Expeirments Of Study On The Response Of Physical And Chemical Properties Of Tundra Soil To Warming In Changbai Mountain

With global warming increasingly serious, the response of the surface soil is alsoconcerned. Especially in high latitude and high altitude, the response is more andmore serious, and the study of the response is particularly important. The studyprovides basic data for the nature reserve, and further explores the evolution of theecological system of tundra in changbai mountain. This article selects the tundra soilof changbai mountain as the research object, and artificially simulates atmosphericwarming by using the gas chamber (OTC), and together with the experiment, anddraws the following conclusion through a short-term experiment in a growing season:(1)The response of air temperature to warming room is significant, the averagetemperature of air increases1.21, and the average temperature of soil increases0.63. The warming effect is different in different weather, the best is in the sunny,the average temperature of air increases2, and the average temperature of soilincreases1above. For the temperature of soil, the raisin temperature is reducedwith the increase of the depth of soil. In a word, the warming effect of the surface ofthe earth is the best.(2)When the warming room built a new environment of soil, the physical andchemical properties of soil changes corresponding. As the increasing of thetemperature of soil, the water content of the soil decreased3%, and the change ofthem presents a linear relation; the pH of soil has no change; the organic matter,available P and available N of the soil decreased with the increasing of thetemperature, but only the change of available N and temperature presents linearcorrelation.(3)The warming effect and the physical and chemical of the soil are different indifferent warming room. Overall, the warming effect is more significant in warmingroom of Vaccinium uliginosum var.alpinum. Of course, the differences of warmingeffect affect the change of soil physical and chemical properties directly, soil moisture,soil available N and P significantly different, organic matter changes are alsodifferent.