Subsidence rates and carbon loss in peat soils following conversion to pasture in the Waikato Region, New Zealand
Subsidence rates and carbon loss in peat soils following conversion to pasture in the Waikato Region, New Zealand
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新西兰怀卡托地区泥炭土转为牧场后的沉降率和碳损失
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. McLeod
中科院分区：
文献类型：
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作者：
L. Schipper;M. McLeod
抽象。由于泥炭的氧化，农业泥炭土壤的排水会导致大量的碳损失。我们估计泥炭沉降率和总的碳损失，由于40年的奶牛养殖前泥炭沼泽，通过测量泥炭的厚度和总碳的农田和相邻的未经修改的泥炭沼泽上面的标记火山灰层，沉积约200 AD。沉降速率平均为3.4 cm/年（95%置信区间为3.2至3.5 cm/年），碳损失平均为3.7 t ha/年（95%置信区间为2.5至5.0 t ha/年）。平均而言，63%的沉降是由于固结，其余的（37%）归因于有机质的损失，由于泥炭矿化。
Abstract. Drainage of peat soils for agriculture can lead to large carbon losses due to oxidation of peat. We estimated peat subsidence rates and total carbon losses, due to 40 years of dairy farming on a former peat bog, by measuring the thickness of peat and total carbon of farmland and of an adjacent unmodified peat bog above a marker tephra layer that was deposited about 200 AD. Subsidence rates averaged 3.4 cm yr–1 (95% confidence interval of 3.2 to 3.5 cm yr–1) and carbon loss averaged 3.7 t ha–1 yr–1 (95% confidence interval of 2.5 to 5.0 t ha–1 yr–1). On average, 63% of the subsidence was due to consolidation, with the remainder (37%) attributed to losses of organic matter due to peat mineralization.