印楝生物学特性及引种栽培

The Biological Characters of Azadirachta indica and Result of Introduction and Cultural Trail

报道了印楝的形态特征和3个来自不同水分条件的印楝种源在引种地的适应性及经济性状的表现。初步认为3个印楝种源:(1)物候期不同;(2)保存率、生长量、结果枝数、结果枝比等生长指标也都存在明显差异;(3)种子的印楝素含量>0.4%,高于原产地的平均水平。从适应性和经济性状比较,来自干旱、半干旱地区的2种源优于来自湿润地区种源。

This is a brief description of the morphological characters. The ecological adaptabilities and the economical characters of three provenances of Azadirachta indica from different rainfall level have been studied: (1) Phonological phases are distinct; (2) The difference of some growth indexes such as survival rate, biomass, the number of branches with fruits and the ratio of genital branches to the total branches are remarkable; (3) The content of azadiractin in the seeds of three provenances are above 04%. According to the ecological adaptability and economical characters of trees, two of the three provenances from arid and semiarid regions excell than the provenance from humid region.