Method of increasing or maintaining the reproductive performance of sows

a sow and reproductive performance technology, applied in the field of sows and feed compositions, can solve the problems of affecting overall profitability, affecting and affecting the overall profitability, so as to increase the number of sows and maintain the reproductive performance of sows.

Inactive Publication Date: 2015-09-10
PORK CRC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Ractopamine supplementation during lactation increases the number of sows returning to oestrus, decreases the weaning-to-oestrus interval, and enhances the number of progeny pigs weaned per sow, thereby improving reproductive performance and overall sow productivity.

Problems solved by technology

However, the length of time that sows remain productive within commercial operations also plays a major factor in their profitability and economic success.
Current sow culling rates are excessive and often sows are removed from the breeding population before reaching their breakeven parity.
This situation can affect overall profitability.
However, premature culling of breeding sows tends to fall into two distinct categories:Very early culling of gilts and parity 1 sows on the basis of reproductive failure and locomotor problems.Culling around parities 3-5 for poor reproductive performance.
Similar poor sow reproductive performance is also reported in most other major pig producing countries.
For many years it has been thought by most within the research community that the limitation to improved reproduction is simply a matter of improving the implementation of existing knowledge to producers.
However, with national herd statistics showing that reproduction is not improving, pig producers are highlighting that this approach must be combined with both large scale studies that report on longevity and research into the fundamental nutritional and management requirements, in particular because of today's genetically lean genotypes.
Studies have shown that modification of the gilt's fat reserves as she enters the breeding population through protein restriction or increased feeding levels rarely demonstrates an improvement in reproductive performance over several parities.
Likewise, no improvement in reproductive performance has been seen by increasing fatness in sows fed high energy diets during successive pregnancies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Supplementary Ractopamine During Lactation Reduces Sow Weight Loss and Improves Reproductive Performance

[0100]Sixty large white first parity sows were allocated to one of two treatment groups (n=30 sows / treatment). One group (CONT) received a standard lactation diet (0.71 g available lysine / MJ digestible energy (DE)) throughout lactation, whilst the other group (RAC) received the standard lactation diet supplemented with ractopamine at 10 ppm from d 1-13 of lactation and 20 ppm from d 14 of lactation until mating. The amount of feed offered each day was stepped up gradually, reaching 5 kg / day by d 4 of lactation, and maintained at this level for the rest of lactation. Sows were weighed and P2 backfat measured on d 1, 14 and 20 of lactation, the litter size standardised to 9 piglets within 24 hours of lactation. Sows were weaned on d 21 of lactation, with boar exposure commencing 4 d after weaning and sows artificially inseminated twice at their first oestrus post-weaning. Subsequent...

example 2

Effect of Paylean Treatment During First Lactation on Maternal Muscle Catabolism and Post-Weaning Fertility

[0102]This experiment was conducted at the University of Adelaide's Pig and Poultry Production Institute (PPPI) at Roseworthy, South Australia, with approval from the animal ethics committees of Primary Industries and Resources South Australia and The University of Adelaide. The experiment used sixty Large White / Landrace parity 1 sows, and was conducted in four replicates: replicates one and two were run in October and November 2006, respectively (spring); and replicates three and four were run in March and April 2007, respectively (autumn).

[0103]At entry into the farrowing shed, Sixty Large White / Landrace first parity sows were weighed, and P2 backfat and maximum eye muscle depth (MMD) measured. Sows were then stratified according to both liveweight and body composition and allocated to one of two treatment groups (n=30 sows). One group (Control) received a standard lactation ...

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Abstract

The present invention relates to methods and feed compositions for increasing or maintaining the reproductive performance of sows. More particularly, the present invention relates to methods of increasing or maintaining the reproductive performance of sows by administering a biologically active compound during lactation, and food compositions comprising said biologically active compound for the purposes of increasing or maintaining the reproductive performance of sows. The present invention also relates to a method of increasing or maintaining ovarian function in sows.

Description

[0001]This application claims the benefit of the filing date of U.S. Provisional Application Ser. No. 61 / 408,101 filed 2010 Oct. 29, which is incorporated by reference herein.FIELD OF THE INVENTION[0002]The present invention relates to methods and feed compositions for increasing or maintaining the reproductive performance of sows. More particularly, the present invention relates to methods of increasing or maintaining the reproductive performance of sows by administering a biologically active compound during lactation, and food compositions comprising said biologically active compound for the purposes of increasing or maintaining the reproductive performance of sows. The present invention also relates to a method of increasing or maintaining ovarian function in sows.BACKGROUND OF THE INVENTION[0003]Sow productivity has traditionally been defined as the number of progeny pigs weaned per sow per year. However, the length of time that sows remain productive within commercial operation...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61K31/137A23K1/18A23K1/16A61D19/02
CPCA61K31/137A23K1/16A23K1/184A61D19/02A23K20/00A23K50/30A61P13/08A61P15/08
InventorVAN WETTERE, WILLIAM
OwnerPORK CRC