The obtained main results are as follows. 1. Late harvest increased the content of soluble solid, reduced sugar, vitamin C, GSH, and soluble protein, linoleic acid, linolenic acid content and U/S value of flesh and core of Yali pear.

• 延迟采收提高了果肉和果心的可溶性固形物、还原糖、Vc、GSH、可溶性蛋白、亚麻酸、亚油酸含量和U/S值,降低了果肉和果心的相变温度,提高了鸭梨果实的抗冷性。