摘要
对泡桐（Ｐａｕｌｏｗｎｉａｆｏｒｔｕｎｅｉ（Ｓｅｅｍ．）Ｈｅｍｓｌ．）、香椿（Ｔｏｏｎａｓｉｎｅｎｓｉｓ（Ａ．Ｊｕｓｓ．）Ｒｏｅｍ．）、木蝴蝶（Ｏｒｏｘｙｌｕｍｉｎｄｉｃｕｍ（Ｌ．）Ｖｅｎｔ）、枳木具（ＢｅｒｃｈｅｍｉａｄｕｌｃｉｓＴｈｕｎｂ．）、扁斗青冈（ＱｕｅｒｃｕｓｈｕｉＣｈｕｎ）和罗浮柿（ＤｉｏｓｐｙｒｏｓｍｏｒｒｉｓｉａｎａＨａｎｃｅ）等亚热带森林乔木树种在不同光强条件下的种子萌发及其幼苗生长进行观察。泡桐和枳木具种子在光（１００％）条件下的萌发率最高，香椿和罗浮柿种子在轻阴（６２．２％）条件下的萌发率最高，木蝴蝶和扁斗青冈种子在中阴（３４．４％）条件下萌发率最高。阳性树种泡桐、香椿、木蝴蝶和枳木具幼苗生长速度较快，属速生型树种，其幼苗在自然光条件下的总生物量最大；扁斗青冈和罗浮柿幼苗生长较慢，其幼苗在轻阴条件下的总生物量最大。在重阴（０．６％）条件下，幼苗均出现生长不良或停止。
Seeds of Paulownia fortinei (Seen )Hemsl ,Toona sinensis (A Juss ) Roem ,Oroxylum indicum (L )Vent ,Berchemia dulcis Thunb ,Quercus hui Chun and Diospyros morrisiana Hance were collected from Guangdong and Guangxi Seed germination and seedling growth of the tree species were examined under different light intensities The experiments showed that the highest germination percentage of seeds of P fortunei (93 5%)and B. dulcis (6 4%)were under natural light (100%) condition ,but that of T sinensis (92 3%)and D morrisiana (76 4%) were under light shade (62 2% of natural light),while the highest gemination percentage of O indicum and Q hui,which occured under intermediate shade (34 4% of natural light),were 85 7% and 97 5% respectively The seedlings of P fortunei,T sinensis,O indicum and B dulcis grew fast,showing that they are fast growing trees Seedling biomasses of these four species were the highest under light condition.Seedlings of Q hui and D morrisiana showed slow growth and the most accumulated biomass of the seedlings were found under light shade The seedling of all the species showed the worst growth or died under the deep shade (0 6%) condition
出处
《生态科学》
CSCD
1996年第2期6-12,共7页
Ecological Science
基金
国家自然科学基金
关键词
亚热带
森林
乔木
种子萌发
幼苗生长
光强度
subtropical forest tree,seed germination,seedling growth,biomass
