华南地区固氮与非固氮豆科树种叶片养分利用策略的对比研究  

Different Leaf Nutrient Use Strategies of Nitrogen-fixing and Non-nitrogen-fixing Leguminous Trees in South China

作　　者：叶楠[1,2,3] 刘慧 罗琦[2,3] 林忆雪 侯皓 叶清 赖闻玲 YE Nan;LIU Hui;LUO Qi;LIN Yixue;HOU Hao;YE Qing;LAI Wenling(College of Life Sciences,Gannan Normal University,Ganzhou 341000,Jiangxi,China;Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystem,Guangdong Provincial Key Laboratory of Applied Botany,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;South China National Botanical Garden,Guangzhou 510650,China;Key Laboratory of Nanling Plant Resources Conservation and Utilization,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣南师范大学生命科学学院,江西赣州341000 [2]中国科学院华南植物园,退化生态系统植被恢复与管理重点实验室,广东省应用植物学重点实验室,广州510650 [3]华南国家植物园,广州510650 [4]赣州市南岭植物资源保护与利用重点实验室,江西赣州341000

出　　处：《热带亚热带植物学报》2023年第3期334-340,共7页Journal of Tropical and Subtropical Botany

基　　金：江西省教育厅科技项目(GJJ170839)资助。

摘　　要：为探究富氮环境中固氮(nitrogen-fixing leguminous trees,NLT)与非固氮豆科树种(non-nitrogen-fixing leguminous trees,n-NLT)的叶片养分利用策略差异,以华南地区5种NLT植物[水黄皮(Pongamia pinnata)、大叶相思(Acacia auriculiformis)、朱樱花(Calliandra haematocephala)、海南红豆(Ormosia pinnata)、台湾相思(Acacia confusa)]和3种n-NLT植物[油楠(Sindora glabra)、中国无忧花(Saraca dives)、银珠(Peltophorum tonkinense)]为对象,测定其单位质量叶片碳(C)、氮(N)和磷(P)含量及其比值、单位面积叶片最大净光合速率(Aarea)和叶片光合氮、磷利用效率(PNUE、PPUE)等功能性状。结果表明,NLT的单位质量叶片N、P含量和Aarea均显著高于n-NLT,而两者PNUE和PPUE无显著差异;尽管两类植物单位质量叶片C含量无显著差异,但NLT的叶片C:N和C:P显著低于n-NLT。因此,这表明华南地区NLT比n-NLT具有更强的养分获取和光合能力,但叶片养分利用效率更低。To reveal leaf nutrient use strategies of nitrogen-fixing leguminous trees(NLT)and non-nitrogen-fixing leguminous trees(n-NLT)under the nitrogen-rich environments in South China,five NLT(Pongamia pinnata,Acacia auriculiformis,Calliandra haematocephala,Ormosia pinnata,Acacia confuse)and three n-NLT(Sindora glabra,Saraca dives,Peltophorum tonkinense)were selected,the concentrations of carbon(C),nitrogen(N)and phosphorus(P)per leaf mass,leaf C:N and C:P,maximum net photosynthetic rate per leaf area(Aarea),photosynthetic nitrogen use efficiency(PNUE)and photosynthetic phosphorous use efficiency(PPUE)were measured.The results showed that N and P contents and Aarea of NLT were significantly higher than those of n-NLT,whereas their PNUE and PPUE had not significant difference.Although there was no significant difference in leaf C content between two types of species,leaf C:N and C:P of NLT were significantly lower than those of n-NLT.Therefore,these indicated that NLT in South China had stronger nutrient acquisition and photosynthetic capacity than N-NLT,but lower leaf nutrient utilization efficiency.

关 键 词：豆科 固氮作用 养分性状 华南地区 

分 类 号：Q948[生物学—植物学]