Sweet corn cropping techniques and precautions

I. Planting techniques 1. Seedlings in seed treatment Seeds soaked in cold water for 6-7 hours and then primed with a damp cloth at 20-25°C to germinate to 80% of the seed's whiteness, germinating 3-4 days. 2. Seedbed preparation Nursery bed is selected as a bed with high topography and well-drained land, and 2,000 kg of compost organic fertilizer per acre is used as a base fertilizer 5-7 days before sowing. After the application, the deep-turning tillage shall be fully mixed with the fertilizer and the soil, the flattening shall be completed, and the plastic film shall be covered for waiting for sowing. 3. Seeding and sowing The seedlings should be covered with small open sheds in open field. When sowing, first open the seedlings on the membrane, and then pour the bottom water. After the water is soaked, mix the seeds with a small amount of fine sand or fine soil and spread them after mixing. 10-30 square meters sowing seeds 25-30 grams. After sowing, sprinkle a thin layer of soil and catch the black shading net. Watering sooner or later to keep the bed moist, until the seedlings unearthed, shady net early exposing late cover, proper ventilation, keep the bed temperature 12-20 °C during the day, night 5-8 °C, 2-3 true leaf time seedlings once , Maturation up to 40 days can be transplanted, pay attention to hardening seedlings before transplanting. 4. The field plots for planting shoots and shoots were deep-turned 15 days in advance. When the site preparation was completed, shallow ploughing was required. Apply 2,000 kg of fully organic fertilizer per acre, and apply 50 kg of superphosphate per acre. Potassium sulfate 20 Kilograms are basal fertilizers. After fertilization, tillers are ploughed to make the fertilizer and the soil fully mixed. Then the burrows are opened every 220 centimeters, with a groove width of 20 centimeters and a ditch depth of 30 centimeters. The mulch is covered with a plastic film and the plastic film is compacted on both sides with soil. 5. Planting specifications Planting width: 2m; Row ratio: 2:4, ie 2 rows of corn, 4 rows of shoots. Maize specification: Maize seedlings are planted on each side of the planting surface with a spacing of 28cm (1 per pond, 2300 plants per mu. Wozi specifications: 35cm (plant spacing) 35cm (row spacing), 5000 plants/mu. 6. Field management (1) In case of drought, ground irrigation should be used to promote easing of seedlings and irrigation should be carried out in the evening, and planting should be carried out for 15 to 20 days to apply 25 kg of compound fertilizer per acre, cultivating after irrigation and promoting root expansion. 25 times of compound fertilizer, during the growth of the whole shoot, the moisture content is mainly moist, and attention should be paid to timely drainage and drought prevention (2) 10 kg of urea per acre when the sweet corn grows to the jointing stage and the big bell stage. Potassium sulphate 10 kg, to facilitate the later growth and development of sweet corn, to promote full and full, to achieve the purpose of high yield 7. Pest control pests and shoots 10 to 15 days after planting, insert 30 to 40 per mu, blue plate (3040 cm ) The use of yellow and blue plates to kill aphids can greatly reduce the incidence of viral diseases. In the prevention and control of pharmaceuticals, strict prevention of pesticide use and safety intervals are the main priorities: lettuce downy mildew, 75% chlorothalonil wettable powder 600-800 times spray. Initially sprayed with 20% Virus A WP 500 times. Lettuce Sclerotinia, sprayed with 70% thiophanate-methyl WP 700 times. Lettuce black spot, with 50% acetaminophen wettable powder 1500 Double liquid spray: The corn armyworm can be controlled by 90% of trichlorfon or 2.5% of deltamethrin 1000 times.. 8. timely harvesting (1) fresh sweet corn can be harvested after 25 days of silk drawing (2) When the top of the lettuce is at the level of the tip of the tallest blade, it is suitable for harvesting the stem of the lettuce.Second, the matters needing attention Winter planting should pay attention to extreme weather, mainly cold weather, the wind, frost disaster caused by the cold wave has to agriculture Great influence.

Aluminium Steel Co2 Fire Extinguisher

Aluminium Steel Co2 Fire Extinguisher,Portable Co2 Fire Extinguisher,Co2 Portable Fire Extinguisher,Aluminium Alloy Portable Fire Extinguisher

JIANGSU NEW FIRE FIGHTING TECHNOLOGY CO.,LTD , https://www.newayfire.com