1. Weeding in weeds: For the perennial flower beds that have not been closed, the growing season (April-October) should be loosened once a month. Except for weeds once, the depth of loose soil is generally 3-5cm. Root system; weeds should be removed once a month in the non-growth season, and roots should be removed; the surrounding lawn should be prevented from growing into the flower beds, affecting the growth of the flower beds and the beautiful environment.
2, trimming and trimming: Generally, it is cut once every 2-3 months, 30-50cm is reserved to promote the germination of the side branches, and then the monthly trimming shape according to the standard of flower bed maintenance, generally high in the middle, low on both sides, generally no more than 80cm in the middle, Form a curved surface and have a good garden effect. The flowering period is trimmed once every 3-5 days, and the leaves are cleared once. The trimming is carried out in April-May and August-September every year. The trimming width is 20-30cm, and the lines should be smooth.
3. Fertilization: After heavy cutting in 2-3 months, the organic fertilizer is applied as the base fertilizer, 0.5-1kg/m2, combined with loose soil, the fertilizer is buried in the soil, water is poured once, and then compound fertilizer is used according to the growth condition (N P, K ratio is 2:6:3) 1-2 times of topdressing, combined with raining days 15-20g/m2; sunny fertilization should ensure that the water is poured, mainly by application.
4. Replanting and watering: The dead seedlings caused by construction, traffic accidents, improper maintenance, etc. should be replanted in time. Generally, the original types should be replenished, and the specifications should be similar to the original. Immediately after replanting, pour water once, refill once every 24 hours, and then water again after three days. After that, it will enter normal management, and it can be poured 1-2 times a week. In special drought period, it should be properly hydrated.
5, quality control: flower bed without missing plants, defective; strong growth, no pests and diseases; pruning shape must have a certain garden effect; flowering plants, flowering on time, gorgeous, flower coverage rate of 50% or more; soil loose, no weeds.
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Roundness Measuring Instruments
Roundness meter is a length measuring tool for measuring roundness using the rotary axis method. The roundness meter is a measuring tool for measuring the roundness error of the workpiece using the rotary axis method. Roundness tester is divided into two types: sensor rotary type and workbench rotary type. During measurement, the measured part is installed concentrically with the precision shaft system, and the precision shaft is attached with an inductive length sensor or a workbench for precise circular motion. It is composed of sensor, amplifier, filter and output device of the instrument. If the instrument is equipped with a computer, the computer is also included in the system.Roundness Tester
The principle of the roundness meter is the same as that of the coordinate measuring machine. In fact, its working principle is very simple. The coordinate measuring machine is a point acquisition tool. Its principle is to collect points first, and then form a line from points, and then form a three-dimensional model from lines. CMM is a kind of measuring equipment that has a guiding mechanism, a length measuring element, a digital display device in three mutually perpendicular directions, and a worktable that can place the workpiece (not necessarily large or huge). The measuring head can be moved to the measured point easily by manual or motorized means, and the coordinate value of the measured point is displayed by the reading device and the digital display device. Obviously, this is the simplest and most primitive measuring machine. With this measuring machine, the coordinate value of any point in the measured volume can be displayed through the reading device and digital display device.
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