{"title":"Crop yields under no-till in Canada: Implications for soil organic carbon change
","authors":"Bert VandenBygaart, B. Chang Liang","doi":"10.1139/cjss-2023-0061","DOIUrl":null,"url":null,"abstract":"Crop yields directly affect carbon inputs into soils. Tillage management can influence crop performance, and should be considered when quantifying soil organic carbon change (SOC), and thus net greenhouse gas emissions from croplands for national inventory reporting. We conducted a meta-analysis of the effects of no-tillage (NT) and conventional tillage (CT) on crop yields for multiple crop species, soil types and climatic regions of Canada. Yield response to NT varied between Western and Eastern Canada. Regardless of crop type, experiment duration, soil texture and residue management, experiments in Eastern Canada showed an average of 6% lower yields (p ≤ 0.005) under NT compared to CT. In Western Canada, crop type had an important effect on yields between NT and CT with wheat, canola and legumes exhibiting 10% (p ≤ 0.001), 7% (p ≤ 0.05) and 9% (p ≤ 0.05) higher yields on average under NT compared to CT, respectively. In Western Canada higher yields would be reflected in a similar scale of higher carbon inputs to NT systems. A recent meta-analysis of the effects of tillage management on SOC in Canada showed an 8% higher storage of SOC under NT systems, compared to CT, a difference limited to Western Canadian soils. Incorporating the effect of tillage on carbon inputs will lead to improvements in the accuracy of the effects of tillage management on SOC change in Canadian cropland. The activity data can be improved by applying weightings to the yield data by site specific assessment of tillage practices across Canada","PeriodicalId":9384,"journal":{"name":"Canadian Journal of Soil Science","volume":"6 12","pages":"0"},"PeriodicalIF":1.5000,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Journal of Soil Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1139/cjss-2023-0061","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Crop yields directly affect carbon inputs into soils. Tillage management can influence crop performance, and should be considered when quantifying soil organic carbon change (SOC), and thus net greenhouse gas emissions from croplands for national inventory reporting. We conducted a meta-analysis of the effects of no-tillage (NT) and conventional tillage (CT) on crop yields for multiple crop species, soil types and climatic regions of Canada. Yield response to NT varied between Western and Eastern Canada. Regardless of crop type, experiment duration, soil texture and residue management, experiments in Eastern Canada showed an average of 6% lower yields (p ≤ 0.005) under NT compared to CT. In Western Canada, crop type had an important effect on yields between NT and CT with wheat, canola and legumes exhibiting 10% (p ≤ 0.001), 7% (p ≤ 0.05) and 9% (p ≤ 0.05) higher yields on average under NT compared to CT, respectively. In Western Canada higher yields would be reflected in a similar scale of higher carbon inputs to NT systems. A recent meta-analysis of the effects of tillage management on SOC in Canada showed an 8% higher storage of SOC under NT systems, compared to CT, a difference limited to Western Canadian soils. Incorporating the effect of tillage on carbon inputs will lead to improvements in the accuracy of the effects of tillage management on SOC change in Canadian cropland. The activity data can be improved by applying weightings to the yield data by site specific assessment of tillage practices across Canada
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.