Table 1. Nutrient composition of corn stover and grain harvested at different periods
Nutrient composition | Corn stover | Corn grain | SEM | Effects |
Early | Mid | Late | Early | Mid | Late | Harvest (H) | Fraction (F) | H × F |
DM, % | 92.77d | 93.45b | 94.23b | 93.69c | 94.31a | 94.28a | 0.27 | * | *** | *** |
CP, % | 7.44f | 8.35b | 7.69d | 9.10a | 7.43e | 7.81c | 0.24 | *** | ** | *** |
EE, % | 1.52c | 1.34d | 1.34d | 6.25a | 5.01b | 4.64b | 0.36 | ** | *** | ** |
NDF, % | 67.77b | 68.88a | 68.57a | 26.92c | 27.87c | 25.70d | 0.45 | *** | *** | ** |
ADF, % | 37.78b | 39.56b | 39.70a | 10.01d | 11.06d | 11.82c | 0.47 | *** | *** | *** |
OM, % | 93.54c | 92.06d | 93.88c | 98.74a | 97.99b | 98.90a | 0.32 | ** | *** | *** |
NFC, % | 16.82e | 12.49f | 16.28d | 57.47b | 57.68c | 60.75a | 0.66 | *** | *** | *** |
Means in the same row with different superscripts are significantly different.
p < 0.05,
p < 0.01,
p < 0.001.
SEM, standard error of means; NS, not significant; NFC was calculated by difference: [100-(NDF, % + crude protein, % + fat, % + ash, %)]; DM, dry matter; CP, crude protein; EE, ether extract (crude fat); NDF, neutral detergent fiber; ADF, acid detergent fiber; OM, organic matter; NFC, non-fibrous carbohydrates.