Significant Acidification in Major Chinese Croplands | Zendy

Jingheng Guo | Zendy; Xu Liu | Zendy; Ying Zhang | Zendy; Jianning Shen | Zendy; Wenxuan Han | Zendy; Wei Zhang | Zendy; Peter Christie | Zendy; K. W. T. Goulding | Zendy; Peter M. Vitousek | Zendy; F.S. Zhang | Zendy

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Significant Acidification in Major Chinese Croplands

Author(s) -

Jingheng Guo,

Xu Liu,

Ying Zhang,

Jianning Shen,

Wenxuan Han,

Wei Zhang,

Peter Christie,

K. W. T. Goulding,

Peter M. Vitousek,

F.S. Zhang

Publication year - 2010

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1182570

Subject(s) - hectare , soil acidification , soil water , environmental science , soil ph , cropping , agriculture , nitrogen , cycling , agronomy , acid rain , environmental chemistry , chemistry , soil science , geography , ecology , biology , forestry , organic chemistry

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.

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