| Seasonal fluctuation of soil respiration with different ecosystems in the lower reaches of the Liaohe River Plain |
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| DOI：10.7606/j.issn.1000-7601.2010.01.23 |
| Key Words: soil respiration ecosystem seasonal fluctuation |
| Author Name | Affiliation | | YU Wantai | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China | | MA Qiang | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China | | SHEN Shanmin | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China | | ZHANG Lu | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China | | JIANG Zishao | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China |
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| Abstract: |
| Soil respiration is one of important sources of CO2 emitted from biosphere to atmosphere. Based on a long-term monitor results, seasonal fluctuation and main influence factors of soil respiration with different ecosystems in the lower reaches of the Liaohe River plain were analyzed. The results showed that there was a similar seasonal pattern for soil respiration with different ecosystems. The first peak value was in summer with suitable hydro
thermal condition, and the second was in autumn. Fertilization could increase soil respiration in agro-ecosystem and the highest soil respiration was in NPK+M treatment, followed by NPK, and the lowest in CK. Compared with CK treatment, soil respiration was increased by 70% and 40% for NPK+M and NPK treatments, respectively. Soil respiration in grass ecosystem was determined by the rate of organic materials returning and human activities. The changes of soil respiration intensity was mowing land＞waste land＞bare land. Although it had some residues backed to plantation ecosystem, soil respiration in plantation system was still lower than in agro-ecosystem and grass ecosystem. |
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