Nitrogen and Phosphorus farm-gate balances of grassland-based dairy production systems on mixed farms in Switzerland

Zeller, Katharina; Menzi, H.; Hofstetter, P.; Reidy, Beat (2018). Nitrogen and Phosphorus farm-gate balances of grassland-based dairy production systems on mixed farms in Switzerland In: Sustainable meat and milk production from grasslands : proceedings of the 27th General Meeting of the European Grassland Federation. Grassland Science in Europe: Vol. 23 (pp. 550-552). Wageningen, The Netherlands: Wageningen Academic Publishers

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Farm gate balances for nitrogen (N) and phosphorus (P) were calculated for mixed crop-livestock farms in Switzerland for three types of dairy production systems: Partial grazing with indoor feeding of fresh grass with reduced (IF) and increased (IFplus) concentrate supplementation was compared with full-time grazing (FG). The aim was to identify the effects of the different systems on the N/P surplus per hectare and the N/P use efficiency (N/PUE). The mean values of the N surplus were 90.1 kg N ha-1 (FG), 91.8 kg N ha-1 (IF) and 133.6 kg N ha-1 (IFplus). The NUE was highest in IF (53.2%) and comparable for IFplus and FG (46.1 and 44.6%). Phosphorus surpluses were 2.5, 9.6 and 10.8 kg P ha-1 for FG, IF and IFplus, respectively. Some farms showed negative P balances. The PUE was 100.6, 76.5 and 70.0% for FG, IF and IFplus, respectively. Significant relationships were found between the N/P surplus and inputs of fertiliser, manure, concentrate and legume N fixation. NUE on IF and IFplus farms was significantly correlated with the percentage of arable land of the total farm land. An appropriate need-based feeding strateg y and a low-loss use of fertiliser and manure might improve the N/P balances.

Item Type:	Conference or Workshop Item (Paper)
Division/Institute:	School of Agricultural, Forest and Food Sciences HAFL > Resource-efficient agricultural production systems School of Agricultural, Forest and Food Sciences HAFL > Agriculture
Name:	Zeller, Katharina; Menzi, H.; Hofstetter, P. and Reidy, Beat0000-0002-8619-0209
Subjects:	S Agriculture > S Agriculture (General)
ISBN:	978-1-84170-643-6
Series:	Grassland Science in Europe
Publisher:	Wageningen Academic Publishers
Language:	English
Submitter:	Service Account
Date Deposited:	18 Feb 2020 08:35
Last Modified:	18 Dec 2020 13:28
ARBOR DOI:	10.24451/arbor.7343
URI:	https://arbor.bfh.ch/id/eprint/7343