The effect of kale cultivar and sowing date on dry matter intake, crop utilization, liveweight gain and body condition score gain of pregnant, non-lactating dry dairy cows in winter in New Zealand

L Cheng, CD Groves, JM de Ruiter, RJ Dewhurst, GR Edwards

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Abstract

An outdoor grazing study on kale was conducted with pregnant, nonlactating (dry) dairy cows over a 42‐day winter grazing period commencing 9 June 2008. Kale treatments consisted of two kale cultivars varying in leaf:stem proportion (“Regal,” a leafy variety and “Caledonian,” a stemmy variety) and two sowing dates (8 November and 15 December). Measurements were made for dry‐matter (DM) utilization, apparent DM intake, liveweight gain and changes in body condition score (BCS) for a total of 120 cows allocated to three replicate groups of the four factorial treatments. Cows were offered a daily allowance of 10 kg DM/cow of kale and 2.2 kg DM/cow of straw. Pregrazing DM yield was higher for kale sown in November (16,517 kg DM/ha) than December (13,867 kg DM/ha), but was unaffected by cultivar (average 15,192 kg DM/ha). “Regal” kale had a higher percentage of leaf compared with “Caledonian” (33.6% vs. 25.6%), lower content of NDF (32.4% vs. 34.1%), but similar metabolizable energy content (12.1 MJ/kg DM for both) in the whole plant. Despite the differences in pregrazing DM yield and forage quality among treatments, no differences were found in DM utilization (between 88.5% and 90.2%), apparent DM intake (between 9.4 and 9.6 kg DM/cow.day), liveweight gain (between 0.53 and 0.67 kg/cow.day) and BCS gain (between 0.43 and 0.46 unit/cow over 42 days). Manipulation of kale yield and quality through choice of cultivar and sowing date had no effect on the performance of pregnant, nonlactating dairy cows.
Original languageEnglish
Pages (from-to)979 - 985
Number of pages7
JournalGrass and Forage Science
Volume73
Issue number4
Early online date2 Jul 2018
DOIs
Publication statusFirst published - 2 Jul 2018

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kale
liveweight gain
sowing date
dry matter intake
body condition
dairy cows
cows
winter
cultivars
crops
grazing
forage quality
energy content
metabolizable energy
leaves
straw
stems

Bibliographical note

1020289

Keywords

  • Brassica
  • Leaf and stem ratio
  • Metabolisable energy
  • Utilization
  • Winter forage

Cite this

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title = "The effect of kale cultivar and sowing date on dry matter intake, crop utilization, liveweight gain and body condition score gain of pregnant, non-lactating dry dairy cows in winter in New Zealand",
abstract = "An outdoor grazing study on kale was conducted with pregnant, nonlactating (dry) dairy cows over a 42‐day winter grazing period commencing 9 June 2008. Kale treatments consisted of two kale cultivars varying in leaf:stem proportion (“Regal,” a leafy variety and “Caledonian,” a stemmy variety) and two sowing dates (8 November and 15 December). Measurements were made for dry‐matter (DM) utilization, apparent DM intake, liveweight gain and changes in body condition score (BCS) for a total of 120 cows allocated to three replicate groups of the four factorial treatments. Cows were offered a daily allowance of 10 kg DM/cow of kale and 2.2 kg DM/cow of straw. Pregrazing DM yield was higher for kale sown in November (16,517 kg DM/ha) than December (13,867 kg DM/ha), but was unaffected by cultivar (average 15,192 kg DM/ha). “Regal” kale had a higher percentage of leaf compared with “Caledonian” (33.6{\%} vs. 25.6{\%}), lower content of NDF (32.4{\%} vs. 34.1{\%}), but similar metabolizable energy content (12.1 MJ/kg DM for both) in the whole plant. Despite the differences in pregrazing DM yield and forage quality among treatments, no differences were found in DM utilization (between 88.5{\%} and 90.2{\%}), apparent DM intake (between 9.4 and 9.6 kg DM/cow.day), liveweight gain (between 0.53 and 0.67 kg/cow.day) and BCS gain (between 0.43 and 0.46 unit/cow over 42 days). Manipulation of kale yield and quality through choice of cultivar and sowing date had no effect on the performance of pregnant, nonlactating dairy cows.",
keywords = "Brassica, Leaf and stem ratio, Metabolisable energy, Utilization, Winter forage",
author = "L Cheng and CD Groves and {de Ruiter}, JM and RJ Dewhurst and GR Edwards",
note = "1020289",
year = "2018",
month = "7",
day = "2",
doi = "10.1111/gfs.12371",
language = "English",
volume = "73",
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journal = "Grass and Forage Science",
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TY - JOUR

