The
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The appropriate design and setup of medcal gas equipment are essential for the
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pain of the gas station,Bed Head Unit,gas terminal, electrical system,nusre
call system, medical pipelines and auxilliary equipment system.
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1. Establish a seedbed and sow at the right time. The selection is closer to the cultivated land, the management is convenient, and the seedbed is established in the leeward sunny place. Seedbed can be built into an arch or bevel. The arched seedbeds are oriented from north to south, and the east-west arrangement is appropriate; the slope-shaped shape is oriented east-west and south-north. For ease of management, each bed is preferably 1-1.2 meters wide and 8-10 cm long. To use mature soil and manure without melons, mix thoroughly in 3:2 ratio, sifting and sifting as bed soil. After the seedbed is established, the sowing date is determined depending on the cultivar. In general, early maturing varieties should be sowed early, late maturing varieties can be properly sowed late; varieties with strong cold resistance should be sowed early; varieties with strong heat resistance can be sowed late; suitable protection facilities are suitable for early sowing, and direct broadcast in open field can be appropriate. Late broadcast.
2, control the seedbed temperature and humidity. The success or failure of nursery depends to a large extent on the suitability of the temperature and humidity control of the seedbed. Because the seedling temperature is too low, seedling growth is retarded, root growth is poor, it is easy to form small old seedlings; seedling temperature is too high, it will cause seedlings long, and make it form tall seedlings, thin seedlings. Seed bed temperature can be grasped: before sowing to emergence, sunny bed temperature is 28-30 °C, cloudy about 25 °C; after emergence, sunny days is 22-25 °C, cloudy days is 18-20 °C; when the first piece After the true leaf grows, the temperature is 25-27°C during the day and not less than 15°C during the night; in the first week before planting, the temperature of the seedlings is gradually reduced, and the bed temperature is lowered from 27°C to about 20°C until it matches the outside temperature. It is necessary to adjust the bed temperature to a suitable range by using technical measures such as uncovering the straw curtain, plastic film or opening vents. The relative humidity is maintained at 75-80%. Before emergence, to the cotyledon stage, no watering is required to protect the larvae. During the drought, water can be sprayed on the sunny morning to increase the humidity. After the second true leaf is exhibited, increase the amount of water spray and increase the number of sprays. 3-5 days spray 1 time. One week before planting, shoots should be controlled.
3, timely control of pests and diseases. Watermelon seedling pests mainly include blight, damping-off disease, rust root disease, and melons. In addition to the above-mentioned pests and diseases, in addition to strict seed disinfection when sowing, use of sterile soil as culture soil, application of fully decomposed manure, and control of suitable temperature and humidity of the seedbed, chemical control can be used 65% dexamethasone 700 times or 1000 times more bacteria Spirit liquid spraying diseased seedlings, control blight and damping-off; with 40% dimethoate emulsion 1000 times to prevent melons.
Second, sit Gua Guan
1, rational close planting. According to local production practices, Xincheng No. 1 is planted at a spacing of 1.8 meters, with a plant spacing of 0.5 meters and a density of about 740 plants per mu. Xiongnong No. 8 is planted at a spacing of 2 meters and a plant spacing of 0.7 meters. The density per mu is about 500 plants.
2. Determine the appropriate number of staying guaranties and fruits. The degree of staying in the melons has a great influence on fruit quality and yield. Practice has proved that the first melon and melon sitting on the melon, small melon, thick skin, poor quality, the second, the third melon child sitting melon, melon, shape, thin, good quality. Therefore, in the middle of the festival, we should choose to leave fruit and stalks with large peduncles and large and long ovary and melons. The number of fruit remaining per plant depends on the variety, cultivation season, and pruning method. Small melon varieties left 2-3 melons per plant, large melon varieties leave only 1 melon per plant; early spring cultivation can be more appropriate to stay melon, summer sowing can stay less melon; multi-vine pruning can stay more than 2 melons.
3, fertilizer and water management. The entire fruit development period, according to the requirements of the watermelon on the type of fertilizer, timely top-dressing watering. Otherwise, it will cause "fat melon" or fruit development delay and reduce the yield. Medium fertility, plots of 3,000 kilograms per mu, can be topdressed for 3 times during the sapling period; the first time before the fruit is de-greased (about 5 days after flowering), mainly nitrogen fertilizer, phosphate fertilizer and potassium fertilizer are auxiliary. In general, 20 kg of ammonium sulfate, 15 kg of superphosphate, and 2.5 kg of potassium sulfate are used. In combination with topdressing, the water was poured 1 time; the 2nd time after the fruit was dehaired to the fruit enlargement period, 30 kg of ammonium sulfate, 15 kg of superphosphate and 2.5 kg of potassium sulfate were applied. During this period, water should be poured once every 1 day and 2 times during drought to promote rapid fruit enlargement and increase the weight of single fruit. The third time was to apply extra-root fertilizer at about 10 days before harvesting, that is, spraying 0.3% potassium dihydrogen phosphate once every 3 days and spraying 3 times.
Third, the harvest off
First, the collection period is calculated based on the time of sitting. For example, Xincheng No. 1 grows from flowering to fruit ripening, about 35 days; Xinong No. 8 grows from flowering to fruit ripening, about 40 days. The second is to see and hear. Seeing that is based on watermelon skin color, pattern and other characteristics, distinguish watermelon ripeness. The mature mature watermelon has a bright skin with a pattern of darker colors and wider grooves. In addition, at the bottom of the melon (not seen in the sun), the epidermis turns to a yellowish color. Listening is to tap the skin gently, according to the sound of its response to distinguish watermelon cooked. In addition, attention should also be paid to the prevention and control of pests and diseases during the harvest of watermelons in order to ensure the occupancy rate. At this time, 1,000 times more thiophanate-methyl solution can be sprayed to prevent anthrax; spraying 40% dimethoate emulsion 900 times can prevent quail.
Watermelon to achieve high yields should be a good "three levels"
First, strong seedling clearance