一、引言杉树为我国南方主要造林树种之一,虽然用种子繁殖和萌芽条扦插繁殖都比较容易,但在广泛推行造林良种化的今天,这两种方法都显然有较大的缺点。众所周知,用种子繁殖优树,其后代将会产生大量分化和变异,不能稳定地保持母树原来的优良性 I. Introduction Cunninghamia lanceolata is one of the main afforestation species in South China. Although seed propagation and sprout cutting are easy, it is obvious that both of these methods have obvious shortcomings in the widespread afforestation. It is well-known that the propagation of superior trees with seeds will produce a great deal of differentiation and variation in their offspring and will not be able to stably maintain the original goodness of the trees