Pig Crates calculation for 100 sows farm
1.Calculation of farrowing crates: Birthing bedThe average annual production per sow is 2.3 litters, 52 weeks a year, piglets are weaned for three weeks, and the sow needs to stay in the sow's farrowing crate for five weeks, with one sow per pen. So, 100 (basic number of sows) * 2.3 (average number of sows per year) / 52 (weeks per year) = 5, 5 * 5 (sow time in farrowing crates) / 1 = 25, so 25 farrowing crates are needed.
2.Calculation of mating crates.：Breeding bar After the sow stops nursing piglets, it will take 5-7 days to be bred again, which is generally calculated as 1 week. After breeding, it takes 21-28 days to confirm the pregnancy, which is generally calculated as 4 weeks. Empty crates disinfection time is 1 week. Crates weeks = 1 week + 4 weeks + 1 week = 6 weeks, with one sow per pen. Therefore, 100 (basic number of sows) * 2.3 (average annual production per sow) / 52 (weeks per year) = 5, 5*6 (weeks of crates needed) = 30, so 30 mating crates are needed.
3.Calculation of the number of gestation crates：Pregnancy barThe gestational feeding time is 114 days, excluding the mating feeding time of 4 weeks, and entering the sow farrowing crates 1 week earlier, plus 1 week for disinfection. (114/7-4-1+1)=12.3. One head per pen. So, 100 (basic number of sows) * 2.3 (average annual production per sow) / 52 (weeks per year) = 5, 5 * 12.3/1 = 62, so 62 gestation crates are needed.
4. Calculation of gilts crates ：Gilt pens
The number of gilt crates = annual update quantity / 52 * feeding time of gilt pens / number of heads per pen. The annual turnover rate of basal sows is 40% (in fact, the maximum does not exceed 30%), and each crate is housed with 5 pigs. The gilt crate is housed for 9 weeks. (A farm is raised in a large pig house for 170 days, an isolation house for another 30 days, and then in a reserve pen for 30 days, that is, it is raised to 230 days for breeding.) Therefore, update the number of sows: 100*30%/ 52*9/5=1, so 1 gilts crate is needed.
5. Calculation of boar crates ：Production of boar pens
The ratio of male and female pigs for this cross is 1:25 (actually 1:20), the ratio of male and female pigs for artificial insemination is 1:100 (actually 1:40), and the number of boars in each crate is 1. So the number of crates for heavy boars is: 100/20=5 or 5 crates and 100/40=3, so 3 boar crates are needed.
6. Calculation of reserve boar crates ：Reserve boar pen
Base boars have an annual renewal rate of 50% (in fact, 100% on a farm), 1 pig per crate, and a 9-week reserve boar crates (feeding program on a farm). Therefore, the number of crates for updating pigs is: 5*100%/52*9=1, so 1 reserve boar crate is needed.
7. Calculation of nursery crates ：Conservation bar
The average litter weaned was 10 pigs, and each pen was reared with 20 pigs. Raised to 25 kg. 7 weeks + 1 week disinfection = 8 weeks 230*10/52*8/20=18, so 18 nursery crates are needed.
8.Calculation of fattening crates ：Fattening pensThe average litter weaned was 10 pigs (not considering the survival rate), and 20 pigs were raised in each crate. Raised to 100 kg. 15+1 week disinfection = 16 weeks 230*10/52*16/20=36, so 36 fattening crates are needed.
1.Calculation of farrowing crates: Birthing bedThe average annual production per sow is 2.3 litters, 52 weeks a year, piglets are weaned for three weeks, and the sow needs to stay in the sow's farrowing crate for five weeks, with one sow per pen. So, 100 (basic number of sows) * 2.3 (average number of sows per year) / 52 (weeks per year) = 5, 5 * 5 (sow time in farrowing crates) / 1 = 25, so 25 farrowing crates are needed.
2.Calculation of mating crates.：Breeding bar After the sow stops nursing piglets, it will take 5-7 days to be bred again, which is generally calculated as 1 week. After breeding, it takes 21-28 days to confirm the pregnancy, which is generally calculated as 4 weeks. Empty crates disinfection time is 1 week. Crates weeks = 1 week + 4 weeks + 1 week = 6 weeks, with one sow per pen. Therefore, 100 (basic number of sows) * 2.3 (average annual production per sow) / 52 (weeks per year) = 5, 5*6 (weeks of crates needed) = 30, so 30 mating crates are needed.
3.Calculation of the number of gestation crates：Pregnancy barThe gestational feeding time is 114 days, excluding the mating feeding time of 4 weeks, and entering the sow farrowing crates 1 week earlier, plus 1 week for disinfection. (114/7-4-1+1)=12.3. One head per pen. So, 100 (basic number of sows) * 2.3 (average annual production per sow) / 52 (weeks per year) = 5, 5 * 12.3/1 = 62, so 62 gestation crates are needed.
4. Calculation of gilts crates ：Gilt pens
The number of gilt crates = annual update quantity / 52 * feeding time of gilt pens / number of heads per pen. The annual turnover rate of basal sows is 40% (in fact, the maximum does not exceed 30%), and each crate is housed with 5 pigs. The gilt crate is housed for 9 weeks. (A farm is raised in a large pig house for 170 days, an isolation house for another 30 days, and then in a reserve pen for 30 days, that is, it is raised to 230 days for breeding.) Therefore, update the number of sows: 100*30%/ 52*9/5=1, so 1 gilts crate is needed.
5. Calculation of boar crates ：Production of boar pens
The ratio of male and female pigs for this cross is 1:25 (actually 1:20), the ratio of male and female pigs for artificial insemination is 1:100 (actually 1:40), and the number of boars in each crate is 1. So the number of crates for heavy boars is: 100/20=5 or 5 crates and 100/40=3, so 3 boar crates are needed.
6. Calculation of reserve boar crates ：Reserve boar pen
Base boars have an annual renewal rate of 50% (in fact, 100% on a farm), 1 pig per crate, and a 9-week reserve boar crates (feeding program on a farm). Therefore, the number of crates for updating pigs is: 5*100%/52*9=1, so 1 reserve boar crate is needed.
7. Calculation of nursery crates ：Conservation bar
The average litter weaned was 10 pigs, and each pen was reared with 20 pigs. Raised to 25 kg. 7 weeks + 1 week disinfection = 8 weeks 230*10/52*8/20=18, so 18 nursery crates are needed.
8.Calculation of fattening crates ：Fattening pensThe average litter weaned was 10 pigs (not considering the survival rate), and 20 pigs were raised in each crate. Raised to 100 kg. 15+1 week disinfection = 16 weeks 230*10/52*16/20=36, so 36 fattening crates are needed.