- 期刊
台灣母豬離乳至發情間距分析
Data Analysis for Weaning-to-Estrus Intervals of Sows in Medium to Intensive Pig Farms in Taiwan
摘要
Production performance at 11 pig farms in the year 2,000 in Taiwan was monitored using PigCHAMP® software. Data analysis was performed for weaning-to-estrus intervals (WEls) of 16929 farrowing records. Results demonstrated that 87.3% of the sows returned to estrus within 7 days post weaning. The mean WEI was 7.5 days for all serviced sows. Sows with lactation length ＜ 18 days, 1st parity, nursing≦5 piglets and weaned at moderate (≧24.6℃) to high environmental temperature had WEls of 15.8, 11.0, 10.0 and 7.7-8.0 days, respectively, which were significantly (P＜0.05) longer than those of other sows. Of all sows serviced, 8% had delayed estrus, which occurred between 11 and 35 days post weaning with the most severe delay shown by primiparous sows. Among the primiparous sows, 13.1% had delayed estrus. A linear relationship (R^2=0.82) between WEI and repeat service rates was found for primiparous sows with WEI≦10 days. Results from this study indicate that useful information can be obtained using PigCHAMP® database analysis. Such information can provide guidance for producers to improve the reproduction efficiency in pig herds.
並列摘要
Production performance at 11 pig farms in the year 2,000 in Taiwan was monitored using PigCHAMP® software. Data analysis was performed for weaning-to-estrus intervals (WEls) of 16929 farrowing records. Results demonstrated that 87.3% of the sows returned to estrus within 7 days post weaning. The mean WEI was 7.5 days for all serviced sows. Sows with lactation length ＜ 18 days, 1st parity, nursing≦5 piglets and weaned at moderate (≧24.6℃) to high environmental temperature had WEls of 15.8, 11.0, 10.0 and 7.7-8.0 days, respectively, which were significantly (P＜0.05) longer than those of other sows. Of all sows serviced, 8% had delayed estrus, which occurred between 11 and 35 days post weaning with the most severe delay shown by primiparous sows. Among the primiparous sows, 13.1% had delayed estrus. A linear relationship (R^2=0.82) between WEI and repeat service rates was found for primiparous sows with WEI≦10 days. Results from this study indicate that useful information can be obtained using PigCHAMP® database analysis. Such information can provide guidance for producers to improve the reproduction efficiency in pig herds.