首冠藤的生态生物学特征

Ecological and Biological Characteristics of Bauhinia corymbosa

摘要:

通过样地调查，对首冠藤(Bauhinia corymbosa)的生态生物学特征进行研究。结果表明，首冠藤是阳生性藤本植物，主要分布于热带亚热带地区光照较好的山坡、疏林边缘或村旁；耐贫瘠，适宜生长的土壤为红壤和赤红壤。其平均光合速率为3.306 μmol m-2s-1，气孔导度为0.25 mol m-2s-1，蒸腾速率为4.10 mmol m-2s-1。首冠藤对营养元素的利用率较高，植株体内N、P、K、Ca、Na、Mg加权平均养分含量分别为1.11%、0.09%、0.56%、0.86%、0.21%、0.06%，其中叶片N含量最高，枝Na含量最高，根部P和Mg含量最高。首冠藤的生态生物学特征有利于其快速生长、攀附和适应环境。

Abstract:

The physiological and ecological characteristics, and nutrient utilization of Bauhinia corymbosa were studied by plot investigation. The species is a heliophyte liana and distributes mainly in open forest fringe, hillside, and village side in tropical and subtropical areas, and grow well on the red soil and lateritic red soil. The average photosynthetic rate, stomatal conductance and transpiration rate were 3.306 μmol m-2s-1, 0.25 mol m-2s-1 and 4.10 mmol m-2s-1, respectively. The weighted nutrient contents of N, P, K, Ca, Na, and Mg in B. corymbosa were 1.11%, 0.09%, 0.56%, 0.86%, 0.21% and 0.06%, respectively. The nutrient utilization efficiency of B. corymbosa is high and N content in leaf is the highest, and do Na content in branch, P and Mg contents in root. The ecological and biological characteristics of B. corymbosa were beneficial to growing, climbing and adapting to environment.