Photosynthetic characteristics of dipterocarp species planted on degraded sandy soils in southern Thailand
Photosynthetic characteristics of dipterocarp species planted on degraded sandy soils in southern Thailand
复制标题
泰国南部退化沙质土壤上种植的龙脑香属植物的光合特性
DOI：
10.1007/s11099-005-0080-4
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发表时间：
2005
期刊：
影响因子：
2.7
通讯作者：
K. Kojima
中科院分区：
文献类型：
--
作者：
M. Norisada;K. Kojima
为了阐明龙脑果作为东南亚热带森林后期演替优势种在露天种植时的光合特性是否存在劣势，我们对泰国南部退化沙质土壤露天种植龙脑果幼苗的光合特性进行了研究。并与野生相思幼苗进行了比较。，一种生长迅速的热带豆科树木，通常种植在东南亚退化的空地上。二龙脑幼苗的净光合速率（PN）、气孔导度（gs）、羧化效率和光合能力与马姜相当或优于马姜。特别地，对龙柏幼苗进行了研究。进行筛选。其辐照饱和PN值为21µmol m−2 s−1，高于以往报道的任何一种双子果，同时具有高gs值（0.7 mol m−2 s−1）和高光合能力。因此，在沙质土壤退化的开阔场地上，二龙果类植物的光合特性并不一定处于劣势。
To elucidate whether dipterocarp species, dominant late-successional species of tropical forests in Southeast Asia, actually have a disadvantage when planted on open site in terms of their photosynthetic characteristics, we investigated photosynthesis in dipterocarp seedlings planted in the open on degraded sandy soils in southern Thailand. These species were compared with seedlings of Acacia mangium Willd., a fast-growing tropical leguminous tree, which is often planted on degraded open site in Southeast Asia. The dipterocarp seedlings had an irradiance-saturated net photosynthetic rate (PN), stomatal conductance (gs), carboxylation efficiency, and photosynthetic capacity comparable to or superior to those of A. mangium. In particular, seedlings of Dipterocarpus obtusifolius Teijsm. ex Miq. showed an irradian-ce-saturated PN of 21 µmol m−2 s−1, a value higher than any previously reported for a dipterocarp species, accompanied by high gs (0.7 mol m−2 s−1) and high photosynthetic capacity. Thus dipterocarp species do not necessarily have a disadvantage in terms of their photosynthetic characteristics on open sites with degraded sandy soils.