高级检索+
肖燕, 张科燕, 张树斌, 张教林. 羊蹄甲属藤本和树木叶片热值与建成成本的比较研究[J]. 植物科学学报, 2020, 38(3): 428-436. DOI: 10.11913/PSJ.2095-0837.2020.30428
引用本文: 肖燕, 张科燕, 张树斌, 张教林. 羊蹄甲属藤本和树木叶片热值与建成成本的比较研究[J]. 植物科学学报, 2020, 38(3): 428-436. DOI: 10.11913/PSJ.2095-0837.2020.30428
Xiao Yan, Zhang Ke-Yan, Zhang Shu-Bin, Zhang Jiao-Lin. Differences in leaf caloric values and construction costs between liana and tree species in Bauhinia[J]. Plant Science Journal, 2020, 38(3): 428-436. DOI: 10.11913/PSJ.2095-0837.2020.30428
Citation: Xiao Yan, Zhang Ke-Yan, Zhang Shu-Bin, Zhang Jiao-Lin. Differences in leaf caloric values and construction costs between liana and tree species in Bauhinia[J]. Plant Science Journal, 2020, 38(3): 428-436. DOI: 10.11913/PSJ.2095-0837.2020.30428

羊蹄甲属藤本和树木叶片热值与建成成本的比较研究

Differences in leaf caloric values and construction costs between liana and tree species in Bauhinia

  • 摘要: 以羊蹄甲属(Bauhinia)10种木质藤本和10种树木为研究对象,对其叶片的养分、灰分、热值与建成成本等9个指标进行测定,并分析了这些性状在两种生长型之间的差异以及性状之间的相互关系。结果显示,20种羊蹄甲属植物的干质量热值均值为18.64 kJ/g,去灰分热值均值为20.20 kJ/g。叶片热值和建成成本与碳含量显著正相关而与灰分含量显著负相关。羊蹄甲属木质藤本的叶片热值与建成成本极显著低于树木。主成分分析结果表明,木质藤本位于热值和构建成本低的一端,而树木则相反。研究结果说明,作为典型热带阳生植物,羊蹄甲属植物在存储和转化太阳能方面存在一定优势。羊蹄甲属木质藤本和树木可能采取不同的资源利用与分配策略,藤本羊蹄甲显著较低的叶片热值和建成成本,以及较低的比叶重反映其资源快速周转的策略;而树木羊蹄甲相比于藤本羊蹄甲则表现为较保守的资源利用策略。

     

    Abstract: To understand the leaf energy investment strategies of co-occurring lianas and trees, we investigated nine traits related to leaf nutrients, ash, caloric value, and leaf construction costs in 10 liana and 10 tree species of Bauhinia (Leguminosae). We also analyzed the differences in traits between two growth forms and the relationships among traits. Results showed that the means of the gross caloric value (GCV) and ash free caloric value (AFCV) of the 20 Bauhinia species were 18.64 kJ/g and 20.20 kJ/g, respectively. Both GCV and mass-based leaf construction cost were significantly and positively correlated with leaf carbon content, were significantly and negatively correlated with leaf ash content, and were significantly lower in lianas than in trees. Principal component analysis showed that lianas were negative loads of the first PCA axis with low leaf caloric values and mass-based construction costs, whereas trees showed the opposite pattern. These results indicated that, as typical tropical sun plants, Bauhinia species had some advantages in solar energy storage. Furthermore, liana and tree species in Bauhinia demonstrated different resource utilization and allocation strategies. The significantly lower caloric value, mass-based leaf construction cost, and leaf mass per area in lianas reflected a rapid resource turnover strategy, whereas trees exhibited a more conservative resource utilization strategy.

     

/

返回文章
返回