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A global meta‐analysis of soil phosphorus dynamics after afforestation
Author(s) -
Deng Qi,
McMahon Devin E.,
Xiang Yangzhou,
Yu ChihLi,
Jackson Robert B.,
Hui Dafeng
Publication year - 2017
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.14119
Subject(s) - afforestation , environmental science , phosphorus , nutrient , agronomy , tropics , agroforestry , ecology , biology , chemistry , organic chemistry
Summary Afforestation significantly affects soil chemistry and biota, but its effects on the potentially growth‐limiting nutrient phosphorus (P) had not to our knowledge been analyzed globally. We conducted a comprehensive meta‐analysis of 220 independent sampling sites from 108 articles to evaluate global patterns and controls of soil P change following afforestation. Overall, total P concentration decreased by 11% and total P stock by 12% in the top 20 cm of mineral soil following afforestation, with no change in available P. Time since afforestation had no consistent effect on total P, while available P tended to increase with time. Prior land cover was the most influential factor for soil P change after afforestation, with available P increasing on native vegetation but decreasing on cropland. Afforestation increased available P by 22% without decreasing total P on formerly ‘degraded’ land, but depleted total P by 15% at nondegraded sites. Climate also influenced soil P response to afforestation, with larger P loss in the tropics. Afforestation did not appear to directly induce P limitation, as available P only decreased on cropland. However, substantial declines in total P may drive tropical plantations toward greater P limitation as the capacity to replenish available P decreases.