在沙漠沙漠的土地上,植被覆盖控制了土地间的土壤温度演变
Shuai He1, Chengfu Zhang1, Fan-Rui Meng2
1College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, People's Republic of China.
The Science of the total environment
|November 12, 2023
概括
植被显著影响干旱地区的土壤温度. 增加植被覆盖降低了土壤温度,减少了深,并可能减轻风侵蚀,同时保护昆虫免受结.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 表面植被在调节土壤温度 (ST) 中起着至关重要的作用,但其精确的影响和微气候反仍然不清楚,特别是在干旱和半干旱的环境中.
- 长期的现场环境数据很少,这阻碍了对植被-土壤温度相互作用的全面理解.
研究的目的:
- 研究不同植被覆盖面对土壤温度概况和微气候动态的影响.
- 在沙漠生态系统中量化植被对季节性ST变化,冰深度和解期持续时间的影响.
主要方法:
- 在中国的穆乌斯沙漠进行了一项为期两年的实地研究,将一个裸露的沙丘 (BF) 与两个植被地 (中等覆盖面,MF;高覆盖面,HF) 进行比较.
- 使用一系列在土壤顶部180厘米内的传感器测量了垂直的土壤温度概况.
- 开发并验证了一种两方程模型,以模拟每日平均土壤温度.
主要成果:
- 植被地区 (MF和HF) 在解期间表现出较低的平均土壤温度 (1.2-1.6°C下降) 和在结期间略高的温度 (0.1-1°C增加) 与裸露地区相比.
- 季节性ST变化的幅度减少了2.4°C (MF) 和4.9°C (HF).
- 植被地区的年平均ST降低 (1.2-1.6°C低于BF),差异与植被覆盖面,叶面积指数,生物质和 litter 厚度呈指数相关. 高层覆盖减少了30厘米的深,并将解期延长了1-35天.
结论:
- 植被覆盖在干旱环境中显著改变了土壤温度制度,导致年平均温度降低,季节性波动减少.
- 这些ST修改对动力学有影响,可能会保护过冬的昆虫,并影响垃圾分解率,这可能会影响风侵蚀控制.
相关概念视频
Adaptations that Reduce Water Loss
25.6K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.6K
Responses to Heat and Cold Stress
13.5K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.5K
The Soil Ecosystem
20.1K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
20.1K
Radiation: Applications
1.2K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.2K
Regulation of Transpiration by Stomata
28.3K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
28.3K
Specific Heat
62.2K
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
62.2K


