| 高寒草甸不同土地利用格局土壤CO2的释放量 |
| 摘要点击 994 全文点击 1245 投稿时间：2001-02-26 |
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| 中文关键词 高寒草甸 土地利用格局 CO2释放量 |
| 英文关键词 alpine meadow land use patterns values of carbon dioxide emission |
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| 中文摘要 |
| 分析高寒草甸不同土地利用格局下土壤CO2的释放量大小表明,在植物生长季的5～9月,土壤CO2释放量大小排序为:金露梅灌丛草甸(1871.40g/m2)＞矮嵩草草甸(1769.63g/m2)＞退化金露梅灌丛草甸(1495.60g/m2)＞退化矮嵩草草甸(1191.26g/m2);而在植物非生长季的10月到翌年4月,其土壤CO2释放量大小与植物生长季略有差异,表现出矮嵩草草甸(661.46g/m2)＞金露梅灌丛草甸(550.90g/m2)＞退化矮嵩草草甸(502.50g/m2)＞退化金露梅灌丛草甸(384.50g/m2)的特点;全年内表现为矮嵩草草甸(2431.09g/m2)＞金露梅灌丛草甸(2422.30g/m2)＞退化金露梅灌丛草甸(1880.10g/m2)＞退化矮嵩草草甸(1694.06g/m2).高寒草甸地区不同土地利用格局土壤CO2释放数量的差异及季节变化,不仅与各利用格局的土壤生物活性及土壤物理化学性状有关,而且与气象条件(特别是温度)及其土壤冬季冻结期长短关系极为密切.
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| 英文摘要 |
| The value order of carbon dioxide emission from different land use of alpine meadow was significantly with season changing.It was found that the Potentilla fruticosa shrub meadow(C,1871.40g/m2)> Kobresia humilis meadow(A,1769.63g/m2)>Degraded Potentilla fruticosa shrub meadow(D,1495.60g/m2)>Degraded Kobresia humilis meadow(B,1191.26g/m2) during growth season,A(661.46g/m2)>C(550.90g/m2)>B(502.50g/m2)>D(384.50g/m2) in rest period;and A(2431.09g/m2)>C(2422.30g/m2)>D(1880.10g/m2)>B(1694.06g/m2) for whole year,separately.This deference not only decided the soil microbial activity and soil characters,but also have the closely relationship to shortage of frozen period. |
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