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. 2015 Sep 30;29(5):739–746. doi: 10.5713/ajas.15.0404

Table 2.

Productivity index of pig with the different growth stages

Growth stages
Pregnant sow Farrowing sow Weaning pig Growing pig Fattening pig
Productivity index Non-productive sow days1

  • - Number of weaners

  • - Survival rate2

 Survival rate Survival rate

  • - Appearance rate of A grade pork

  • - Days of slaughter weight at 110 kg

  • - Survival rate
1

Non-productive sow days (NPD) = 365 − [(litter/sow/year)×(gestation days+lactation days)]; adapted from Shaw (2005).

2

Survival rate (%) = [1 − (number of pigs that died/total number of pigs)]×100.