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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.
Soil Temperature and Humidity Recorder Analyzes Soil Differences in Different Covering Modes
Organic surface coverage (covered with bark, branches, wood chips, leaves, straw, etc.) has the function of improving soil function, promoting tree growth, dust prevention, and decorative tree trays. It is made of gravel, lawn, wheat straw, and wood chips. Cover materials, through the soil temperature and humidity recorder to determine the effect of different cover treatments on the soil temperature and humidity and organic matter content of green space, in order to screen the appropriate local coverage materials, in order to provide a reference for urban forestry construction.