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[1]GAO Jinfang,ZHOU Bo,MA Tao,et al.Soil Respiration Characteristics Under Different Land Use Patterns in Semi-arid Area[J].Research of Soil and Water Conservation,2017,24(02):89-93.

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Soil Respiration Characteristics Under Different Land Use Patterns in Semi-arid Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 02 Page number: 89-93 Column: Public date: 2017-04-28

Title:: Soil Respiration Characteristics Under Different Land Use Patterns in Semi-arid Area

Author(s):: GAO Jinfang, ZHOU Bo, MA Tao, ZHANG Feng, DONG Yanli, WANG Yanwu, YU Hui; Gansu Science Institute of Soil and Water Conservation, Lanzhou 730020, China

Keywords:: land use patterns; soil respiration; saline land; semi-arid area

CLC:: S714.5

DOI:: -

Abstract:: Soil respiration rates under the saline land, abandoned land and Medicago sativa land were measured by the closed-IRGA infrared CO₂ method, the differences in soil respiration in different land use patterns and the relationships between soil respiration, soil temperature and soil moisture were analyzed. The results showed that diurnal changes of soil respiration presented single peak curves and the changes of air temperature followed a similar trend, the soil respiration reached the maximum values when the soil temperature was close to the maxsimum; there were positive correlations between soil respiration and soil moisture, soil temperature under different land use patterns, the relationship between soil respiration and soil moisture content was linear. The exponential equation could present the relationship between soil respiration and near-surface air temperature, soil temperature at different depths better(p < 0.05), the significant variation of the Q₁₀ of soil respiration of abandoned land was observed, illustrating that the soil respiration was more sensitive to soil temperature, the values of Q₁₀ were significantly different in different soil depths; the values of Q₁₀ in saline land and Medicago sativa land at different soil depths were around 2.0, which was closed to the global average value. A two-variable soil respiration model (soil temperature and soil moisture) could explain the variations of soil respiration much better than mono-variable model under saline land, abandoned land and Medicago sativa land.

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