景恒 郭;学军 刘;颖 张;健林 沈;文轩 韩;卫峰 张;P. Christie;K. W.T. Goulding;P. M. Vitousek;福锁 张
China Agricultural University;Agri-Food and Biosciences Institute;Rothamsted Research;Stanford University
发表时间:2010-2-19
期 刊:Science
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=77249102566&partnerID=8YFLogxK
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.
Scopus度量
年份 | CiteScore | SJR | SNIP |
---|---|---|---|
1996 | |||
1997 | |||
1998 | |||
1999 | 16.615 | 6.948 | |
2000 | 13.319 | 7.003 | |
2001 | 10.987 | 6.898 | |
2002 | 10.814 | 7.242 | |
2003 | 11.428 | 7.439 | |
2004 | 11.589 | 7.237 | |
2005 | 11.09 | 6.525 | |
2006 | 10.542 | 6.097 | |
2007 | 10.072 | 5.991 | |
2008 | 11.277 | 6.041 | |
2009 | 11.897 | 7.025 | |
2010 | 13.481 | 7.745 | |
2011 | 44.7 | 14.238 | 8.191 |
2012 | 46.3 | 13.318 | 7.992 |
2013 | 46.9 | 12.41 | 7.719 |
2014 | 46 | 12.052 | 8.045 |
2015 | 46.6 | 12.872 | 7.549 |
2016 | 49.5 | 13.745 | 7.652 |
2017 | 49.4 | 14.142 | 7.366 |
2018 | 47.1 | 13.251 | 7.529 |
2019 | 45.3 | 13.11 | 7.521 |
2020 | 45.5 | ||
2021 |
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