Influence of prolonged photoperiod on plasma hormone and lipid profiles By studying the effects of prolonged photoperiod on plasma lipids and plasma hormones ( Tables 4 and 5 ), our results showed that compared with the SP group, the levels of TG (p = 0.096) and NEFA (p = 0.067) of piglets in the LP group had an increasing trend at 42 d, but there was no significant difference between the two groups at 14 d.
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Impact of an extended light regimen imposed during nursery period on the performance and lipid metabolism of weanling pigs.
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