广东黑石顶森林群落黄果厚壳桂幼苗出生和死亡特征

Studies on Cryptocarya concinna Seedling Natality and Mortality in Neishiding Forest

对黑石顶森林群落中黄果厚壳桂种群幼苗的出生和死亡的定位研究结果表明：黄果厚壳桂幼苗具有低出生率和低死亡率的特点，一年中以幼苗旺盛生长的季节死亡率最高，且死亡者主要是１年生和２年生的幼苗，３年以上幼苗很少死亡。幼苗出生和死亡与种群密度。

Studies on Cryptocarya concinna seedling natality and mortality were carried out in Heishiding subtropical forest.C.concinna seedlings in permanent transects were tagged,measured and recensused at bimonthly intervals during one year period.C.concinna seedings have low natality and mortality.The mortality was highest in growing season around the year and 1～2 years old seedlings have the highest mortality.Seedling mortality above 3 year old has not been investigated.Factors affecting seedling natality and mortality such as seedling density,light in forest and soil water are different as unlike conditions of conmmunity.