Introduction to Pig Production
Designed as a quick‑reference guide for students, extension agents, and new swine producers.
| Aspect | Key Points |
|---|---|
| Economic | - High feed‑to‑gain efficiency (≈2.5 kg feed per 1 kg gain). - Short production cycle (≈6 months to market). - Strong global demand for pork and pork by‑products. |
| Nutritional | - Pork provides high‑quality protein, B‑vitamins, iron, and zinc. |
| Socio‑cultural | - Integral to many cuisines and rural livelihoods. |
| Environmental | - Manure can be recycled as fertilizer or biogas feedstock when managed properly. |
| Feature | Description |
|---|---|
| Classification | Mammal, order Artiodactyla, family Suidae. |
| Reproductive Traits | - Polyestrous (cycles every 21 days). - Gestation ≈ 114 days (≈3 ½ months). - Litter size: 8–12 piglets (large breeds up to 20). |
| Growth | - Birth weight: 1–1.5 kg. - Market weight (finisher): 100–130 kg. - Daily gain: 0.6–0.9 kg in optimal conditions. |
| Digestive System | - Monogastric, omnivorous. - Stomach pH ≈ 2–4; efficient carbohydrate and fat digestion. |
| Thermoregulation | - Limited sweat glands; rely on behavior and environment to maintain body temperature (18–24 °C optimal). |
| System | Description | Typical Scale | Advantages | Limitations |
|---|---|---|---|---|
| Extensive (Outdoor/Free‑range) | Pigs roam on pasture or woodland; minimal confinement. | Small farms (<50 sows). | Low capital, natural behavior, manure spread on land. | Higher disease exposure, slower growth, weather‑related losses. |
| Semi‑intensive (Partial confinement) | Sows housed, piglets moved to outdoor pens; some feed supplementation. | Medium farms (50–200 sows). | Better feed control, moderate biosecurity. | Requires more management, land for pens. |
| Intensive (Commercial) | All stages housed in climate‑controlled buildings; total feed formulation. | Large operations (>200 sows). | Maximal growth rates, high biosecurity, efficient labor. | High capital, waste handling challenges, animal welfare scrutiny. |
| Niche / Specialty | Organic, heritage breeds, “grass‑fed” pork, or integrated crop‑livestock systems. | Variable | Premium market price, consumer appeal. | May need certification, lower yields. |