Significant acidification in major Chinese croplands

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 - AAAS. 327 (5968), pp. 1008-1010.

AuthorsGuo, 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.
Abstract

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. 

KeywordsRRES175; 175_Soil science; 175_Agroecology
Year of Publication2010
JournalScience - AAAS
Journal citation327 (5968), pp. 1008-1010
Digital Object Identifier (DOI)doi:10.1126/science.1182570
Open accessPublished as non-open access
Funder project or codeSEF
Maintaining soil resilience and function for sustainable land management
Publication dates
Online19 Feb 2010
Publication process dates
Accepted14 Jan 2010
PublisherAmerican Association for the Advancement of Science (AAAS) Washington DC

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