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First, the nursery chooses the nursery to choose to be on the top of the land, and the soil is loose and fertile. Before winter, pour water and deepen. In late March, the site was set up and covered with plastic film. It is best to lay the north and south direction of the mulch to facilitate the seedlings to receive the light evenly. The mulch requires paving and strict sealing. Two to three days before sowing, the layered seeds are placed in a greenhouse or indoors for germination, and the germinated seeds are picked for broadcast.
Second, seeding artificial holes in the film. The required spacing is 3 to 5 cm, the hole depth is 2 to 4 cm, the aperture is 5 cm, the row spacing is wide and narrow, the narrow row is 30 cm, and the width is 60 to 70 cm. Seeding is to sow the germinated seeds in the hole, one or two holes. Cover the seed with 2 cm thick wet fine soil and seal the hole. In order to ensure the quality of sowing and the emergence of seedlings, the seeds do not germinate and do not sow. Planting should be advanced in early April. When the weather is fine after sowing, the seedlings will be pushed out of the mulch in 4 to 5 days, and the seedlings will be released in 7 to 10 days. Check the seedlings every day and timely release the top soil seedlings to prevent the seedlings from bending in the mulch or be burned.
Third, seedling management The initial management of the seedlings is extremely important to promote the rootstock to prosper in the early stage. In addition to the use of mulching, extra-root dressing is also required. When the stock is grown to 5 to 8 cm, 0.5% potassium dihydrogen phosphate is used. Add 0.2% urea foliar spray 6 external dressing 2 to 3 times, each time about 20 days apart. In early June, when the rootstock grows to 20 centimeters, it picks up all the hearts and promotes rooting and thickening.
Some key features may help:
Accuracy: ±3~5cm(<50m) /±1%(>50m)
Range: 0.1-200m
Resolution: 1cm
Frequency: 100/200/400/1k/5k/10khz
Laser type: 905nm,Class I
Size: 43*35*21mm
Weight: 20g
Input voltage: 8-36V