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三年的野外试验观察表明,林木不理想生长型的特征与林分密度有关。主干的分权、侧枝数及其宿存期、侧枝与主干结合处的增粗以及抢年生长现象都随林分密度下降而增加。关于很多树种的植距与侧枝数、侧枝大小的关系已进行过大量的试验研究。从多数试验中发现,侧枝数量和大小随林分密度减少而增加。然而,植距对主干质量的其他方面的影响则常常很少研究。例如Mua-
Three years of field experiments showed that the characteristics of tree growth and non-ideal stand type and forest density. The main branches of decentralization, the number of branches and their shelf life, the combination of collateral and trunk thickening and growth of robbery are increasing with the decline in stand density. A great deal of experimental research has been conducted on the relationship between the spacing of many tree species and the number of collateral branches and collateral diameters. It has been found from most tests that the number and size of collateral branches increase with decreasing stand density. However, the effect of planting distance on other aspects of trunk quality is often poorly studied. For example Mua-