摘要
本文采用静态碱液(NaOH溶液)吸收法来测定赣南红壤地区不同土地利用方式下的土壤呼吸,总结其释放规律。研究表明,农田和旱地的的CO2释放量均为正值,但是CO2的释放量存在着区别,同时这两种土地利用类型土壤呼吸都有明显的日变化和季节变化,并且土壤呼吸与温度的变化有相关性。通过模拟,农田和旱地土壤呼吸与土温有较好的指数关系,并且通过计算:农田和旱地的土壤呼吸对温度的敏感性(Q10)存在差异,农田和旱地对地下5cm处土温的敏感性分别为3.66、5.56,农田的Q10值要小于旱地。
The alkali（NaOH solution） absorption technique was used in this paper to measure the soil respiration of the red soil land under different land-use types in GanNan area.After the experiments,work out the law of the release.The selected land-use types are farmland and dry land.The study shows that the CO2 emissions of different land-use types are positive,but there is a difference between them.Moreover,to the same land use types,the soil respiration has obvious daily and seasonal change characters.Experimental results also show that,CO2 emission are closely related to the temperature,and through calculation,we can find there is a difference in temperature sensitivity of soil respiration（often expressed as Q10） between farmland and dry land,Q10 value 5cm below the ground are 3.66 and 5.56 respectively,besides,the Q10 value of the dryland is larger than that of the farmland.
出处
《国土与自然资源研究》
2012年第5期28-29,共2页
Territory & Natural Resources Study
基金
江西省教育厅科技项目(GIJ10588)
关键词
土壤呼吸
农田
旱地
Q10值
soil respiration
farmland
dryland
Q10 value
