秦巴山区濒危植物红豆杉的更新及其濒危原因分析

Population Regeneration and Endangered Causes of Taxus Chinensis in Qinling and Dabasha Mountains

秦巴山区总共设置标准样方74个,调查红豆杉个体数目513株,其中结籽个体44株,占红豆杉个体总数目的8.6%;大巴山调查样方23,红豆杉个体(胸径大于5cm)65株,幼苗数量52株,两者的比例约为1:1;秦岭北坡的调查样方13个,红豆杉个体46株,幼苗数量1株;秦岭南坡调查样方38个,红豆杉个体402株,幼苗数量206株,大于5 cm胸径红豆杉与幼苗的比例为2:1。研究结果表明红豆杉的更新能力低,种群缺乏较强的竞争力。

This study investigated 513 Taxus Chinensis（ Pilger） Rehd trees,of which there are8. 6% trees,i. e.44 having seeds individuals that are in 74 quadrats in Qinling and Dabasha mountains in Shaanxi Province. We surveyed 46 individuals and 1 young plant sample in 13 quadrats in the nouth of Qinling Mountains. There have 402individuals and 206 yang plants in 38 samples in southern Qinling Mountains. Therefore,it has low population regeneration and population competitiveness.