Erin Wepruk, A. Diochon, L. V. Van Eerd, E. Gregorich, B. Deen, D. Hooker
{"title":"确定维持或增加土壤碳的轮作和耕作方法及其与土壤健康的关系","authors":"Erin Wepruk, A. Diochon, L. V. Van Eerd, E. Gregorich, B. Deen, D. Hooker","doi":"10.1139/cjss-2021-0161","DOIUrl":null,"url":null,"abstract":"Abstract Physical fractions of soil organic matter (SOM) are established indicators of management-induced change and have been used to estimate the soil carbon storage capacity and storage potential. Here, we use SOM physical fractions and soil textures to identify management practices that maintain or enhance soil health and carbon storage in agricultural soils in Ontario. Metadata from the National Soil Database were used to estimate carbon storage potentials and calculate carbon deficits. A map was created showing carbon deficits in Ontario's agricultural soils and indicates that these soils have the potential to store an additional 0 to 2kgm−2 in the top 20cm of the soil. Tillage system generally had no effect on the size of the carbon deficit at four long-term agricultural experiments (Delhi, Elora, Ottawa, and Ridgetown). There was only a significant tillage effect at Ridgetown and only in the maize–soybean crop rotation, where the carbon deficit was 2.95gCkgsoil−1 under conventional tillage compared to 8.97gCkgsoil−1 with no tillage. A statistically significant effect of crop rotation was detected in Elora and Ridgetown. In Elora, continuous alfalfa had the smallest carbon deficit (7.25gCkgsoil−1) and maize–soybean rotation had the largest deficit (12.07gCkgsoil−1). In Ridgetown, the maize–soybean rotation had the smallest carbon deficit (2.95gCkgsoil−1). Regression analysis showed a weak negative relationship (R2=0.11; P<0.001) between carbon storage deficits and soil health scores. This suggests that increasing SOM levels alone may not improve soil health.","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Identifying rotation and tillage practices that maintain or enhance soil carbon and its relation to soil health\",\"authors\":\"Erin Wepruk, A. Diochon, L. V. Van Eerd, E. Gregorich, B. Deen, D. Hooker\",\"doi\":\"10.1139/cjss-2021-0161\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Physical fractions of soil organic matter (SOM) are established indicators of management-induced change and have been used to estimate the soil carbon storage capacity and storage potential. Here, we use SOM physical fractions and soil textures to identify management practices that maintain or enhance soil health and carbon storage in agricultural soils in Ontario. Metadata from the National Soil Database were used to estimate carbon storage potentials and calculate carbon deficits. A map was created showing carbon deficits in Ontario's agricultural soils and indicates that these soils have the potential to store an additional 0 to 2kgm−2 in the top 20cm of the soil. Tillage system generally had no effect on the size of the carbon deficit at four long-term agricultural experiments (Delhi, Elora, Ottawa, and Ridgetown). There was only a significant tillage effect at Ridgetown and only in the maize–soybean crop rotation, where the carbon deficit was 2.95gCkgsoil−1 under conventional tillage compared to 8.97gCkgsoil−1 with no tillage. A statistically significant effect of crop rotation was detected in Elora and Ridgetown. In Elora, continuous alfalfa had the smallest carbon deficit (7.25gCkgsoil−1) and maize–soybean rotation had the largest deficit (12.07gCkgsoil−1). In Ridgetown, the maize–soybean rotation had the smallest carbon deficit (2.95gCkgsoil−1). Regression analysis showed a weak negative relationship (R2=0.11; P<0.001) between carbon storage deficits and soil health scores. 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Identifying rotation and tillage practices that maintain or enhance soil carbon and its relation to soil health
Abstract Physical fractions of soil organic matter (SOM) are established indicators of management-induced change and have been used to estimate the soil carbon storage capacity and storage potential. Here, we use SOM physical fractions and soil textures to identify management practices that maintain or enhance soil health and carbon storage in agricultural soils in Ontario. Metadata from the National Soil Database were used to estimate carbon storage potentials and calculate carbon deficits. A map was created showing carbon deficits in Ontario's agricultural soils and indicates that these soils have the potential to store an additional 0 to 2kgm−2 in the top 20cm of the soil. Tillage system generally had no effect on the size of the carbon deficit at four long-term agricultural experiments (Delhi, Elora, Ottawa, and Ridgetown). There was only a significant tillage effect at Ridgetown and only in the maize–soybean crop rotation, where the carbon deficit was 2.95gCkgsoil−1 under conventional tillage compared to 8.97gCkgsoil−1 with no tillage. A statistically significant effect of crop rotation was detected in Elora and Ridgetown. In Elora, continuous alfalfa had the smallest carbon deficit (7.25gCkgsoil−1) and maize–soybean rotation had the largest deficit (12.07gCkgsoil−1). In Ridgetown, the maize–soybean rotation had the smallest carbon deficit (2.95gCkgsoil−1). Regression analysis showed a weak negative relationship (R2=0.11; P<0.001) between carbon storage deficits and soil health scores. This suggests that increasing SOM levels alone may not improve soil health.
期刊介绍:
The Canadian Journal of Soil Science is an international peer-reviewed journal published in cooperation with the Canadian Society of Soil Science. The journal publishes original research on the use, management, structure and development of soils and draws from the disciplines of soil science, agrometeorology, ecology, agricultural engineering, environmental science, hydrology, forestry, geology, geography and climatology. Research is published in a number of topic sections including: agrometeorology; ecology, biological processes and plant interactions; composition and chemical processes; physical processes and interfaces; genesis, landscape processes and relationships; contamination and environmental stewardship; and management for agricultural, forestry and urban uses.