Calibration of the soil conditioning index (SCI) to soil organic carbon in the southeastern USA

被引：6

作者：

Franzluebbers, Alan J. ^{[1
]}

Causarano, Hector J. ^{[2
]}

Norfleet, M. Lee ^{[3
]}

机构：

[1] ARS, USDA, 1420 Expt Stn Rd, Watkinsville, GA 30677 USA

[2] Natl Univ Asuncion, San Lorenzo, Paraguay

[3] Nat Resources Conservat Serv, USDA, Temple, TX 76502 USA

来源：

PLANT AND SOIL | 2011年 / 338卷 / 1-2期

关键词：

Conservation tillage; Crop rotation; Modeling; No tillage; Organic matter; GREENHOUSE-GAS CONTRIBUTIONS; LONG-TERM CONSERVATION; NORFOLK LOAMY SAND; CROPPING SYSTEMS; MANAGEMENT-PRACTICES; NITROGEN STORAGE; MATTER FRACTIONS; COVER CROPS; TILLAGE; SEQUESTRATION;

D O I：

10.1007/s11104-010-0310-9

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Prediction of soil organic C sequestration with adoption of various conservation agricultural management approaches is needed to meet the emerging market for environmental services provided by agricultural land stewardship. The soil conditioning index (SCI) is a relatively simple model used by the USDA-Natural Resources Conservation Service to predict qualitative changes in soil organic matter. Our objective was to develop a quantitative relationship between soil organic C derived from published field studies in the southeastern USA and SCI scores predicted from matching management conditions. We found that soil organic C sequestration (at 20 +/- 5 cm depth) could be reliably related to SCI across a diversity of studies in the region using the regression slope: 1.65 Mg C ha(-1) SCI-1 [which translated into a rate of 0.25 +/- 0.04 Mg C ha(-1) yr(-1) SCI-1 (mean +/- standard error of 31 slope estimates)]. The calibration of soil organic C on SCI scores will allow SCI to become a quantitative tool for natural resource professionals to predict soil organic C sequestration for farmers wanting to adopt conservation practices.

引用

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页码：223 / 232

页数：10

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