广东黑石顶森林群落黄果厚壳桂(Cryptocary aconcinna)幼苗生长与环境因子的相关分析

对黑石顶森林群落中黄果厚壳桂幼苗一年的生长与影响幼苗生长因子的相关性分析结果表明，土壤中氮、磷、钾含量与幼苗生长呈正相关，土壤有机质含量和pH值也间接影响幼苗生长，在水发和光照强度产大的群落中，幼苗生长与土壤水分含量呈正相关，与林内光照强度呈负相关，群落中幼苗密度较大将促进1年生幼苗的生长，各影响因子主要与1－3年生幼苗的生长具有显著的相关性，而3龄以上幼苗的生长与各因子间无显著的相关性。

ANALYSIS OF THE CORRELATION BETWEEN THE GROWTH OF Cryptocarya concinna SEEDLINGS AND EFFECTIVE FACTORS IN HEISHIDING FOREST,GUANGDONG PROVINCE

Studies of Cryptocarya concinna seedling growth were carried out in Heishiding subtropical forest, Guangdong Province. The impermanent transects of C. concinna seedlings were tagged and measured at bimonthly intervals in a year. The effecting factors of seedling growth, including edaphic factor, light intensity and seedling density in plots, were measured and the correlation between seedling height growth and effective factors were analyzed. The results showed that seedling growth is positively relate to content of nutrient elements N, P, K in soil. Litter decomposition ratio and pH value of the soil effect seedling growth indirectly. In the community that soil moisture and light intensity distribute unevenly, seedling growth is positively relate to soil moisture and negatively to light intensity. Higher seedling density is favorable to the growth of one-year-old seedling. The growth of one to three years old seedling is significantly relative to effective factors, but seedling growth above three years old is not significantly relate to effective factors.