Influence of sward height, concentrate supplementation and season on grazing activity of beef cows

被引：0
|
作者：
Gekara, OJ [1 ]
Prigge, EC [1 ]
Bryan, WB [1 ]
Schettini, M [1 ]
Nestor, EL [1 ]
机构：
[1] W Virginia Univ, Div Anim & Vet Sci, Morgantown, WV 26506 USA
来源：
PROCEEDINGS OF THE XIX INTERNATIONAL GRASSLAND CONGRESS: GRASSLAND ECOSYSTEMS: AN OUTLOOK INTO THE 21ST CENTURY | 2001年
关键词：
sward height; supplementation; grazing; cattle;
D O I：
暂无
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The influence of sward height, concentrate supplementation and season on daily pattern of forage consumption of lactating beef cows grazing cool season pastures was determined. Cows (n=24; BW=535+/-10.8 kg) were randomly assigned to eight plots maintained at sward heights (SH) of either 4-8 cm or 8-12 cm and fed three levels of concentrate supplement: none = 0 kg/day, low = 3.12 kg/day or high = 6.24 kg/day. Cows on lower SH had greater (P<08) forage dry matter intake and spent an additional 1.2 hours/day (P<.01) grazing compared to the higher SH. Cows on lower SH consumed 7.7 kg/day of forage dry matter and grazed 9.4 hours/day whereas those on higher SH consumed 7.1 kg/day and grazed 8.2 hours/day. Cows on lower SH grazed 0.7 hours/day (P<06) and 0.4 hours/day (P<08) longer at 06:00- 10:00 hour and 11:00- 13:00 hour, respectively, compared to the higher SH. Grazing efficiency (kg of forage consumed/hour of grazing) decreased (P<01) as season progressed. Season influenced duration of grazing activity (P<01). Cows grazed 0.5 hours longer (P<.01) at 06:00-10:00 hour late in summer (August) compared to spring (May) and mid summer (June/July). Cows grazed 0.3 hours longer (P<08) at 11:00-13:00 hour during spring compared to late summer.
引用
收藏
页码：305 / 306
页数：2
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