[1]MA Tao,ZHOU Jin-xing.Studies on Soil Respiration Change and Its Relation with Environmental Factors in Poplar Plantation on Beach Land[J].Research of Soil and Water Conservation,2011,18(06):31-36,41.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
18
Number of periods:
2011 06
Page number:
31-36,41
Column:
Public date:
2011-12-20
- Title:
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Studies on Soil Respiration Change and Its Relation with Environmental Factors in Poplar Plantation on Beach Land
- Author(s):
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MA Tao1, ZHOU Jin-xing2
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1. Gansu Institute of Soil and Water Conservation, Lanzhou 730020, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
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- Keywords:
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poplar plantation; soil respiration; environmental factors; Q10 value; beach land
- CLC:
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S715.71;S154.4
- DOI:
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- Abstract:
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In order to reveal the soil respiration change and its relation with environmental factors, soil CO2 emission rates in artificial poplar plantation on Beach Land were investigated by using Infra Red Gas Analysis(IRGA) technique, and the soil respiration changes in relation to environmental factors such as temperature, soil water content and vegetation structure underforest were analyzed. The results showed that the diurnal dynamics of soil respiration presented a single peak curve with the maximum occurring around 11:00-13:00. The order of soil CO2 emission rates is Jun-2006>Oct-2005>Mar-2006>Oct-2006. The mean value of efflux is 2.29±0.75 μmol/(m2·s)(P<0.05, n=13) and a coefficient of variation is 54.40%. The sensitivity of the soil respiration to the temperature above ground is superior to the soil temperature at 5 cm. The Temperature susceptibility indexes Q10 value is 1.28±0.79(P<0.05, n=13), which is less than the global level except for beach land. The relationship between soil moisture and soil respiration is not good, so the soil moisture is not the limitational factor to the efflux of CO2. The vegetation structure is also the one influence factor controlling soil respiration.