造林技术措施对10年生马尾松幼林生长的影响

Effect of Silvicultural Techniques on Growth of Young Masson Pine Plantation

在贵州省台江县革东镇设置了反映马尾松人工造林各主要技术环节的试验林，在对试验林固定样地进行定期、定位测定的基础上，采用数量化理论Ⅰ方法分析研究了不同造林技术措施对马尾松幼林生长的影响。结果表明，主要造林技术措施对马尾松幼林生长自大到小的影响顺序为：立地选择，种源选择，造林密度，幼林施肥，整地方式。其中立地选择、种源选择和造林密度是马尾松人工造林最关键的技术环节，幼林施肥对马尾松林分的生长有一定影响，整地方式则无明显影响。运用所拟合的数量化回归模型预测马尾松幼林的树高和胸径可达到较高的精度。

Experimental masson pine stands were established in Taijiang County of Guizhou Province.The stands included main technical processes of growing masson pine plantations.Based on the yearly measures in permanent plots of the stands,the effect of different silvicultural techniques for growth of young masson pine plantation was studied by adopting quantitative theory I method.The results of the study showed that from great to little order of effects of the main silvicultural techniques to growth of young masson pine plantations was :site selection,seed origin selection,planting density,young stand fertilization and soil preparation. Site selection,seed origin selection and planting density were the most important techniques of planting masson pine plantation.Young stand fertilization had effect in a certain degree to the growth of masson pine stands,and soil preparation way had no obvious effect.The fitted quantitative regression models could be used to forecast height and DBH of the young stands,and the forecast precision was high.