舟山海岛普陀樟等3种特有树种种质资源清查

通过清查,发现普陀樟Cinnamomum japonicum var. chenii集中分布于舟山市普陀区所辖范围内的洛伽山、朱家尖岛以及以朱家尖、桃花、六横岛为中心的毗邻悬水小岛上,种质资源比较丰富,全市共有结果母树1.2万余株,大年种子产量有1500 kg左右。舟山新木姜子Neolitsea sericea分布在普陀区的朱家尖、桃花、普陀山和定海区的大猫岛,其分布特点是孤立,散生,且范围极小,无成片分布,共有结果母树300余株,种质资源较为贫乏,加之不合理的采种,迄今大年种子产量仅为100 kg。南京椴Tilia miqueliana分布范围更是有限,主要分布在桃花岛蚂蝗坑和定海区大猫岛茅草屋冷坑,呈群落分布,共有结果母树170余株,每年种子产量极少,能采到的种子只有0.25 kg左右。表3参12

Resources of Cinnamomum japonicum var.chenii,Neolitsea sericea and Tilia miqueliana in Zhoushan Archipelago

Cinnamomum japonicum var.chenii,Neolitsea sericea and Tilia miqueliana are local tree species of Zhoushan Archipelago.This research was to investigate the numbers and the distribution of the three species.Cinnamomum japonicum var.chenii is mainly distributed in Mount Luojia,Zhujiajian Island and some other small islands around Zhujiajian,Taohua and Liuheng Island.There are more than 12 000 seed trees of Cinnamomum japonicum var.chenii,which can produce about 1 500 kg seeds in high yield year.Neolitsea sericea is distributed in Zhujiajian Island,Taohua Island,Mount Putuo and Damao Island,its distributional characteristic is isolated and scattered and small area.There are only 200 seed trees of Neolitsea sericea,which produce 100 kg seeds in high yield year.The scope of Tilia miqueliana is limited in Mahuangkeng of Taohua Island and Maocaowulengkeng of Damao Island.There are about 170 seed trees of Tilia miqueliana,which only 0.25 kg seeds were gathered per year.[Ch,3 tab.12 ref.]