, they begin to topdressing, topdressing 10-15 kg of urea and 250 grams of boron fertilizer per mu. After that, combined with watering, carbon ammonia or urea should be applied for 2-4 times, and an appropriate amount of potassium dihydrogen phosphate should be added to the foliar fertilizer in the later stage to promote leaf growth.

Sixth, disease and pest control. 1. Agricultural control: select cilantro varieties with strong disease resistance, implement crop rotation and avoid continuous cropping. The diseased leaves of diseased plants in the field were removed in time. Strengthen fertilizer and water management to improve the disease resistance of coriander. 2. Physical and biological control: frequency vibrating insecticidal lamp, sex attractant, Bt powder and so on. 3. Chemical control: quenching disease, virus disease, anthracnose and spot blight are the main diseases of coriander. Five days after emergence, spray 800 times of 3% polyoxic solution once, and then spray 600 times of liquid every 7 days for a total of 2-3 times, which can prevent quenching, anthracnose and spot blight. To prevent virus diseases, insect control nets can be used to prevent aphids from flying in; shading methods can be used to reduce the occurrence of aphids; and 20 grams of imidacloprid wettable powder 20 grams plus 50 kg of water can be sprayed on leaves to thoroughly control aphids. Control Liriomyza huidobrensis with 1% avermectin 1500 times liquid spray.

7. Harvest. Coriander can be harvested after sowing for about 40 days. 15 days before harvest, the spraying concentration of gibberellin was 20-25, which could make the leaves elongate, increase the branches and increase the yield.