Effect of grass silage chop length on chewing activity and digestibility

T.H. Garmo; Å.T. Randby; M. Eknæs; E. Prestløkken; Peder Nørgaard

Effect of grass silage chop length on chewing activity and digestibility

T.H. Garmo, Å.T. Randby, M. Eknæs, E. Prestløkken, Peder Nørgaard

Abstract

Round bale grass silage harvested early (D-value 757 g kg^-1 DM) or at a normal (D-value 696 g kg^-1 DM) time was used to study the effect of harvesting time, chop length and their interaction on chewing activity and digestibility by dairy cows. Six early lactating Norwegian Red cows were used in a 6 x 6 Latin square with 3-week periods. Chewing activity was measured using IGER Behaviour recorders, and digestibility was measured by total collection of faeces. The two silages were fed long (170 mm), coarsely chopped (55 mm), or finely chopped (24 mm median particle length). Cows were fed silage ad libitum and supplemented with 6 kg concentrate. Early harvested silage significantly decreased total ration eating (ET), rumination (RT) and chewing time (CT) per kg silage DM compared with normal harvested silage (CT = 38 vs. 46 min kg^-1 DM). Chopping of silage reduced CT significantly, mainly due to reduced ET, CT = 45, 41 and 39 min kg^-1 DM for rations with long, coarsely and finely chopped silage, respectively. Grass silage chop length did not influence diet digestibility, but there was a significant effect of harvesting time on digestibility. No interaction between harvesting time and chop length was found, neither for chewing activity nor digestibility.

Originalsprog	Engelsk
Titel	Biodiversity and animal feed : future challenges for grassland production
Redaktører	A. Hopkins, T. Gustafsson, J. Bertilsson, G. Dalin, N. Nilsdotter-Linde, E. Spörndly
Antal sider	3
Forlag	Sveriges Lantbruksuniversitet (SLU)
Publikationsdato	2008
Sider	810-812
Status	Udgivet - 2008
Begivenhed	EGF General Meeting - Uppsala, Sverige Varighed: 9 jun. 2008 → 11 jun. 2008 Konferencens nummer: 22

Konference

Konference	EGF General Meeting
Nummer	22
Land/Område	Sverige
By	Uppsala
Periode	09/06/2008 → 11/06/2008

Navn	Grassland Science in Europe
Vol/bind	13

Citationsformater

Garmo, T. H., Randby, Å. T., Eknæs, M., Prestløkken, E., & Nørgaard, P. (2008). Effect of grass silage chop length on chewing activity and digestibility. I A. Hopkins, T. Gustafsson, J. Bertilsson, G. Dalin, N. Nilsdotter-Linde, & E. Spörndly (red.), Biodiversity and animal feed: future challenges for grassland production (s. 810-812). Sveriges Lantbruksuniversitet (SLU). Grassland Science in Europe Bind 13

Effect of grass silage chop length on chewing activity and digestibility. / Garmo, T.H.; Randby, Å.T.; Eknæs, M. et al.

Biodiversity and animal feed: future challenges for grassland production. red. / A. Hopkins; T. Gustafsson; J. Bertilsson; G. Dalin; N. Nilsdotter-Linde; E. Spörndly. Sveriges Lantbruksuniversitet (SLU), 2008. s. 810-812 (Grassland Science in Europe, Bind 13).

Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning

Garmo, TH, Randby, ÅT, Eknæs, M, Prestløkken, E & Nørgaard, P 2008, Effect of grass silage chop length on chewing activity and digestibility. i A Hopkins, T Gustafsson, J Bertilsson, G Dalin, N Nilsdotter-Linde & E Spörndly (red), Biodiversity and animal feed: future challenges for grassland production. Sveriges Lantbruksuniversitet (SLU), Grassland Science in Europe, bind 13, s. 810-812, EGF General Meeting, Uppsala, Sverige, 09/06/2008.

Garmo TH, Randby ÅT, Eknæs M, Prestløkken E, Nørgaard P. Effect of grass silage chop length on chewing activity and digestibility. I Hopkins A, Gustafsson T, Bertilsson J, Dalin G, Nilsdotter-Linde N, Spörndly E, red., Biodiversity and animal feed: future challenges for grassland production. Sveriges Lantbruksuniversitet (SLU). 2008. s. 810-812. (Grassland Science in Europe, Bind 13).

