Effect of Silvicultural Techniques on Growth of Young Masson Pine Plantation

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.