Forest soil respiration is also an important part of terrestrial ecosystem soil respiration. The carbon stored in soil is about 2.7 times that of atmospheric carbon, which is 4.3 times that of plant carbon. Therefore, relatively small changes in soil organic matter may affect land. The CO2 exchange between the ecosystem and the atmosphere has a significant effect.
The model construction of forest soil respiration is quite difficult. Inter-regional differences in soil respiration may become irregular due to slight differences in soil, temperature, and humidity. Therefore, in the process of studying soil respiration mechanism, there are many empirical formulas at different regional scales. These empirical formulas fully integrate local factors such as temperature, moisture, microorganisms, etc., and finally obtain suitable local soil respiration models by coupling various factors.
At present, the research on the construction of soil-breathing formulas mainly focuses on the effects of temperature and moisture, but the domestic related research mainly focuses on temperate forests in the north, but on the soil respiration and its influencing factors in tropical and subtropical forests in the south, especially in the subtropical forests. The research is less concerned. Based on field monitoring and analysis in the Jinggangshan Nature Reserve, this paper summarizes the daily variations of soil respiration in major forest types in the mid-subtropics and discusses the effects of soil temperature and humidity on soil respiration. The results of this study have enriched the experience of research on regional scale soil respiration in China. The model library provides data support for better exploration of the relationship between soil respiration and related factors.
Soil moisture temperature recorder for temperature and moisture measurement, the instrument includes a display and soil moisture sensor in two parts, some models of instruments can also be atmospheric temperature and humidity and dew point, soil temperature and humidity recorder is small, portable, with GPS Features.
The soil temperature and humidity is the most basic attribute of the soil. It directly affects the growth and survival of the plant. The soil temperature and humidity recorder can accurately measure the temperature and moisture content of the soil. How is the soil moisture and temperature in the forests of the subtropical zone? ? Forest ecosystems are more important today.