Soil organic carbon content: decreases partly attributed to dilution by increased depth of cultivation in southern Ontario

Warren C. J.; Saurette D. D.; Gillespie A. W.

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Soil organic carbon content: decreases partly attributed to dilution by increased depth of cultivation in southern Ontario

机译：土壤有机碳含量：减少部分归因于安大略南部南部的栽培深度增加稀释

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Soil organic carbon contents and depths of Ap horizons (i.e., cultivated topsoil) from Ontario soil survey reports were reviewed, analyzed, and compared from 1950 to 2019. Organic carbon concentrations have declined from 2.85% to 2.34% in Ap horizons, whereas depths have increased by 40%. Considering the entire Ap horizon depth, we show that soil carbon stocks (kg C.ha(-1)) may be constant or increasing. Losses of organic carbon due to cultivation should not be discounted; however, dilution of organic carbon within a deeper plow layer may contribute significantly to observed decreases in organic carbon concentrations in topsoil.

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来源
《Canadian Journal of Soil Science》 |2021年第2期|共4页
作者
Warren C. J.; Saurette D. D.; Gillespie A. W.;
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作者单位

Ontario Minist Agr Food &

Rural Affairs 1 Stone Rd West 3rd Floor SE Guelph ON N1G 4Y2 Canada;

Ontario Minist Agr Food &

Rural Affairs 1 Stone Rd West 3rd Floor SE Guelph ON N1G 4Y2 Canada;

Univ Guelph Sch Environm Sci 50 Stone Rd East Guelph ON N1G 2W1 Canada;

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原文格式 PDF
正文语种 eng
中图分类土壤学;
关键词
soil organic carbon; topsoil depth; carbon stock; carbon concentration; cultivation; plow layer;

机译：土壤有机碳;表土深度;碳股;碳浓度;栽培;耕作层;

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Soil organic carbon content: decreases partly attributed to dilution by increased depth of cultivation in southern Ontario

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