不同寄主植物对檀香幼苗生长和光合特性的影响

Effects ofDifferent Host Plants on Growth and Photosynthesis Characteristics of Santalum album Seedlings

为筛选出檀香(Santalum album)在云南生长的优良寄主植物,选择了白酒草(Conyza japonica)、山合欢(Albizia kalkora)、旱冬瓜(Alnus nepalensis)、龙葵(Solanum nigrum)和檀香一起种植,测定檀香幼苗生长量、生物量、吸器数量和大小、光合特性等指标。结果表明,这些指标在不同寄主之间存在很大差异。檀香幼苗和白酒草、旱冬瓜共生时各生长指标显著高于山合欢、龙葵和对照。檀香幼苗和白酒草共生时的各生长指标最高,但与旱冬瓜差异不明显。檀香幼苗期的生长发育一般至少要5年的时间,白酒草生长周期较短,因此,木本植物旱冬瓜是檀香苗期的优良寄主植物。

In order to screen out the excellent host plants of Santalum album in Yunnan,Conyza japonica,Albizia kalkora,Alnus nepalensis and Solanum nigrum were planted together with Santalum album.The growth,biomass,haustorium number and size and photosynthetic characteristics of Santalum album were determined.The results showed that there were great differences in these indexes among different hosts.When S.album seedlings coexisted with Conyza japonica and Alnus nepalensis,the growth indexes were significantly higher than coexisted with Albizia kalkora,Solanum nigrum and the contrast.The growth indexes were the highest when S.album seedlings coexisted with Conyza japonica,but no significant difference with Alnus nepalensis.The growing of S.album in seedlings stage generally takes at least 5 years.The growing cycle of Conyza japonica was short.Therefore,the woody plants of Alnus nepalensis was the excellent hosts for S.album seedlings.