巨桉引种试验研究

在云南省热带及亚热带地区进行巨桉多点引种试验结果表明,巨桉在我省的北热带、南亚热带及中、北亚热带自然条件较好的试点均表现了良好的速生性,树高、胸径年均生长量一般分别高于2m和2cm,最好的分别达4.36m和5.54 cm,已达到或超过当地现有桉类及原产地和国内其它引种省区的生长水平。本文分析研究了巨桉在我省热带及亚热带地区的适应性,适生范围、条件和生长发育特性,初步划分了我省六个巨桉适生区域类型,为巨桉在我省推广发展奠定了科学基础。

AN INTRODUCTION TRIAL OF EUCALYPTUS GRANDIS

An introduction trial conducted in Yunnan shows that the species of Eucalyptus grandis displays a good growth rate in some areas with ideal water and temperature condi-tions in the tropical and subtropical regions of the province.The average annual increases in trunck height and D.B.H.are generally over 2 m and 2 cm respectively with their respective upper fimits being 4.36m and 5.54cm,which are equal to or even higher than those or other Eucalytus species introduced at earlier time and those in their original habi-tat or other introduction regions of China. This article deals with the adaptability,the range and conditions of adaptation and the growth characteristics of Eucalyptus grandis.6 adaptive site types have primarily been set up for the growth of the species in Yunnan Province,which provides a scientific basis for its greater development in the province.