Abstract:A pot experiment was conducted to study the effects of Ginkgo biloba leaf litters on the growth and physiological characteristics of Lactuca sativa, in which the amounts of Ginkgo biloba leaf litters added into soil were 0 (CK), 2.5, 5.0, 7.5 and 10.0 g/kg, respectively. The results showed that, compared to the CK treatment, the treatments of Ginkgo biloba leaf litters significantly inhibited the growth of lettuce, which decreased significantly the root length, stem diameter and plant height of Lactuca sativa, decreased the fresh weight of aerial part of Lactuca sativa by 11.38%, 22.54%, 32.37% and 34.82% respectively, decreased significantly the content of chlorophyll in the leaves of Lactuca sativa, and the treatment of 10.0 g/kg of Ginkgo biloba leaf litters decreased the contents of chlorophyll a, chlorophyll b, total chlorophyll and carotenoid in the leaves of Lactuca sativa by 45.24%, 56.25%, 47.72% and 38.08%, respectively; Compared to the CK treatment, the treatments of Ginkgo biloba leaf litters increased the activities of SOD, POD and CAT in in the leaves of Lactuca sativa, with the latter two increased significantly; The content of MDA in the leaves of Lactuca sativa decreased with the increase ginkgo leaf litters. On the whole, Ginkgo biloba leaf litters can produce the allelopathy on the growth and physiological resistance of Lactuca sativa, thus, comprehensively present a function of inhibition.