【摘要】 为了有目的的培育杨树人工林，并为其合理设计、投入、抚育管理及采伐等提供科学依据，讨论Ⅰ－６９杨树人工林５个密度组（１１种密度）的林分生长规律，建立了三种具有Ｓ型增长的林分生长模型．并选出最适宜的ｃｈａｎｔｅｒ模型预测林分的生长，探讨林分的数量成熟龄。结果表明，不同密度组达到数量成熟的年龄不一样、密度较大的林分，首先进入数量成熟，密度较稀疏的林分达到数量成熟相对较晚。林木的单株材积生长随密度的增加而递减，林分总蓄积量的初期生长随造林密度的增加而递增，密度为（５ｍ×６ｍ，６ｍ×６ｍ）的林分后期生长量最大。不同密度林分连年生长量在６～１３ａ间处于生长峰值。更多还原

【Abstract】 To provide scientific basis for silviculture, management and cutting cycle ofthe poplar plantation, the growth of 5 different density group (if differentdensity) poplar stand was studied. Three kinds of S-type growth model wereestablished for poplar stands. The chanter growth model is best suited tosimulate are as follows: The maturity of different density stands is different thematunty of highas density stands are smaller than lower density stands. Thevolume growth of trees are decreasing as the stand density increasing, The initialvolume gsowth of stands are increasing as the planting density increasing. Thefattes volume growth of stands which stand density group is (5in ×6m, 6m×6m) is highest. The annual groWth of different density stands which stand ageis 6-13a is the peak.更多还原