8个山毛榉引进品种秋季叶色变化研究

Study on Leaf Color Change of 8 Beech(Fagus sylvatica)Varieties in Autumn

以加拿大引种的8个山毛榉品种为材料,通过分析其叶片可溶性糖、可溶性蛋白的含量以及秋季叶色变化期叶片的L^*、a^*、b^*值,来挑选适宜在河南地区栽植的山毛榉品种。结果表明:山毛榉叶片可溶性蛋白含量与叶色参数a~*值正相关,8个山毛榉引进品种中"Purple Fountain""Dawyck Gold Beech""Red Obelisk""Roseomarginata",这4个品种秋季出现彩叶的时间较长,叶色较为明丽,可作为彩叶山毛榉的优良品种进一步培育。

In order to select beech varieties adaptive to the Henan region,we measured soluble sugar,soluble protein and L^*,a^* and b^* values in the autumn leaves of 8 European beech(Fagus sylvatica)varieties introduced from Canada.The results show that there is a positive correlation between leaf soluble protein content and a^* value(the leaf color parameter).Among the eight beech varieties,four varieties,i.e.,‘Purple Fountain’,‘Dawyck Gold Beech’,‘Red Obelisk’and‘Roseomarginata’present a longer color-leaf stage with bright and colorful leaves,which can be further cultivated as good color-leaf beech varieties.