生态环境学报2009，Vol.18Issue(5)：1908-1913,6.
铺地榕对不同土壤磷营养水平的生理生态学响应
Ecophysiological response of Ficus tikoua to different soil phosphorous content
摘要
Abstract
Three Gorges region is rich in mineral resources, especially in phosphate mineral resources. Mining wastelands not only damaged local ecosystem, but also caused the loss of water and soil, and river eutrophication in the Three Gorges region. In order to reveal the mechanism of plant species' adaptation to high soil phosphorous content and select appropriate pioneer species for waste-land restoration, the ecophysiological response of Ficus tikoua seedlings to different soil phosphorous level were studied in this paper through control experiment. Results showed that P_n, T_r, G_s ChL soluble sugar and some parameters related with root growth in-creased when phosphorous treatment ranged from 0～360 mg·L~(-1), and then decreased gradually with the increase of phosphorous treatment concentration. The light saturation curve and carbon dioxide saturation curves of the species demonstrated that its light saturation point and carbon dioxide saturation were about 800 μmol·m~(-2)·s~(-1) and 1 000 μmol·mol~(-1) respectively, which indicated the Ficus tikoua preferred growing in sunny condition. The ability of organs absorbing and storing phosphorus was root> stem> leaf. The highest phosphorus content of plants reached 1.13 % in the experiment. All of these suggested that Ficus tikouat has good absorption ability and can adapt to a wide range of soil phosphate. Ficus tikouat is a potential pioneer species which can be used to restore the phosphorous mining wasteland.关键词
铺地榕/净光合速率/蒸腾速率/磷矿废弃地/三峡库区Key words
Ficus tikoua/ net photosynthetic rate(P_n)/ transpiration rate(T_r)/ phosphate waste land/ the Three Gorges reservoir area分类
农业科技引用本文复制引用
郭彦荣,陈芳清,郄光武,曾旭..铺地榕对不同土壤磷营养水平的生理生态学响应[J].生态环境学报,2009,18(5):1908-1913,6.基金项目
湖北省自然科学基金项目(2006ABA199) （2006ABA199）
湖北省教育厅重点科研项目(D200513005) （D200513005）
