Verlinden M S, Broeckx L S, Wei H, Ceulemans R
Department of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Department of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium ; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Science, 723 Xingke Road, Tianhe District Guangzhou, 510650 People's Republic of China.
Plant Soil. 2013;369(1-2):631-644. doi: 10.1007/s11104-013-1604-5. Epub 2013 Jan 31.
In this study we quantified the annual soil CO efflux (annual SCE) of a short rotation coppice plantation in its establishment phase. We aimed to examine the effect of former (agricultural) land use type, inter-row spacing and genotype.
Annual SCE was quantified during the second growth year of the establishment rotation in a large scale poplar plantation in Flanders. Automated chambers were distributed over the two former land use types, the two different inter-row spacings and under two poplar genotypes. Additional measurements of C, N, P, K, Mg, Ca and Na concentrations of the soil, pH, bulk density, fine root biomass, microbial biomass C, soil mineralization rate, distance to trees and tree diameters were performed at the end of the second growth year.
Total carbon loss from soil CO efflux was valued at 589 g m yr. Annual SCE was higher in former pasture as compared to cropland, higher in the narrow than in the wider inter-row spacings, but no effect of genotype was found.
Spatial differences in site characteristics are of great importance for understanding the effect of ecosystem management and land use change on soil respiration processes and need to be taken into account in modeling efforts of the carbon balance.
在本研究中，我们对短轮伐期萌生林人工林在其建立阶段的年土壤CO排放通量（年SCE）进行了量化。我们旨在研究前（农业）土地利用类型、行距和基因型的影响。
在佛兰德的一个大型杨树人工林中，在建立轮伐期的第二个生长年对年SCE进行了量化。自动气室分布在两种前土地利用类型、两种不同行距以及两种杨树基因型下。在第二个生长年结束时，还对土壤中C、N、P、K、Mg、Ca和Na的浓度、pH值、容重、细根生物量、微生物生物量C、土壤矿化率、到树木的距离和树木直径进行了测量。
土壤CO排放通量造成的总碳损失估计为589 g m² yr⁻¹。与农田相比，前牧场的年SCE更高，窄行距的年SCE高于宽行距，但未发现基因型的影响。
场地特征的空间差异对于理解生态系统管理和土地利用变化对土壤呼吸过程的影响非常重要，并且在碳平衡建模工作中需要加以考虑。
