The production of thymic peptides and thymin activity in ZD group were lower than those in AL group (P<0.0);
The production of thymic peptides and thymin activity in ZD group were lower than those in AL group (P<0.0);
ZD组胸腺的胸腺肽含量、胸腺素活性低于AL组（P＜0．0）。
The production of thymic peptides and thymin activity in ZD group were lower than those in AL group (P<0.0);
ZD组胸腺的胸腺肽含量、胸腺素活性低于AL组（P＜0．0）。