Helgason, B.

Katulanda, P.

Walley, F.

English

eCommons@USASK

Soil origin and land use history determine C cycling in transplanted soils after 21 years

University of Saskatchewan Research Archive

Soils and Crops- March 2017Panchali KatulandaDr. Fran Walley and Dr. Bobbi HelgasonSoil origin and land use history determine C cycling in transplanted soils after 21 yearsSoil microbial communities - Functions- CompositionAgriculture management practicesClimate TopographyNutrient cyclingEg. C and NIntroductionSoil Transplantation http://www.daviddarling.info/encyclopedia/S/AE_soil.htmlfield at AAFC, Lethbridge, AB.36 diverse ChernozemsPasturelandCereal cultivatedManuredElimination of confounding effectsClimateTopographyHydrologyCommon conditionsLong-term Transplanted SoilsEffect of Residue Removal on Soil Total Organic C After 21 Years❖To characterize microbial use of 13C cellulose indifferent transplanted soils❖To observe the influence of long term N fertilizerapplication on 13C labeled cellulose decomposition indifferent soils.ObjectivesIncubation conditionslimited C and N supply (0 kg N ha-1) 0.22 g 13C cellulose kg-1 soil0 g 13CCellulose kg-1 soillimited C supply(60 kg N ha-1) 0.22 g 13C cellulose kg-1 soil0 g 13CCellulose kg-1 soilCurrent conditionsSoil origin/Land use historyN- N+N- N+CC-cereal cultivatedPL- native pasturelandDTF-dryland tilled fallowedRM- manure appliedStable Isotope Probing13C celluloseSoil + 13C celluloseLight fraction 12C DNAHeavy fraction 13C DNAExtraction of DNAGradientfractionationIllumina sequencingT2112CO213CO2Determination of 13C decompositionCumulative C-CO2 emissionSoil origin13Cellulose unamended 13Cellulose amendedN history N effect N history N effectN- N+ N- N+CC 775 898 16 % 966 1014 5 %PL 863 1102 28 % 984 1205 23 %DTF 750 902 20 % 762 999 31 %RM 979 1106 13 % 970 1129 16 %Effect of N fertilization history on cumulative respiration Decomposer microbial community structure❖ Soil origin and land use history have a long lasting impact on soilmicrobial community composition and C cycling.❖ The effects of current agriculture land use management practices on soildecomposer communities and their functions remained affected by soilorigin and past land use history.ConclusionLand use history will affect soil biological functioning in future agricultural systems • University of Saskatchewan• Funding- Agriculture Agri-Food Canada • Soil Biochemistry Group at AAFC Lethbridge• Stable Isotope Lab, Dept. of Soil Science, U of SAcknowledgement

https://harvest.usask.ca/bitstream/10388/8753/1/P.%20Katulanda%20et%20al.%2c%202017.pdf

Soil origin and land use history determine C cycling in transplanted soils after 21 years

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