DOI: 10.1016/j.foreco.2016.09.035
Scopus记录号: 2-s2.0-84989332789
论文题名: Changes in soil organic carbon over 20 years after afforestation in semiarid SE Spain
作者: Segura C. ; Jiménez M.N. ; Nieto O. ; Navarro F.B. ; Fernández-Ondoño E.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 381 起始页码: 268
结束页码: 278
语种: 英语
英文关键词: Abandoned cropland
; Carbon sequestration
; Land-use change
; Pinus halepensis
; RothC
; Soil-preparation treatments
Scopus关键词: Crops
; Forestry
; Land use
; Organic carbon
; Reforestation
; Abandoned croplands
; Carbon sequestration
; Land-use change
; Pinus halepensis
; RothC
; Soil preparation
; Soils
; Pinus halepensis
英文摘要: This paper analyses the changes on SOC in semiarid abandoned farmland located in SE Spain partially afforested with Pinus halepensis Mill. in winter 1995–1996. The study tests the effects that 10 soil-preparation treatments before planting exerted on SOC, evaluates the effects of land-use change on SOC, and simulates SOC dynamics using the RothC model. The land-use changes studied were from cereal crops to abandoned croplands and from cereal crops to afforestation, in comparison to a native forest in equilibrium (maximum SOC reached). The results show that there were no differences in SOC among the soil-preparation treatments applied 20 years ago. An increasing mean SOC was recorded in the afforestation subplots. These increases were not always significant from one sampling period to another and were related to silvicultural practices and climate. SOC in the afforested land was influenced by the soil carbonate content (+), pH (−), and pine density (+). After 20 years, the mean SOC values in the afforested land were higher than in abandoned croplands and cereal crops (12.23 Mg C ha−1, 9.52 Mg C ha−1 and 8.02 Mg C ha−1, respectively) though no statistical differences were registered among these land uses. In all cases SOC differed with respect to the native pine forest, which showed 40.59 Mg C ha−1. Our results indicated that not enough time had elapsed to detect significant cumulative effects in SOC due to slow dynamics of carbon in the soil in the semiarid climate, the low inputs of organic matter to the soil and, probably, the low soil clay content in the study area. At the end of this study, the SOC in the afforested area was 69.9% less than in the native pine forest, indicating a clear potential for SOC sequestration in the following years. The RothC model was able to simulate the measured SOC increases due to the abandonment of agriculture and the afforestation of the cereal crops. In a 20-year model, we found a fit for the time course of SOC in abandoned croplands of RMSE < 10%, and a RMSE = 33% for the afforested area. Although the model in all cases overestimated the SOC measured, our results could be used as general indicators for predictions of the time course of SOC and potential carbon sequestration in semiarid afforested areas. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64656
Appears in Collections: 影响、适应和脆弱性
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作者单位: Dpto. Edafología y Química Agrícola, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, Spain; Dpto. Botánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, Spain; AGROECOSOST Research Group, Instituto de Investigación y Formación Agraria (IFAPA), Junta de Andalucía, Camino de Purchil s/n, Granada, Spain
Recommended Citation:
Segura C.,Jiménez M.N.,Nieto O.,et al. Changes in soil organic carbon over 20 years after afforestation in semiarid SE Spain[J]. Forest Ecology and Management,2016-01-01,381