Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing

C.W. Klootwijk; R.L.G. Zom; A. van den Pol; C.E. van Middelaar; G. Holshof; I.J.M. de Boer

Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing

C.W. Klootwijk, R.L.G. Zom, A. van den Pol, C.E. van Middelaar, G. Holshof, I.J.M. de Boer

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Academic

Abstract

The Dutch dairy sector aims to improve nitrogen (N) use efficiency (NUE_N) of intensive dairy farms while supporting grazing. To gain insight into the NUE_N of intensive dairy farms, we need insight into the NUE_N 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 NUE_N 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^-1day^-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 NUE_N 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 NUE_N (40%) compared to high OEB (34%). Our results are key to exploring strategies to improve NUE_N of farms that apply innovative grazing systems.

Original language	English
Title of host publication	Sustainable meat and milk production from grasslands
Editors	B. Horan, D. Hennessy, M. O'Donovan, E. Kennedy, B. McCarthy, J.A. Finn, B. O'Brien
Publisher	Wageningen Academic Publishers
Pages	81-84
Volume	23
ISBN (Electronic)	9781841706443
ISBN (Print)	9781841706436
Publication status	Published - 17 Jun 2018
Event	27th European Grassland Federation General Meeting Cork (EGF 2018): Sustainable meat and milk production from grasslands - Cork, Ireland Duration: 17 Jun 2018 → 21 Jul 2018 https://www.egf2018.com/

Publication series

Name	Grassland Science in Europe
Volume	23

Conference

Conference	27th European Grassland Federation General Meeting Cork (EGF 2018)
Country/Territory	Ireland
City	Cork
Period	17/06/18 → 21/07/18
Internet address	https://www.egf2018.com/

Access to Document

https://www.europeangrassland.org/fileadmin/documents/Infos/Printed_Matter/Proceedings/EGF2018.pdf#page=116Licence: Publisher

Competitiveness off future milk produced from grazing: a socio-economic and ecological perspective
Klootwijk, C. (PhD candidate), de Boer, I. (Promotor) & van Middelaar, C. (Co-promotor)
1/09/14 → 7/06/19
Project: PhD

Cite this

Klootwijk, C. W., Zom, R. L. G., van den Pol, A., van Middelaar, C. E., Holshof, G., & de Boer, I. J. M. (2018). Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing. In B. Horan, D. Hennessy, M. O'Donovan, E. Kennedy, B. McCarthy, J. A. Finn, & B. O'Brien (Eds.), Sustainable meat and milk production from grasslands (Vol. 23, pp. 81-84). (Grassland Science in Europe; Vol. 23). Wageningen Academic Publishers. https://www.europeangrassland.org/fileadmin/documents/Infos/Printed_Matter/Proceedings/EGF2018.pdf#page=116

Klootwijk, C.W. ; Zom, R.L.G. ; van den Pol, A. et al. / Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing. Sustainable meat and milk production from grasslands. editor / B. Horan ; D. Hennessy ; M. O'Donovan ; E. Kennedy ; B. McCarthy ; J.A. Finn ; B. O'Brien. Vol. 23 Wageningen Academic Publishers, 2018. pp. 81-84 (Grassland Science in Europe).

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title = "Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing",

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.",

author = "C.W. Klootwijk and R.L.G. Zom and {van den Pol}, A. and {van Middelaar}, C.E. and G. Holshof and {de Boer}, I.J.M.",

year = "2018",

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language = "English",

isbn = "9781841706436",

volume = "23",

series = "Grassland Science in Europe",

publisher = "Wageningen Academic Publishers",

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booktitle = "Sustainable meat and milk production from grasslands",

address = "Netherlands",

note = "27th European Grassland Federation General Meeting Cork (EGF 2018) : Sustainable meat and milk production from grasslands ; Conference date: 17-06-2018 Through 21-07-2018",

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Klootwijk, CW , Zom, RLG, van den Pol, A, van Middelaar, CE , Holshof, G & de Boer, IJM 2018, Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing. in B Horan, D Hennessy, M O'Donovan, E Kennedy, B McCarthy, JA Finn & B O'Brien (eds), Sustainable meat and milk production from grasslands. vol. 23, Grassland Science in Europe, vol. 23, Wageningen Academic Publishers, pp. 81-84, 27th European Grassland Federation General Meeting Cork (EGF 2018), Cork, Ireland, 17/06/18. <https://www.europeangrassland.org/fileadmin/documents/Infos/Printed_Matter/Proceedings/EGF2018.pdf#page=116>

Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing. / Klootwijk, C.W.; Zom, R.L.G.; van den Pol, A. et al.
Sustainable meat and milk production from grasslands. ed. / B. Horan; D. Hennessy; M. O'Donovan; E. Kennedy; B. McCarthy; J.A. Finn; B. O'Brien. Vol. 23 Wageningen Academic Publishers, 2018. p. 81-84 (Grassland Science in Europe; Vol. 23).

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Academic

TY - GEN

T1 - Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing

AU - Klootwijk, C.W.

AU - Zom, R.L.G.

AU - van den Pol, A.

AU - van Middelaar, C.E.

AU - Holshof, G.

AU - de Boer, I.J.M.

PY - 2018/6/17

Y1 - 2018/6/17

N2 - 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.

AB - 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.

M3 - Conference paper

SN - 9781841706436

VL - 23

T3 - Grassland Science in Europe

SP - 81

EP - 84

BT - Sustainable meat and milk production from grasslands

A2 - Horan, B.

A2 - Hennessy, D.

A2 - O'Donovan, M.

A2 - Kennedy, E.

A2 - McCarthy, B.

A2 - Finn, J.A.

A2 - O'Brien, B.

PB - Wageningen Academic Publishers

T2 - 27th European Grassland Federation General Meeting Cork (EGF 2018)

Y2 - 17 June 2018 through 21 July 2018

ER -

Klootwijk CW , Zom RLG, van den Pol A, van Middelaar CE , Holshof G , de Boer IJM. Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing. In Horan B, Hennessy D, O'Donovan M, Kennedy E, McCarthy B, Finn JA, O'Brien B, editors, Sustainable meat and milk production from grasslands. Vol. 23. Wageningen Academic Publishers. 2018. p. 81-84. (Grassland Science in Europe).

Amazing Grazing: N use efficiency of 60 individual dairy cows under intensive grazing

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Competitiveness off future milk produced from grazing: a socio-economic and ecological perspective

Cite this