思茅松人工林生长与立地条件的关系研究

Relation between Growth Increments of Pinus kesiya var. langbianensis and Site Condition

研究思茅松生长与地形因子、土壤理化性质之间的关系,旨在为思茅松适地适树及制定营林措施提供依据;分别采用了单因子分析和逐步回归分析对思茅松树高生长指标与海拔、坡向、坡度及有机质、全氮、全磷、全钾、有效氮、有效磷、有效钾、土壤的pH值之间的关系进行研究;单因子分析结果表明,思茅松树高生长指标与海拔呈显著负相关,而与坡度、土壤厚度、有效磷之间呈显著或极显著的正相关;逐步回归分析结果表明,海拔、全钾、有效磷及其组合是影响思茅松生长的主要因子。

This paper aimed at giving some evidences of the relation between growth increment ofPinus kesiya var. langbianensis plantation and site conditions basis on the investigating materials on plantation .The results of simple regression showed that the altitude was negatively closely correlated to the height increment of top tree and mean tree of plantation,then soil depth, available phosphorous were closely correlated to them. The results of stepwise variable showed that the main factors effecting tree growth were altitude, total potassium, available phosphorous. The simple equations were worked out based on dada analysis.