紫叶稠李是北方引进的重要彩叶树种之一.本文介绍了紫叶稠李种子采集、种子处理、播种育苗等技术.

In this study,the sample data were based on stem analysis of 84 trees from Dahurian larch(Larix gmelinii Rupr.) plantation located in Dailing forestry bureau,Heilongjiang Province.The relationship of bark thickness at breast height with diameter at breast height(D),total height(H),crown width(CD),crown ratio(CR),crown length(CL) and relative height(RH) were explored.Bark thickness model of Dahurian larch was established using multiple linear regression analysis method.Results show that the optimal form of the model is BT=0.4221+0.0583D-0.046H.Both the model test(F=32.46,P<0.0001) and fit statistics(R2 = 0.5155,RMSE=0.3014) further confirm that the model can describe the variation of bark thickness of Dahurian larch better.The paper is of great importance for sustainable forest management of Dahurian larch plantation.