延長光照處理對泌乳山羊之影響
Date Issued
2005
Date
2005
Author(s)
DOI
932313B002100
Abstract
The long daily photoperiod was proved to improve dairy cattle production;
however, its effect on dairy goat was unclear. In this study, we intended to enhance
dairy goat production by long daily photoperiod. Fourteen Alpine dairy goats (11
multiparous, 3 primiparous) were evenly assigned to long daily photoperiod (LP, 16
h of light and 8 h darkness/d) or natural daily photoperiod (NP) according to parity,
kidding date, and body condition. Light were turn on at 0400 till 2000 for the LP
group, and light intensity was set more than 600 lux at goats’ eyes level. The
experimental period was 22 weeks after kidding (from Feb 2005 to Aug 2005). Same
diet was offered to each group according to the NRC lactating dairy goat
recommendation. Goats were milked twice daily, and milk were weighed and
sampled on last two days each week. Results showed that long daily photoperiod
had no effect on lactose and milk fat concentrations and raw milk total bacterial
number (P > 0.05). Milk yield on weeks 3, 6, and 7 tended to be increased by long
daily photoperiod (3.37 vs. 2.34 kg / d; 3.54 vs. 2.24 kg / d; 3.61 vs. 2.54 kg / d; P <
0.10). The 4% fat corrected milk (4%FCM) had similar results as milk yield. The
long daily photoperiod increased 4%FCM and feed intake by 30.2% (P = 0.208) and
41.4% (P < 0.0001) on average.
Subjects
Dairy goat
Long daily photoperiod
Milk production
Publisher
臺北市：國立臺灣大學動物科學技術學系暨研究所
Type
report
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