Swine Production Housing Systems

9 Questions

What is the correct formula for calculating the number of sows?

(Number of Sows Culling Rate Occupancy Period 1.1) / 365 Selection Rate

According to the lighting requirements table, how many 100W incandescent bulbs are required per square meter to achieve a lighting intensity of 200 lux?

0.416

If the Boar to Sow Ratio is 1:20, what is the Selection Rate needed to maintain a 24-sow level fattener production?

(Number of Sows Culling Rate Occupancy Period 1.1) / 365

If the lighting intensity requirement is 150 lux and a 40W fluorescent lamp is used, how many lamps are needed per square meter?

0.080

What is the purpose of the 1.1 factor in the formula for calculating the number of sows?

To account for a 10% buffer in sow production

If the Culling Rate is 0.3, the Occupancy Period is 120 days, and the Selection Rate is 0.8, what is the Number of Sows required for a 24-sow level fattener production?

24 (0.3 120 1.1) / (365 0.8)

If the lighting intensity requirement is 500 lux and a 20W fluorescent lamp is used, how many lamps are needed per square meter?

0.682

If the Boar to Sow Ratio is 1:15 and the Selection Rate is 0.75, what is the Culling Rate needed to maintain a 24-sow level fattener production with an Occupancy Period of 100 days?

(24 0.75 100 1.1) / (365 15)

According to the lighting requirements table, which type of lamp requires the fewest number of bulbs per square meter to achieve a lighting intensity of 10 lux?

40W fluorescent

Study Notes

Swine Housing Systems

There are four types of swine housing systems: one-unit, two-unit, three-unit, and four-unit systems.
In the one-unit system, pigs remain in the same building from farrowing to slaughter.
In the two-unit system, sows and piglets remain in the farrowing house until weaning, then weanlings are transferred to a growing-finishing house.
In the three-unit system, sows and piglets remain in the farrowing house until weaning, then weanlings are moved to a nursery house and finally to a growing-finishing unit.
In the four-unit system, sows and piglets remain in the farrowing house until weaning, then weanlings are moved to a nursery house, then to a growing house, and finally to a finishing house.

Space Requirements

Minimum space requirements for swine vary by age and size of animal.
Space requirements range from 0.11 m2/animal for pigs up to 10 kg to 7.50 m2/animal for boar pens.
Gestating sows require 1.20 m2/animal, while lactating sows and litters require 7.40 m2/animal.

Structural Requirements

Roofing material should be made of corrugated G.I. sheets and other durable materials.
Roof should have a minimum of 1-meter overhang to provide shade and protect from rain.
Ceiling height should be at least 2.4 m high.
Building sidewalls should have a minimum height of 1 m and be made of durable materials.
Floors can be solid or slotted, with specific requirements for each.

Slotted Floors

Slotted floors should be made of concrete, plastic, or metals, and allow manure and urine to pass through.
Recommended slat width and spacing between slats vary by size and type of swine.

Storage and Waste Disposal

A well-ventilated area should be provided for feed storage, with a capacity for a two-week supply of feeds.
Waste management should follow PAES 414:2002 guidelines.

Lighting Requirements

Lighting intensity varies by type of lamp, with recommended lux levels ranging from 10 to 500.
Number of bulbs required per m2 varies by type of lamp and wattage.