|
|
| Bosshard, Christine; Sorensen, Peter; Frossard, Emmanuel; Mayer, Jochen; Mäder, Paul; Nanzer, Simone; Oberson, Astrid. |
| Nitrogen (N) utilisation by crops has to be improved to minimize losses to the environment. We investigated N use efficiency of animal manure and mineral fertiliser and fate of fertiliser N not taken up by crops in a bio-organic (BIOORG) and a conventional (CONMIN) cropping system of a long-term experiment over three vegetation periods (wheat-soybean-maize). Microplots received a single application of 15N-labelled slurries or mineral fertiliser. At the end of each vegetation period we tested whether higher microbial activity and biomass in BIOORG than CONMIN soils and lower long-term N input level in BIOORG affected use efficiency and fate of fertiliser N not taken up by crops. In total 41%, 15% and 50% of 15N applied as urine, faeces and mineral... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2009 |
URL: http://orgprints.org/14392/1/Bosshard_14392.pdf |
| |
