Impact of the conversion of Brazilian woodland savanna (cerradao) to pasture and Eucalyptus plantations on soil nitrogen mineralization

被引:16
|
作者
Lopez-Poma, Rosario [1 ,2 ]
Pivello, Vania R. [3 ]
de Brito, Gisele S. [3 ]
Bautista, Susana [1 ,2 ]
机构
[1] Univ Alicante, Dept Ecol, Alicante, Spain
[2] Univ Alicante, IMEM, Alicante, Spain
[3] Univ Sao Paulo, Inst Biosci, Dept Ecol, Sao Paulo, SP, Brazil
关键词
Cerrado; Eucalyptus plantation; Land use change; Nitrogen cycling; Soil enzyme activity; Urochloa pasture; LAND-USE CHANGE; COMMUNITY STRUCTURE; MICROBIAL BIOMASS; COLORIMETRIC DETERMINATION; ENZYME-ACTIVITIES; TROPICAL FORESTS; UREASE ACTIVITY; ORGANIC-MATTER; CARBON; FIRE;
D O I
10.1016/j.scitotenv.2019.135397
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The Brazilian savanna (Cerrado) has been extensively converted to croplands, pastures and forestry plantations, and the deforestation frontier continues expanding. Land conversion may cause critical changes in soil functioning, yet very little is still known about the impact of Cerrado conversion on nutrient cycling and soil fertility. Here, we addressed this knowledge gap by investigating the effects of the woodland cerrado (cerradao) conversion into pastures and Eucalyptus plantations on nitrogen availability and mineralization potential, considering a wide range of spatial and temporal variability due to soil depth, site conditions, and seasonal variation. For three sites in Sao Paulo state and each of the target land cover types, we assessed the total N and inorganic N (NH4-N and NO3-N) pools, potentially mineralizable nitrogen (PMN) and soil urease activity in the first 2 m of the soil profile. Cerrado conversion to either pastures or Eucalyptus plantations significantly reduced NH4-N, while NO3-N showed similar values in Cerrado and Eucalyptus and lower values in pastures. We found a consistent pattern of lower N mineralization in the uppermost soil layers associated to Cerrado conversion, with decreases in PMN rate and urease activity. The soil below 30 cm depth showed no relevant changes. Considering the first 30 cm of the soil profile, the reduction in the stocks of inorganic N (NH4-N + NO3-N) ranged from similar to 14% for the conversion to Eucalyptus to similar to 20% for the conversion to pasture. The impact of land conversion on N cycling surpassed the influence of the spatial (between-site) and seasonal variation. Overall, the results indicate a decline in available N and overall soil fertility due to Cerrado conversion, which could further increase N limitation in the Cerrado region, increase fertilization needs for future exploitation, and compromise the recovery of Cerrado in case of land abandonment or restoration. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页数:12
相关论文
共 50 条
  • [1] Labile soil organic carbon loss in response to land conversion in the Brazilian woodland savanna (cerradAo)
    de Brito, Gisele S.
    Bautista, Susana
    Lopez-Poma, Rosario
    Pivello, Vania R.
    BIOGEOCHEMISTRY, 2019, 144 (01) : 31 - 46
  • [2] Influence of land use (savanna, pasture, Eucalyptus plantations) on soil carbon and nitrogen stocks in Brazil
    Maquere, V.
    Laclau, J. P.
    Bernoux, M.
    Saint-Andre, L.
    Goncalves, J. L. M.
    Cerri, C. C.
    Piccolo, M. C.
    Ranger, J.
    EUROPEAN JOURNAL OF SOIL SCIENCE, 2008, 59 (05) : 863 - 877
  • [3] Soil water dynamics in a toposequence under savanna woodland (Cerradao) in Assis, SP, Brazil
    Pinto Juhasz, Carlos Eduardo
    Cursi, Patricia Ribeiro
    Cooper, Miguel
    Oliveira, Thalita Campos
    Rodrigues, Ricardo Ribeiro
    REVISTA BRASILEIRA DE CIENCIA DO SOLO, 2006, 30 (03): : 401 - 412
  • [4] Changes in soil properties related to conversion of savannah woodland into pine and eucalyptus plantations, northern Nigeria
    Jaiyeoba, I.A.
    Land Degradation and Development, 1998, 9 (03): : 207 - 215
  • [5] Changes in soil properties related to conversion of savannah woodland into pine and Eucalyptus plantations, northern Nigeria
    Jaiyeoba, IA
    LAND DEGRADATION & DEVELOPMENT, 1998, 9 (03) : 207 - 215
  • [6] Soil-atmosphere exchange of greenhouse gases in a Eucalyptus marginata woodland, a clover-grass pasture, and Pinus radiata and Eucalyptus globulus plantations
    Livesley, S. J.
    Kiese, R.
    Miehle, P.
    Weston, C. J.
    Butterbach-Bahl, K.
    Arndt, S. K.
    GLOBAL CHANGE BIOLOGY, 2009, 15 (02) : 425 - 440
  • [7] NITROGEN BALANCE IN SOIL UNDER EUCALYPTUS PLANTATIONS
    Bittencourt Barreto, Patricia Anjos
    da Gama-Rodrigues, Antonio Carlos
    da Gama-Rodrigues, Emanuela Forestieri
    de Barros, Nairam Felix
    REVISTA BRASILEIRA DE CIENCIA DO SOLO, 2012, 36 (04): : 1239 - 1248
  • [9] Labile soil organic carbon loss in response to land conversion in the Brazilian woodland savanna (cerradão)
    Gisele S. de Brito
    Susana Bautista
    Rosário López-Poma
    Vânia R. Pivello
    Biogeochemistry, 2019, 144 : 31 - 46
  • [10] Soil mesofauna drives litter decomposition under combined nitrogen and phosphorus additions in a Brazilian woodland savanna
    Pompermaier, Vinicius Tirelli
    Campani, Alex Rosa
    Dourado, Ellen
    Della Coletta, Luciana
    da Cunha Bustamante, Mercedes Maria
    Nardoto, Gabriela Bielefeld
    AUSTRAL ECOLOGY, 2022, 47 (01) : 26 - 34