1.Application of flaxseed in the production of fattening pigs
ω-3 fatty acids
|Alpha-linolenic acid (ALA)||Octadecatrienoic acid, essential fatty acid for human body|
|DHA||docosahexaenoic acid, brain gold|
|EPA||Eicosapentaenoic acid, a vascular scavenger|
Main nutrients and fatty acid composition of flaxseed (%)
Adding 10% flaxseed in the feed can significantly increase the content of ω-3 unsaturated fatty acids in the longissimus dorsi, abdominal fat and back fat of pigs.
Compared with lard low in ω-3 unsaturated fatty acids, lard rich in omega-3 unsaturated fatty acids can significantly reduce serum low-density lipoprotein cholesterol levels.
2.Application of linseed oil in sow production
64 sows were randomly divided into 2 treatment groups, each group had 32 replicates, and each replicate had 1 sow.
Add 3.5% linseed oil to sow diet:
Increase weaning weight of piglets.
Increase the content of n-3 unsaturated fatty acids in sow milk and piglet tissue, and increase the content of DHA and EPA in piglet brain.
Increase the content of immunoglobulin G and A in colostrum and milk of sows.
Increase the content of immunoglobulin G, A and lysozyme in plasma of sows and piglets.
3.Application of fish oil in sow production
A total of 60 3-5 pregnant sows with the same breed and similar body condition were selected and divided into 4 groups with 15 sows in each group. The experiment lasted for 28 days from 107d of gestation to the weaning of piglets at 21 days of age.
Fatty acid composition in sow milk is affected by dietary fatty acid composition of sows. Coconut oil significantly increased the contents of C12:0 and C14:0 in sows’ milk, palm oil significantly increased the contents of C16:0 in sows’ milk, and soybean oil significantly increased the contents of C18:2n-6 in sow’s milk.
With the increase of the length of fatty acid carbon chain in feed fat, the grain size of sow milk fat pellets increased. Coconut oil can significantly reduce the average size of milk fat sphere.
The contents of IgG and IgA in plasma of female piglets in soybean oil group were significantly higher than those in coconut oil and palm oil groups.
4.Effects of soybean phospholipid on performance and milk composition of lactating sows
The experiment lasted from 107 days of gestation to 21 days of weaning
Adding soy phospholipids to the lactating diet:
Increase weaning weight of piglets and reduce diarrhea rate of piglets during lactation
Increase the content of lecithin and lecithin in milk
Reduce the fat pellet size of sow’s normal milk
Increase the IgA content in plasma and milk of sows and in plasma of piglets
5.Harm of oxidized soybean oil on weaned piglets
Twenty-eight piglets were divided into two groups. One group was fed 3% fresh soybean oil and the other group was fed 3% oxidized soybean oil.
Dietary supplemented with oxidized soybean oil can induce intestinal oxidative stress, increase the content of inflammatory factors, decrease the activity of digestive enzymes, and destroy intestinal barrier function of piglets.
6.Toxic effects of oxidized soybean oil on lactating sows and their offspring
Soybean oil dosage: 3%; FSO group (fresh soybean oil, pov=11.5mEq/kg) and OSO group (oxidized soybean oil, pov=96mEq/kg).
Oxidized soybean oil can increase the levels of plasma pro-inflammatory factors IL-6 and IL-8, decrease the content of milk fat in normal milk of lactating sows, increase the content of pro-inflammatory factors in milk, and reduce the expression of tight connector protein ZO-1 at weaning of piglets.
- The structure and level of dietary fatty acids can be reflected in pig blood, meat and milk
- Increasing the dietary n-3 fatty acid level can improve the immunity and production performance of pigs.
- Soybean phospholipid can reduce the fat pellet size of sow milk and improve the production performance.
- Oxidized fat harms the health of female piglets and increases the content of proinflammatory factors.
- It is important to accurately determine the dietary fat content and fatty acid balance of pigs at different stages.