The seeds were rinsed with tap water and placed in a germination box with tap water as the matrix. The seeds of Lilium davidii were pretreated with hot water (35e and 50e) for 1 h, outdoor natural light temperature, and outdoor dark natural temperature treatment before germination. The treatment time was 60 days (1 to 2 months). In the outdoor natural light treatment, seeds are packed in gauze bags. Light treatment is to seed the seed germination box. Illumination time was 24 and 12 hours (6:00~18:00), and the light intensity was 9000lx. The temperature is a constant temperature (20?1) e and temperature change: 昼(6:00~18:00)(20?1)e, night (18:00~6:00)(10?1)e. In the light-proof treatment, the seeds were placed in a seed germination box and an electrothermal incubator, and the temperature was 12, 20, and 25e, respectively. The germination condition was observed regularly and the germinated roots exposed with 1 mm seed coat as a sign of germination.
Through the test analysis of seed germination boxes and other instruments, the seed germination rate is related to the above-mentioned environmental factors, and may also be related to the seed's own characteristics. For example, in the same fruit, the 1000-grain weight of different parts of seed is light to heavy, and the seed germination rate is Upward trend. The highest seed germination rate was only 58%, while the seed germination rate of other plants in Liliaceae was much higher than that of Dali seed. The reason for this may be related to the genetic characteristics of the plant. In general, the reproductive efficacy has a stable genetic character, and it takes 5 to 8 years from the seeding to seed setting of the seed of Lilium davidii. It can be seen that the germination of the lily seed itself is not strong.
Overview of Steel Bar Cutting Machine
The steel Bar Cutting Machine is a kind of tool used to shear steel bars.
There are automatic steel cutting machine and semi-automatic steel cutting machine.
It is one of the necessary equipment for steel rebar processing, and it is mainly used to cut off the length of rebar in buildings, Bridges, tunnels, power stations and large water conservancy projects.
Compared with other cutting equipment, the steel bar cutting machine has the characteristics of light weight, less energy consumption, reliable work and high efficiency. Therefore, it has been widely used in mechanical processing and small rolling mills in recent years, playing an important role in various fields of national economic construction.
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