楸树是珍贵的用材树种.我国有悠久的栽培历史,在长期的人工栽培中选育出金楸、银楸和滇楸等优良栽培种。但楸树早期生长不快,是影响其发展速度的因素之一.研究解决这一问题,具有重要的经济意义.几年来,我们在探讨其生物学特性和生长规律的基础上,改进栽培技术,促进楸树早期速生。结果表明,生长最好的五年生林,年材积生长量达到1.0164m~3/亩,其中最大单株的胸径年生长量达到3.2Cm,树高年生长量1.67m,比一般种植的生长量提高一倍至三倍.说明楸树可以作为速生丰产林树种进 Catalpa bungei is a valuable tree species.Our country has a long history of cultivation, breeding long-term artificial cultivation of Sorrel, silver Catalpa and Sorbus. However, the early growth of Catalpa bungei is one of the factors which affect the speed of its development.Researching and solving this problem has important economic significance.In the past few years, on the basis of exploring its biological characteristics and growth rules, we improved the cultivation techniques, Catalpa early promote rapid birth. The results showed that the annual growth volume of the five-year-old forest with the best growth rate reached 1.0164m ~ 3 / mu, the annual increment of DBH of the largest single plant reached 3.2cm, the annual growth rate of tree height was 1.67m, Doubling to triples, indicating that Catalpa bungei can be used as a fast-growing, high-yield forest species