First, choose high-quality varieties of cultivated parsley off-season, should be resistant to heat, disease resistance, strong resistance, large leafy parsley varieties.
Second, the seed treatment Coriander seeds germinate difficult under high temperature conditions, before sowing with 1% carbendazim WP 300 times solution soaked for half an hour after removing and washing, and then soaked with clean cold water for about 20 hours, then at 20 Seeds after germination at -25°C.
Third, flattening the fertilization of vegetable fields to choose the irrigation and irrigation water is convenient, soil loose and fertile planting plots, the former crop after harvesting timely deep-turn 20-25 cm, drying on the 15 days. In order to facilitate the use of shade nets, deep trenches with a width of 120 cm, a height of 20 cm and a groove width of 30 cm were made. Coriander growth period is short, combined with site preparation, per acre applied to compost manure excrement 3500 kg and cake fertilizer 150 kg, 50 kg of calcium magnesium phosphate fertilizer for basal, to the whole process of flattening vegetable soil, is conducive to neat emergence of parsley.
Fourth, timely sowing of parsley summer and autumn cultivation of parsley off-season, generally in mid-May to early July sowing, the amount of 1 kg per mu, both to obtain higher yields, but also to obtain a higher price. In the case of suitable soil moisture, spread 1-2 cm after uniform spreading. Covering the grass and mulching moisture to protect the seedlings, remove them after 5-7 days, and pay attention to maintaining the soil moisture.
5. As the management of the field is getting higher in summer and autumn, it will affect the growth of parsley. Therefore, after the grasshopper has been removed, it will be covered with a shade net in time. The sunshade net should adopt the method of daytime cover and night exposing to strengthen ventilation to prevent seedlings from growing thin and causing diseases. Parsley due to short growing period, early weeding, early seedlings, early recovery of fast-acting nitrogen fertilizer. Generally, the seedlings should be planted about 7 days after the seedlings, and 2 true leaves should be seedlings, and the seedlings should be 2-3 cm apart. Usually about 8 days to pour water once, when the seedling height is 3 centimeters, top dressing is started, and 10 to 15 kilograms of urea and 250 grams of boron fertilizer are applied per mu. After the combination of watering period, topdressing carbon ammonia or urea 2-4 times, when the late application of leaf surface fertilizer should be added an appropriate amount of potassium dihydrogen phosphate to promote leaf growth.
Sixth, pest control Pest prevention and control of pollution-free parsley should be based on the principle of prevention, treatment supplemented by the principle of a combination of a variety of control methods, the pests and diseases to a minimum extent. 1. Agricultural control is based on varieties with strong disease resistance, and rotation is adopted to avoid continuous cropping. Timely removal of diseased leaves in the field to reduce the chance of infection. Strengthen the management of fertilizers and water and improve the disease resistance of plants. 2. Physics and biological control applications such as frequency vibration type insecticide lamp, sex attractant, Bt powder and other physical control technologies. 3. Chemical control diseases mainly include seedling stage damping-off disease, adult stage virus disease, anthrax and spot blight. Five days after emergence, the non-pollution fungicide was sprayed with 800 times of 3% oxygenated oxygen for 1 time, and then sprayed with 600 times of polyoxo every 7 days for a total of 2-3 times to prevent damping-off. Anthracnose and spot blight. For the prevention of viral diseases, insect-resistant nets can be used to prevent locusts from flying in; shading can be used to avoid high-temperature and drought conditions and reduce the occurrence of aphids; and with 20% imidacloprid WP, ​​20 g of water and 50 kg of foliar spray to completely control aphids. Prevent the occurrence of viral diseases. Liriomyza was sprayed with 1% avermectin 1500 times.
7. About 40 days after sowing, it can be harvested. About 15 days before harvesting, spraying 20-25 ppm of gibberellin can make the leaves grow, the branches increase, and the yield is high.
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