What are the construction principles for a standardized sheep farm?

With the rapid development of large-scale mutton sheep farming, the problem of blindly building farms has become increasingly prominent. In some farms, the sheep sheds and equipment structures do not conform to the production process, making diseases difficult to control during production and leading to low production performance. Below, let us take a look at the construction principles for a standardized sheep farm.

Planning and layout of a sheep farm

1. Zoning plan for the sheep farm: A sheep farm is usually divided into three functional areas, namely the management area, the production area, and the sick sheep management area. When planning the zones, the first consideration should be livestock health, with the principle of establishing the best production links and sanitation and epidemic prevention conditions to arrange the location of each zone. Generally, according to the main wind direction and slope direction, the order is arranged as follows: living area, management area, forage and feed processing and storage area, disinfection room, sheep sheds, sick sheep management area, isolation room, treatment room, harmless treatment facilities, biogas digester, hay drying yard, hay storage shed, etc. There should be a certain safety distance between the zones, preferably 300 m, and at the same time, sewage from the living area and management area should be prevented from flowing into the production area.

2. Building layout of the sheep farm: The sheep production process includes the feeding management and breeding of breeding sheep, lamb rearing, feeding management and fattening of growing sheep, transport and storage of forage and feed, and disease prevention and control. These processes are all carried out in different buildings and are functionally linked to one another. The building layout must make overall arrangements for these functional links, striving for compact configuration and small land occupation while also meeting sanitation and fire safety requirements, ensuring the shortest transport, power supply, and water supply routes, facilitating the formation of a flow operation line, and realizing specialized and orderly production in the production process.

3. Setting up exercise yards and internal roads for sheep: The exercise yard should be selected in a place sheltered from the wind and facing the sun, with a slight slope, so as to facilitate drainage and keep it dry. It is generally set on the south side of the sheep shed, 60 cm or more below the ground level of the shed, sloping gently to the south, preferably with brick paving or sandy loam, to facilitate drainage and keep it dry. A 1.2-1.5 m high fence or wall should be set around it, and a drainage ditch should be set outside the fence. Sunshades or trees should be set on both sides (south and west) of the exercise yard, with an area of 4 sq m per adult sheep. The width of roads within the sheep farm should be determined according to actual conditions. The requirements are: convenient for transport and compliant with epidemic prevention conditions; roads for transporting forage and livestock products should not be shared with or cross roads for transporting sheep manure; the veterinary room should have a separate road that is not shared with or crossed by other roads.

Sheep shed design for a sheep farm

1. Breeding shed: Also called the adult sheep shed. Breeding rams, replacement sheep, and sheep in early pregnancy (3 months) are raised in groups in this shed. Double-row housing is generally adopted. Breeding rams are kept in individual pens, while young sheep and adult ewes are kept in one row, sharing the same exercise yard; sheep in early pregnancy are kept in one row, sharing one exercise yard. Open, semi-open, or closed styles are all acceptable, but the closed style should be adopted as much as possible.

2. Farrowing shed: In late pregnancy, ewes enter the farrowing shed and are kept in individual pens of about 2 sq m each. Farrowing pens are 4 sq m. The sheep bed should be thickly bedded with litter, and lamb supplementary feeding pens should be provided. Double-row housing is generally adopted. Ewes in late pregnancy are kept in one row, sharing the same exercise yard; farrowing ewes are kept in one row, sharing one exercise yard. Open, semi-open, or closed styles are all acceptable, but the closed style should be adopted as much as possible.

3. Lamb shed: After weaning, lambs enter the lamb shed. Qualified female lambs enter the replacement sheep shed at 6 months of age, while male lambs are marketed after fattening. They should be raised and managed in groups according to age, strength, and size. The key is keeping warm, using a closed style. Double-row or single-row housing are both acceptable.

Note: The classification of sheep sheds is not absolute. They can also be divided into lamb sheds, fattening sheep sheds, breeding sheds (breeding rams, replacement sheep, non-pregnant ewes), early-pregnancy sheep sheds, and late-pregnancy sheep sheds. During design, single-row or double-row housing can be used. The sheep sheds should not be too complex; being convenient to manage is enough.

Design parameters of sheep sheds

1. Area of sheep sheds and exercise yards: The area of sheep sheds should be determined according to the number of sheep and the rearing method, and is generally calculated at a ratio of 1:1.53.

2. Temperature and humidity of sheep sheds: In winter, the minimum temperature of lambing sheds should be kept above 10°C, and that of general sheep sheds above 0°C. In summer, the shed temperature should not exceed 30°C. Sheep sheds should be kept dry, the ground should not be too damp, and the relative air humidity should be below 70%.

3. Ventilation and air exchange: For closed sheep sheds, good ventilation and air exchange performance is essential, so that stale air inside the shed can be discharged in time and the air kept fresh.

4. Lighting: The lighting area is usually determined by the height, span, and window size of the sheep shed. In actual design, it should be handled flexibly according to the principle of both facilitating heat preservation and convenient ventilation.

5. Length, span, and height: The length, span, and height of the sheep shed should be determined according to the selected building type and area. The span of a single-slope sheep shed is generally 5-7 m, that of a double-slope single-row sheep shed is 6-8 m, and that of a double-row shed is 10-12 m. The eaves height of the sheep shed is generally 2.4-3.0 m.