T1 - The effect of kale cultivar and sowing date on dry matter intake, crop utilization, liveweight gain and body condition score gain of pregnant, non-lactating dry dairy cows in winter in New Zealand

AU - Cheng, L

AU - Groves, CD

AU - de Ruiter, JM

AU - Dewhurst, RJ

AU - Edwards, GR

N1 - 1020289

PY - 2018/7/2

Y1 - 2018/7/2

N2 - An outdoor grazing study on kale was conducted with pregnant, nonlactating (dry) dairy cows over a 42‐day winter grazing period commencing 9 June 2008. Kale treatments consisted of two kale cultivars varying in leaf:stem proportion (“Regal,” a leafy variety and “Caledonian,” a stemmy variety) and two sowing dates (8 November and 15 December). Measurements were made for dry‐matter (DM) utilization, apparent DM intake, liveweight gain and changes in body condition score (BCS) for a total of 120 cows allocated to three replicate groups of the four factorial treatments. Cows were offered a daily allowance of 10 kg DM/cow of kale and 2.2 kg DM/cow of straw. Pregrazing DM yield was higher for kale sown in November (16,517 kg DM/ha) than December (13,867 kg DM/ha), but was unaffected by cultivar (average 15,192 kg DM/ha). “Regal” kale had a higher percentage of leaf compared with “Caledonian” (33.6% vs. 25.6%), lower content of NDF (32.4% vs. 34.1%), but similar metabolizable energy content (12.1 MJ/kg DM for both) in the whole plant. Despite the differences in pregrazing DM yield and forage quality among treatments, no differences were found in DM utilization (between 88.5% and 90.2%), apparent DM intake (between 9.4 and 9.6 kg DM/cow.day), liveweight gain (between 0.53 and 0.67 kg/cow.day) and BCS gain (between 0.43 and 0.46 unit/cow over 42 days). Manipulation of kale yield and quality through choice of cultivar and sowing date had no effect on the performance of pregnant, nonlactating dairy cows.

AB - An outdoor grazing study on kale was conducted with pregnant, nonlactating (dry) dairy cows over a 42‐day winter grazing period commencing 9 June 2008. Kale treatments consisted of two kale cultivars varying in leaf:stem proportion (“Regal,” a leafy variety and “Caledonian,” a stemmy variety) and two sowing dates (8 November and 15 December). Measurements were made for dry‐matter (DM) utilization, apparent DM intake, liveweight gain and changes in body condition score (BCS) for a total of 120 cows allocated to three replicate groups of the four factorial treatments. Cows were offered a daily allowance of 10 kg DM/cow of kale and 2.2 kg DM/cow of straw. Pregrazing DM yield was higher for kale sown in November (16,517 kg DM/ha) than December (13,867 kg DM/ha), but was unaffected by cultivar (average 15,192 kg DM/ha). “Regal” kale had a higher percentage of leaf compared with “Caledonian” (33.6% vs. 25.6%), lower content of NDF (32.4% vs. 34.1%), but similar metabolizable energy content (12.1 MJ/kg DM for both) in the whole plant. Despite the differences in pregrazing DM yield and forage quality among treatments, no differences were found in DM utilization (between 88.5% and 90.2%), apparent DM intake (between 9.4 and 9.6 kg DM/cow.day), liveweight gain (between 0.53 and 0.67 kg/cow.day) and BCS gain (between 0.43 and 0.46 unit/cow over 42 days). Manipulation of kale yield and quality through choice of cultivar and sowing date had no effect on the performance of pregnant, nonlactating dairy cows.

KW - Brassica

KW - Leaf and stem ratio

KW - Metabolisable energy

KW - Utilization

KW - Winter forage

U2 - 10.1111/gfs.12371

DO - 10.1111/gfs.12371

M3 - Article

VL - 73

SP - 979

EP - 985

JO - Grass and Forage Science

JF - Grass and Forage Science

SN - 0142-5242

IS - 4

ER -