The potential of Miscanthus to sequester carbon in soils: comparing field measurements in Carlow, Ireland to model predictions
The potential of Miscanthus to sequester carbon in soils: comparing field measurements in Carlow, Ireland to model predictions
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DOI：
10.1111/j.1757-1707.2010.01033.x
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发表时间：
2009-12-01
影响因子：
5.6
通讯作者：
Smith, Pete
中科院分区：
文献类型：
--
作者：
Dondini, Marta;Hastings, Astley;Smith, Pete
种植像芒草这样的生物能源作物有可能通过替代化石燃料和由于土地利用变化而在土壤中储存碳(C)来减少大气中的二氧化碳排放。在这里，我们比较了Carlow（爱尔兰）土壤有机C组分的直接测量结果与RothC和队列模型的模型预测结果。结果表明，在原耕地上种植芒草后，土壤有机碳会增加到高于天然草场的水平，因为芒草的有机物分解速度较慢。此外，我们还证明，对于测量的有机C，不同稳定性的分数与RothC中使用的C池相似。利用来自MISCANFOR的RothC和芒草产量的模型预测，我们预测，在爱尔兰，根据作物产量和初始土壤有机碳水平，将土地利用从可耕地改为芒草种植园有可能储存2至3 Mg C ha-1 y-1。
Growing bioenergy crops such as Miscanthus has the potential to mitigate atmospheric carbon dioxide emissions by the replacement of fossil fuels and by storing carbon (C) in the soil due to land use change. Here we compare direct measurements of soil organic C fractions made in Carlow (Ireland) to model predictions made by RothC and a cohort model. Our results show that when Miscanthus is grown on land previously under arable agriculture, the soil organic C will increase to a level above that of native pasture, as Miscanthus organic material is shown to have a slow decomposition rate. In addition we demonstrate that for measured organic C, fractions of different lability are similar to the C pools used in RothC. Using the model predictions from RothC and Miscanthus yields from MISCANFOR, we predict that in Ireland, changing the land use from arable to Miscanthus plantations has the potential to store between 2 and 3 Mg C ha-1 y-1 depending on the crop yield and the initial soil organic C level.