Soil organic carbon stock assessment for the different cropland land uses in Italy

被引:33
|
作者
Chiti, Tommaso [1 ]
Gardin, Lorenzo [1 ,2 ]
Perugini, Lucia
Quaratino, Roberta [1 ]
Vaccari, Francesco Primo [3 ]
Miglietta, Franco [3 ,4 ]
Valentini, Riccardo [1 ]
机构
[1] Univ Tuscia, Dipartimento Sci Ambiente Forestale & Risorse DIS, I-01100 Viterbo, Italy
[2] Studio Gardin, I-50132 Florence, Italy
[3] Consiglio Nazl Ric CNR, Ist Biometeorol Ibimet, I-50145 Florence, Italy
[4] FoxLab Fondaz E Mach, I-38010 Trento, Italy
关键词
Croplands; Land use; Mitigation options; Kyoto protocol; SOC stock; LONG-TERM EXPERIMENTS; ARABLE SOILS; AGRICULTURAL SOILS; SEQUESTRATION; TOPSOIL; SCALE;
D O I
10.1007/s00374-011-0599-4
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
The aim of this work was to quantify the soil organic C (SOC) stock in the top 30 cm of mineral soil for the whole Italian territory, according to the different land use types of the Intergovernmental Panel on Climate Change (IPCC) cropland category (arable land, agroforestry, vineyards, olive groves, orchards and rice fields), as a basis for future land use scenarios and to address mitigation policy at country level. A database for SOC stock was created with the data from the national project denominated SIAS and partly from regional map reports. All data were referred to the year 2000 since they were derived from surveys conducted from 1995 to 2005. The data were stratified according to the Italian climatic regions, the landscape position and the IPCC cropland subcategories. Taking into account the uncertainty in the estimate, the mean SOC stock values of the different subcategories show significant differences (p < 0.05) among climatic regions and landscapes, ranging from 41.9 +/- 15.9 Mg C ha(-1) in the vineyards to 63.3 +/- 27.9 Mg C ha(-1) in the rice fields. Generally, a small decrease of the SOC stock from the temperate regions toward the Mediterranean ones is observed. Taking into account the mean value of each subcategory and the country area they occupied in 2000, the total C stored in the upper 30 cm of soil was estimated at 490.0 +/- 121.7 Tg C. The resulting estimate represents the 17% of the value reported by another study for the soil of the whole country down to 50 cm depth, suggesting the importance of preserving this large C pool. Considering the cropland category as a whole, the estimated mean SOC stock is 52.1 +/- 17.4 Mg C ha(-1), similar to that reported for other European countries, 50-60 Mg C ha(-1). In conclusion, the assessment of the mean SOC stock of the different cropland land uses, landscape position and climate regions could notably help when assessing the impact of different agricultural practices and future stock change evaluation.
引用
收藏
页码:9 / 17
页数:9
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