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. 2019 Dec 25;98(1):skz379. doi: 10.1093/jas/skz379

Table 4.

Effect of incremental dietary energy density during late gestation and lactation on the coefficient of apparent total tract digestibility of DM, OM, ash, CP, neutral detergent fiber (NDF), ether extract (EE), and GE, as well as DE concentration, sow feed and energy intake, and lactation efficiency

Dietary treatment LL L H HH
MJ DE/kg 13.8 14.5 15.2 15.9 SEM P-value1
Number of sows 10 10 10 10
Digestibility coefficients
 DM 0.857 0.863 0.859 0.873 0.0046 0.08
 OM 0.886 0.891 0.889 0.895 0.0045 0.57
 Ash 0.428 0.429 0.434 0.474 0.0187 0.27
 CP 0.886 0.883 0.880 0.893 0.0055 0.39
 NDF 0.545A,B 0.545A,B 0.481A 0.570B 0.0246 0.07
 EE 0.773a 0.885b 0.910b 0.933c 0.0166 <0.001
 GE 0.869 0.875 0.872 0.885 0.0056 0.22
DE, MJ/kg2 13.9a 14.5b 15.0b 15.7c 0.08 <0.001
Number of sows 25 25 25 25
Lactation feed intake1
 Total, kg 184.9 181.7 183.6 187.8 2.62 0.38
 Average, kg/d3 7.2 7.1 7.1 7.3 0.10 0.49
Total lactation energy intake
 MJ DE4 2,567.8a 2,639.3a,b 2,752.0b 2,939.2c 38.94 <0.0001
 MJ NE5 1,747.8a 1,854.7b 2,000.8c 2,174.1d 27.70 <0.0001
Average lactation energy intake
 MJ DE/d4 99.7a 102.3a,b 106.4b 113.7c 1.50 <0.0001
 MJ NE/d5 67.9a 71.9b 77.4c 84.1d 1.07 <0.0001
Lactation efficiency, g/MJ DE6 32.0a 27.5b 28.6a,b 26.2b 1.14 <0.01

1Treatements with different superscript letters within a row are considered significantly different at P < 0.05 and as tendencies at P > 0.05 but less than P < 0.10. Lactation length (days) was used as a covariate for the analysis of sow lactation feed intake.

2Calculated as DE = [analyzed dietary GE value (MJ/kg) × GE digestibility coefficient (%)].

3Average lactation length = day 26 ± 0.1.

4Calculauted using analyzed dietary DE values.

5Calculated using calculated dietary NE values.

6Calculated as: lactation efficiency = [total litter weight gain between days 1 and 26 of lactation (kg) × 1,000/sow lactation energy intake (MJ DE)].