Swedish long-term agricultural field experiments – soil carbon stock changes are affected by management

Kätterer, ThomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology (author)

Long-term field experiments (LTEs) are a useful resource for quantifying changes in soil organic carbon (SOC) stocks due to agricultural management. We present results from recent work focusing on the effect of different management practices on SOC stocks in Swedish LTEs. Application of inorganic N fertilizer increased SOC, on average, by about 1 kg C for each kg of N added. Straw incorporation affected SOC only in soils with high clay content. On average, 0.5 Mg ha-1 yr-1 more SOC was retained in soils in ley-dominated compared to exclusively annual rotations. Incorporation of ryegrass undersown in spring cereals increased SOC, on average, by 0.3 Mg ha-1 yr-1. Sewage sludge addition to soil increased SOC directly through C input and indirectly through stimulation of primary production. Between 16 and 32% of C added with sludge was retained in the topsoil after 13 to 53 years.

Bolinder, MartinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology(Swepub:slu)50140 (author)
Poeplau, ChristopherSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology(Swepub:slu)100376 (author)
Börjesson, GunnarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)49477 (author)
Kirchmann, HolgerSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)49793 (author)
Bergkvist, GöranSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology(Swepub:slu)50573 (author)
Sveriges lantbruksuniversitetInstitutionen för ekologi (creator_code:org_t)
Sveriges lantbruksuniversitet

By the author/editor: Kätterer, Thomas; Bolinder, Martin; Poeplau, Christo ...; Börjesson, Gunna ...; Kirchmann, Holge ...; Bergkvist, Göran

About the subject

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Soil Science

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