中文摘要：

树种单一是造成我国沿海防护林生态系统脆弱、功能难以发挥的主要因素.对海岸多变环境条件下不同树种的生长发育潜力进行评估有利于沿海防护林建设的树种选择.本实验用TPS一1便携式光合系统测定烟台海岸带6个树种柽柳、黑松、龙柏、白蜡、廊坊杨和刺槐的光合性能指标,同时测定了其碳素利用效率、光合氮利用效率和灰分含量等,并用隶属函数法计算了6个树种的综合资源利用效率,以评定其生长发育潜力.结果表明,6个树种的饱和光强都较高,均适宜在较强光照条件下生长,但柽柳、黑松和龙柏的表观光量子效率、光合速率和光能利用效率均显著低于白蜡、廊坊杨和刺槐,其中尤以龙柏最低.同时,柽柳、黑松和龙柏的光合氮利用效率和叶片碳利用效率也显著低于白蜡、廊坊杨和刺槐,但是其水分利用效率则普遍高于后者;矿质元素利用效率则是柽柳最高、黑松最低,其它4个树种居中.将6个树种对各种环境资源的利用效率与光合性能指标进行综合分析并计算资源利用效率综合指数显示,6个树种中刺槐和白蜡资源利用效率最高、廊坊杨和柽柳次之、黑松再次、龙柏最低.

英文摘要：

The scarcity of tree species is the main factor that results in the vulnerability and malfunction of coastal protection forest as an ecosystem. Assessing the growth potential of the various woody species under the harsh coastal environment will be beneficial to the selection of tree species for coastal shelterbelt construction. In this study, the photosynthetic performance indicators of 6 trees ( namely Tamarix chinensis, Pinus thunbergii, Juniperus chinensis cv kaizuka, Fraxinus chinensis, Populus langfanggensis and Robinia pseudoacacia) were determined with a TPS-1 portable photosynthesis system in the coastal forest shelterbelt of Yantai. Meanwhile, the carbon use efficiency (CUE), photosynthetic nitrogen-use efficiency(PNUE), and the ash content were determined as well. Additionally, the comprehensive indices of resource use efficiency of 6 tree species were calculated with the subordinate function for the evaluation of their growth potential. The results showed that the light saturation point for photosynthesis was relatively high in all the 6 species, which was favourable for the trees to adapt to intense light. However, the apparent quantum yield, photosynthetic rate and light use efficiency (LUE) were significantly lower in T. chinensis, P. Thunbergii and J. chinensis cv kaizuka than in F. chinensis, P. langfanggensis and R. pseudoacacia, with the J. chinensis cv kaizuka showing the lowest efficiency. In addition, the photosynthetic nitrogen-use efficiency and carbon use efficiency were also significantly lower in T. chinensis, P. Thunbergii and J. chinensis cv kaizuka than in F. chinensis, P. langfanggensis and R. pseudoacacia, but the water use efficiency (WUE) was apparently higher in the former 3 species. In terms of the mineral use efficiency (MUE), T. chinensis was at the top and P. thunbergii was at the bottom. The comprehensive index of resource use efficiency, in terms of the utilization of various resources and the photosynthetic performance indicators, could be listed in the following order fro