A - Papers appearing in refereed journals
Guo, J. H., Liu, X. J., Zhang, Y., Shen, L. J., Han, W. X., Zhang, W-F., Christie, P., Goulding, K. W. T., Vitousek, P. M. and Zhang, F-S. 2010. Significant acidification in major Chinese croplands. Science. 327 (5968), pp. 1008-1010.
|Authors||Guo, J. H., Liu, X. J., Zhang, Y., Shen, L. J., Han, W. X., Zhang, W-F., Christie, P., Goulding, K. W. T., Vitousek, P. M. and Zhang, F-S.|
Soil acidification is a major problem in soils of intensive Chinese agricultural systems. We used two nationwide surveys, paired comparisons in numerous individual sites, and several long-term monitoring-field data sets to evaluate changes in soil acidity. Soil pH declined significantly (P < 0.001) from the 1980s to the 2000s in the major Chinese crop-production areas. Processes related to nitrogen cycling released 20 to 221 kilomoles of hydrogen ion (H(+)) per hectare per year, and base cations uptake contributed a further 15 to 20 kilomoles of H(+) per hectare per year to soil acidification in four widespread cropping systems. In comparison, acid deposition (0.4 to 2.0 kilomoles of H(+) per hectare per year) made a small contribution to the acidification of agricultural soils across China.
|Keywords||RRES175; 175_Soil science; 175_Agroecology|
|Year of Publication||2010|
|Journal citation||327 (5968), pp. 1008-1010|
|Digital Object Identifier (DOI)||doi:10.1126/science.1182570|
|Open access||Published as non-open access|
|Funder project or code||SEF|
|Online||19 Feb 2010|
|Publication process dates|
|Accepted||14 Jan 2010|
|Publisher||American Association for the Advancement of Science (AAAS) Washington DC|
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