Read this article in:

An economic analysis of sow retention in a United States breed-to-wean system

Retaining sows in the herd longer has economic benefits that could increase the financial returns of a breed-to-wean system.

Wednesday 24 January 2018 (6 months 25 days ago)

The objective of this study was to determine the number of parities sows should be retained in a breed-to-wean system to maximize returns over total cost per weaned pig and net return on investment, and to assess the sensitivity of returns over total cost per weaned pig to feed price and number born alive (NBA).

Data used to estimate NBA and pre-weaning mortality by parity were collected between 2001 and 2014 at 17 Midwest US farms representing a total of 105,719 sows, accounting for 502,491 total records. Projected budgets were compared for various parity distribution scenarios using a “steady-state” farm model that included both variable and fixed costs associated with the farm and the proportion of sows by parity in the distribution.

The cost of producing a weaned pig was minimized by culling after parities 5 through 9, and culling after late parities (ie, parity 7 through 9) showed greater returns over culling after parities 1 through 4. Culling after parities 5 to 9 showed approximately a 15% net return on investment. When NBA increased, culling after parities 5 through 9 had the highest returns. Culling after parities 6 through 9 showed the greatest returns with low feed prices. With high feed prices, all parity distributions costs exceed returns, though culling after parities 5 and 6 came closest to breaking even.

Results indicate that retaining sows until later parities, (ie, parity 8 and 9), could be economically advantageous over culling sows after parities 1 through 4, as shown by a higher return over total cost.

Gruhot TR, Calderón Díaz JA, Baas TJ, et al. An economic analysis of sow retention in a United States breed-to-wean system. J Swine Health Prod. 2017;25(5):238–246.

Article Comments

This area is not intended to be a place to consult authors about their articles, but rather a place for open discussion among users.
Leave a new Comment

Access restricted to 333 users. In order to post a comment you must be logged in.

Not a registered user of 333?sign upand access swine prices, the search engine, ...
It is fast and free
Are you registered in 333?LOGINIf you've forgotten your password we'll send it to you here