Measurement items: The test was started from mid-June 2007. The soil temperature of 0 to 5 cm soil layer and 18 to 20 cm soil layer was measured every 5 to d days (recorded at 18:00 pm), and the humidity of 18 to 20 cm soil layer was measured at the same time. Soil temperature and humidity recorder determination. In November 2008, samples were taken to determine soil organic matter content (0 to 10 cm soil samples, potassium dichromate method);
Coverage treatment and methods: Set up four types of shrubs for treatment: rubble, turfgrass, wheat straw, and sawdust, and control the non-coverage (open field) as a control, and treat 3 plants each time. In the selected plant tree disk 50 ~ 80cm diameter coverage area, covering the thickness of gravel is 7 ~ 8cm thick, wheat straw, wood chips cover thickness 8 ~ 10cm;
Sampling: The sample selection and covering material tests were conducted at a university in Area A green space. In the green space, there were tree species such as Prunus triloba, jujube, skunk, juniper, lilac, spruce, and oriental arborvitae. 15 trees were randomly selected for tree cover.
Changes in soil temperature under the cover of the tree cover covered soil temperature changes of 0 ~ 5cm, 18 ~ 20cm soil layer. During the measurement period of soil temperature and humidity recorder (June-November), the soil temperature range of 0～5cm varies from 5°C to 33°C, the soil temperature range from 18-20cm varies from 7°C to 29°C, and the soil temperature decreases. Trend; 18 ~ 20cm soil temperature fluctuations less than 0 ~ 5cm soil temperature changes.
Widely used in the construction of foreign urban forestry, not only reduce the maintenance costs of green space, but also promote the development of circular economy, as well as positive environmental education significance. However, there are few reports on the study of tree cover and decoration of trees planted on green land in China. The above experimental study of the Soil Temperature and Humidity Recorder shows that wheat straw mulching and wood chip coverage can be used to better adjust the temperature and humidity in the soil, increase the content of organic matter, and increase the price of the organic matter. Generally, the effect of gravel and lawn covering on the temperature and humidity is adjusted. Ability is certain.
3Dimensional Channel H U I Beam Drilling & Band Sawing Machine for Steel Fabrication
Used for the drilling processing of H-shape steel, box beam and channel steel of steel structure, bridge, three dimensional garage and petrol platform. It is designed for medium size steel fabricators desiring to increase profitability and throughput (tons-per-month) in today's extremely competitive market.
1. Three spindle drilling, 3D drilling- Top, Left and Right; Can drill all holes one time, promise the precision.
2. This machine equip with the automatic feeding carriage system, can feed the workpieces to the machine automatically, also promise the precision.
3. With strong loading and unloading conveyors.
Packing & Delivery
Packing Details : Packing, this model need 1*40HQ + 1*20GP;
Delivery Details : 60-90 days after get the first payment.
1. Special logistics packaging
2. Suitable carton size
3. Fasten
4. Professional placement
5. Professional shock
6. Complete package
Our Certifications
SUNRISE is focus on quality and company's image. We win market with good quality and service. The company has already passed International Quality Management System ISO9001:2008 certification for many years and also got the CE certificate, smoothly got the title of High and New Tech Enterprises. And has more than ten own intellectual property rights and patent technology. We have own import and export right. Our products exported to Russia, South Asia, South east Asia, Middle East, South America, Africa, Australia, Eastern Europe etc.
Beam Sawing Machine,Sawing Machine For Beams,Band Saw Machine,Beam Cutting Machine
Shandong Sunrise CNC Machine Co., Ltd , http://www.scmcnc.com