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Dr. Lü Jirong was invited to deliver a keynote speech at the 3rd Sunbird Conference on Antibiotic-Free Development in the Animal Husbandry Industry.

Release time：

2019-04-26

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April 16–17, Organized by Kunpeng Bird Media and hosted by the editorial office of Feed Industry Magazine, The 3rd Sunbird Conference on Antibiotic-Free Development in the Livestock Industry The event opened at the Honglin Grand Hotel in Nanning, Guangxi. The conference invited industry veterans—including Academician Makangsen, Academician Yin Yulong, and Professor Chen Daiwen—to share cutting-edge technologies, innovative theories, and new approaches in the fields of alternative and reduced antibiotic use. Dr. Lü Jirong, Deputy General Manager of DDC, was invited to deliver a keynote speech titled "Key Nutritional Technologies for Mother-and-Offspring Integration." Below is a summary of the main points from her presentation.

I. Current Status of Pig Production in China

China accounts for a share of the world 19 The population has supported a share of the world. 56.6% Pigs—China's pork consumption accounts for a global share of 49.9% , in China CPI In the index, the impact index of pork prices accounts for 30% , accounting for CPI Of the index 8% , Output value 1.3 Trillion, sow PSY At 2018 Reach the year 20.2 Head, but due to the absence of African swine fever, in 2019 The number of breeding sows in stock for the year is 2973 Ten thousand heads—currently, China's average litter size is 12.1 Head, number of live piglets per litter 10.1 Head, number of weaned piglets per litter 8.8 Head, egg and milk survival rate 88% , Annual number of piglets produced 20 Head;

II. The Significance of Mother-Child Integration

Definition: A systematic engineering approach designed around the interconnected relationships between sows and piglets, tailored to their specific physiological stages.

Enhancing Economic Efficiency: Piglets Born off by just a couple of ounces, weaning weight differs by a pound, and by the time it hits the market, the difference is ten pounds.

Key Performance Indicators for Sows ( PSY Non-production days \ Number of live piglets born

The Significance of Mother-Child Integration

III. The Foundation of Mother-Child Integration — Gilt pigs

The Impact of Birth Weight in Gilts on Reproductive Performance:

※ The sows' birth weight of the back litter is 1.58 kg or more, with an estrus onset occurring approximately 18 days earlier, a 2.4-fold increase in ovulation numbers, and an embryo survival rate improved by about 14%.

Key indicators for gilts

1 Breeding time: 2-3 This mating season

2 , Breeding Age: 220–270 Sky

3 , Breeding weight: 130-140kg

4 , Breeding back label thickness: P2: 18-20mm

5 , Aphrodisiac Supplement Feeding: Two Weeks Before Mating

6 · Initial Day of Age: 180–210 Sky

IV. The Foundation of Mother-Child Integration - Pregnant sow

Key nutrients for pregnant sows

※ Different feeding levels during early pregnancy have varying effects on plasma progesterone and embryo survival rates—specifically, embryos from sows subjected to feed restriction exhibit higher survival rates compared to those from non-restricted sows.

※ In the late stages of gestation, appropriately increasing the feeding amount ensures that piglets achieve higher daily weight gains compared to piglets born to sows fed a standard diet—while also facilitating weaning. - The interval between estrus cycles will also shorten;

Key Indicators for Integrated Sow and Piglet Management during Gestation

1 • Physical condition: Normal 3 Minutes, become leaner: Increase 300g/ Heavens, too fat: Reduce 300g/ Sky

2、65 Sky Back Fat: 16-18mm; Normal: Feeding 2.26kg , low back fat 4mm , increase feed intake 600g/ Sky

3 • Sow weight: Increasing by one litter, approximately more 40 Kilograms; 140 Kilograms: Feed Intake 2.1 Kilograms, increase 200 Kirk

4 • Temperature: Suitable 18-20 Degree, each lower 3 Degree, gilts 140g/ Heaven, the sow that has given birth 200g/ Sky

※ Properly adding fiber to pregnant sows can significantly improve their reproductive performance (daily NDF Intake amount is 220–365g, It can significantly improve the reproductive performance of sows, increasing both the birth weight per litter and the weaning weight per litter, while also helping to relieve constipation in sows. High-fiber diets have been shown to enhance sow fertility and overall reproductive efficiency during farrowing.

※ Additionally: Special attention should be paid to the stomachs of pregnant sows (fiber content, feed particle size). 2mm The requirement is greater than 50% Above, the feed form is powder, and the protein level must not be too high.

V. Key Technologies for Mother-Child Integration - Lactating sow

The milk yield of high-producing sows

Key metrics:

※ Lactation ability and milk yield ：

1、182kg Daily lactation 11 Kilograms, DM ：18%；

2 • Enhance milk production: To increase nutritional concentration,

3、NRC2012 Regarding the energy and amino acid requirements of high-producing sows, these related concentrations increase as feed intake decreases.

3、 AA Balance: Lys:AA:Thr:Trp = 100:55:67:19 ； VAL/lys = 87 The above;

4 Digestible energy 3.46 Mcal/kg, Lys The proportion from 0.95%–1.3% , it was discovered that due to the first-parity sows consuming low 10-15% , coupled with its low ability to mobilize body weight, therefore Lys Requires a high daily intake and concentration;

5 , Dietary protein from 12-18 At that time, the sow's weight increased. 6.4kg , the piglet's weaning weight increased to 6.8 Kilograms, while the interval between estrus periods shortened, and both litter size and number of live piglets increased;

6 The ambient temperature is at 29 During this period, the sow's daily feed intake was higher than 22 Increase the duration 42.4% , Piglets show increased daily weight gain 22% ）

※ Sucking reflex:

1 , Oxytocin ---- Stimulates the contraction of mammary duct myoepithelial cells to release milk.

2 When a suckling pig feeds, the sensory input stimulates specific brain regions, triggering activity in the hypothalamus, which in turn enhances the pulsatile release of oxytocin from the neurohypophysis.

3 , Previous 5 For nipples with strong lactation ability, weak piglets 3-4 Regarding foster care

※ The Need for Water ：

※ The Nutrition of Milk

※ Different sources of fat have varying effects on the fat content of sow's milk; appropriately adding animal fats can help increase weaning litter weight and improve piglet survival rates.

※ Flavor Link: Feeding cheese-flavored weaned piglets significantly boosted their feed intake compared to the control group. 40% , indicating that piglets show a preference for cheese flavor; meanwhile, weaned piglets exhibited a relatively higher average number of feedings of milk aroma compared to the control group. 119.5% , feeding time relatively increases 109.5% , the difference is significant, and feed intake has increased. 18.1% , feeding speed increases 9.5% ; Explaining that piglets have a preference for frankincense;

This is what we often refer to as Imprint effect