Garmo, T.H. ; Randby, Å.T. ; Eknæs, M. et al. / Effect of grass silage chop length on chewing activity and digestibility. Biodiversity and animal feed: future challenges for grassland production. red. / A. Hopkins ; T. Gustafsson ; J. Bertilsson ; G. Dalin ; N. Nilsdotter-Linde ; E. Spörndly. Sveriges Lantbruksuniversitet (SLU), 2008. s. 810-812 (Grassland Science in Europe, Bind 13).

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abstract = "Round bale grass silage harvested early (D-value 757 g kg-1 DM) or at a normal (D-value 696 g kg-1 DM) time was used to study the effect of harvesting time, chop length and their interaction on chewing activity and digestibility by dairy cows. Six early lactating Norwegian Red cows were used in a 6 x 6 Latin square with 3-week periods. Chewing activity was measured using IGER Behaviour recorders, and digestibility was measured by total collection of faeces. The two silages were fed long (170 mm), coarsely chopped (55 mm), or finely chopped (24 mm median particle length). Cows were fed silage ad libitum and supplemented with 6 kg concentrate. Early harvested silage significantly decreased total ration eating (ET), rumination (RT) and chewing time (CT) per kg silage DM compared with normal harvested silage (CT = 38 vs. 46 min kg-1 DM). Chopping of silage reduced CT significantly, mainly due to reduced ET, CT = 45, 41 and 39 min kg-1 DM for rations with long, coarsely and finely chopped silage, respectively. Grass silage chop length did not influence diet digestibility, but there was a significant effect of harvesting time on digestibility. No interaction between harvesting time and chop length was found, neither for chewing activity nor digestibility.",

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AU - Garmo, T.H.

AU - Randby, Å.T.

AU - Eknæs, M.

AU - Prestløkken, E.

AU - Nørgaard, Peder

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N2 - Round bale grass silage harvested early (D-value 757 g kg-1 DM) or at a normal (D-value 696 g kg-1 DM) time was used to study the effect of harvesting time, chop length and their interaction on chewing activity and digestibility by dairy cows. Six early lactating Norwegian Red cows were used in a 6 x 6 Latin square with 3-week periods. Chewing activity was measured using IGER Behaviour recorders, and digestibility was measured by total collection of faeces. The two silages were fed long (170 mm), coarsely chopped (55 mm), or finely chopped (24 mm median particle length). Cows were fed silage ad libitum and supplemented with 6 kg concentrate. Early harvested silage significantly decreased total ration eating (ET), rumination (RT) and chewing time (CT) per kg silage DM compared with normal harvested silage (CT = 38 vs. 46 min kg-1 DM). Chopping of silage reduced CT significantly, mainly due to reduced ET, CT = 45, 41 and 39 min kg-1 DM for rations with long, coarsely and finely chopped silage, respectively. Grass silage chop length did not influence diet digestibility, but there was a significant effect of harvesting time on digestibility. No interaction between harvesting time and chop length was found, neither for chewing activity nor digestibility.

AB - Round bale grass silage harvested early (D-value 757 g kg-1 DM) or at a normal (D-value 696 g kg-1 DM) time was used to study the effect of harvesting time, chop length and their interaction on chewing activity and digestibility by dairy cows. Six early lactating Norwegian Red cows were used in a 6 x 6 Latin square with 3-week periods. Chewing activity was measured using IGER Behaviour recorders, and digestibility was measured by total collection of faeces. The two silages were fed long (170 mm), coarsely chopped (55 mm), or finely chopped (24 mm median particle length). Cows were fed silage ad libitum and supplemented with 6 kg concentrate. Early harvested silage significantly decreased total ration eating (ET), rumination (RT) and chewing time (CT) per kg silage DM compared with normal harvested silage (CT = 38 vs. 46 min kg-1 DM). Chopping of silage reduced CT significantly, mainly due to reduced ET, CT = 45, 41 and 39 min kg-1 DM for rations with long, coarsely and finely chopped silage, respectively. Grass silage chop length did not influence diet digestibility, but there was a significant effect of harvesting time on digestibility. No interaction between harvesting time and chop length was found, neither for chewing activity nor digestibility.

M3 - Article in proceedings

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EP - 812

BT - Biodiversity and animal feed

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A2 - Gustafsson, T.

A2 - Bertilsson, J.

A2 - Dalin, G.

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A2 - Spörndly, E.

PB - Sveriges Lantbruksuniversitet (SLU)

T2 - EGF General Meeting

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ER -

Effect of grass silage chop length on chewing activity and digestibility

Abstract

Konference

Fingeraftryk

Citationsformater