Characteristics and risk factors for severe repeat-breeder female pigs and their lifetime performance in commercial breeding herds
نویسندگان
چکیده
منابع مشابه
Characteristics and risk factors for severe repeat-breeder female pigs and their lifetime performance in commercial breeding herds
BACKGROUND Repeat-breeder females increase non-productive days (NPD) and decrease herd productivity and profitability. The objectives of the present study were 1) to define severe repeat-breeder (SRB) females in commercial breeding herds, 2) to characterize the pattern of SRB occurrences across parities, 3) to examine factors associated with SRB risk, and 4) to compare lifetime reproductive per...
متن کاملReproductive profile and lifetime efficiency of female pigs by culling reason in high-performing commercial breeding herds
Materials and methods: Lifetime records were analyzed for 62,775 females in 101 Japanese commercial herds. Culling reasons were categorized into four groups. Three herd groups were based on the upper and lower 25th percentiles of pigs weaned per mated female per year: high-, intermediate-, and low-performing herds. Annualized lifetime pigs born alive (PBA) was calculated as the sum of PBA in th...
متن کاملBy-parity nonproductive days and mating and culling measurements of female pigs in commercial breeding herds.
The objectives of this study were to determine by-parity nonproductive female days (NPD or NPDs) and mating and culling measurements, to determine correlations between by-parity NPDs, mating and culling measurements and herd productivity measurements, and to compare by-parity NPDs between three herd groups (105 herds) with differing reproductive productivities. NPD was defined as the number of ...
متن کاملeffect of bataine and sulphate supplement on wool and milk characteristics and lambs performance in naine ewes
تعداد 20 رأس میش نژاد نائینی 6+-24 ماهه، با میانگین وزن 2/3-+40 کیلوگرم، همراه با 20 رأس بره های آنها در قالب طرح کاملا تصادفی اثر بتائین و مکمل سولفات بر خصوصیات شیر و پشم و عملکرد بره ها بررسی شد. میش ها بطور تصادفی در چهار تیمار قرار گرفتند. تیمارها عبارت بودند از: 1-گروه شاهد 2-بتائین (05/0 درصد ماده خشک) 3-سولفات (24/0 سولفور درصد ماده خشک 4-بتائین هرماه با سولفات. جیره غذائی طبق nrc با مح...
15 صفحه اولFactors for improving reproductive performance of sows and herd productivity in commercial breeding herds
We review critical factors associated with reproductive performance of female breeding pigs, their lifetime performance and herd productivity in commercial herds. The factors include both sow-level and herd-level factors. High risk sow-level groups for decreasing reproductive performance of female pigs are low or high parity, increased outdoor temperature, decreased lactation feed intake, singl...
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ژورنال
عنوان ژورنال: Porcine Health Management
سال: 2017
ISSN: 2055-5660
DOI: 10.1186/s40813-017-0059-0