Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 497056
Title Variation in nitrogen use efficiencies on Dutch dairy farms
Author(s) Daatselaar, Co Hg; Reijs, Joan R.; Oenema, Jouke; Doornewaard, Gerben J.; Aarts, Frans
Source Journal of the Science of Food and Agriculture 95 (2015)15. - ISSN 0022-5142 - p. 3055 - 3058.
DOI http://dx.doi.org/10.1002/jsfa.7250
Department(s) LEI Performance and Impact Agrosectors
PPO/PRI AGRO Field Technology Innovations
LEI Innovation, Risk and Information Management
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Dairy farms - Efficiency - Nitrogen use efficiency - Variation
Abstract

BACKGROUND: On dairy farms, the input of nutrients including nitrogen is higher than the output in products such as milk and meat. This causes losses of nitrogen to the environment. One of the indicators for the losses of nitrogen is the nitrogen use efficiency. In the Dutch Minerals Policy Monitoring Program (LMM), many data on nutrients of a few hundred farms are collected which can be processed by the instrument Annual Nutrient Cycle Assessment (ANCA, in Dutch: Kringloopwijzer) in order to provide nitrogen use efficiencies. RESULTS: After dividing the dairy farms (available in the LMM program) according to soil type and in different classes for milk production ha-1, it is shown that considerable differences in nitrogen use efficiency exist between farms on the same soil type and with the same level of milk production ha-1. CONCLUSION: This offers opportunities for improvement of the nitrogen use efficiency on many dairy farms. Benchmarking will be a useful first step in this process.

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