H.‐R. Wettstein

ETH Zurich

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Michael Kreuzer

ETH Zurich

Emmanuel Frossard

ETH Zurich

Astrid Oberson

ETH Zurich

I.K. Hindrichsen

Chr. Hansen (Denmark)

A. Machmüller

University of Kassel

Ch. Bosshard

Swiss Center for Electronics and Microtechnology (Switzerland)

Else K. Bünemann

Forschungsinstitut für Biologischen Landbau

Gerald Jandl

University of Rostock

Michael Cormann

Forschungsinstitut für Biologischen Landbau

Peter Leinweber

University of Rostock

Cooperative Institutions

ETH Zurich

École Polytechnique Fédérale de Lausanne

Board of the Swiss Federal Institutes of Technology

Instituto de Ciencias Agrarias

Forschungsinstitut für Biologischen Landbau

Institute of Animal Science

Agroscope

University of Zurich

University of New England

University of Rostock

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Nutrient Cycling in Agroecosystems (2022)

Hanna Frick Astrid Oberson Michael Cormann H.‐R. Wettstein Emmanuel Frossard

Abstract Targeted use of animal manures as a nitrogen (N) fertilizer is challenging because of their poorly predictable N fertilizer value. An enhanced understanding of their N transformation processes in soil under field conditions is necessary to better synchronize N availability and crop N demand. 15 N labeled cattle slurry, produced by feeding a heifer with 15 N labeled ryegrass hay, was used in an on-farm trial on two neighboring fields, cropped with maize or grass-clover, in order to assess crop N uptake and N dynamics in the topsoil. Recovery of applied total N in plant biomass was higher for mineral fertilizer (Min) (45–48%) than for slurry (Slu) (17–22%) when applied at the same rate of mineral N. Also, N derived from fertilizer in plant biomass was higher for Min than for Slu, due to both greater NH 3 emissions and greater initial immobilization of slurry N. Despite initial differences between the two in the relative distribution of residual fertilizer N in soil N pools, already in the following spring the majority (77–89%) of residual N from both fertilizers was found in the non-microbial organic N pool. Of the applied total N, 18–26% remained in the topsoil after the first winter for Min, compared to 32–52% for Slu. Thus, the proportion of fertilizer N not taken up by the first crop after application, enters the soil organic N pool and must be re-mineralized to become plant available.

Topsoil

Organic fertilizer

10.1007/s10705-022-10205-5

Cite

Citations (11)

Effect of the Carbohydrate Composition of feed Concentratates on Methane Emission from dairy Cows and Their Slurry

Environmental Monitoring and Assessment (2005)

I.K. Hindrichsen H.‐R. Wettstein A. Machmüller B. Jörg Michael Kreuzer

Neutral Detergent Fiber

Silage

Hemicellulose

10.1007/s10661-005-3008-3