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 538981
Title Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing
Author(s) Klootwijk, C.W.; Zom, R.L.G.; Pol, A. van den; Middelaar, C.E. van; Holshof, G.; Boer, I.J.M. de
Source In: Sustainable meat and milk production from grasslands. - Wageningen Academic Publishers (Grassland Science in Europe ) - ISBN 9781841706436 - p. 81 - 84.
Event 27th European Grassland Federation General Meeting Cork (EGF 2018), Cork, 2018-06-17/2018-07-21
Department(s) Animal Production Systems
Animal Nutrition
Publication type Contribution in proceedings
Publication year 2018
Abstract The Dutch dairy sector aims to improve nitrogen (N) use efficiency (NUEN) of intensive dairy farms while supporting grazing. To gain insight into the NUEN of intensive dairy farms, we need insight into the NUEN at cow level. We performed a 2 x 2 factorial grazing trial with 60 Holstein Friesian cows (7.5 cows ha-1), in which we compared NUEN of individual cows under two grazing systems, i.e. compartmented continious grazing (CCG) and strip grazing (SG) and two levels of dietary rumen-degradable protein balance (OEB), i.e. low and high (a difference of 500 g OEB cow-1 day-1). Grass and supplementary intakes and faecal and milk outputs were quantified and analysed for N content, during two weeks in July and September 2016. Results showed a higher NUEN for cows in CCG (39%) compared to cows in SG (36%) in July, due to lower grass (N) intake in CCG. Low OEB showed a higher NUEN (40%) compared to high OEB (34%). Our results are key to exploring strategies to improve NUEN of farms that apply innovative grazing systems.
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