香叶树人工林与天然林群落特征及生长过程比较

Comparison of Community Characteristics and Growth of Plantation and Natural Forest of Lindera communis

对香叶树人工林与天然林群落特征及生长过程的比较结果表明:两种林分群落特征和生长过程存在明显差异,人工林林相整齐,林分结构简单,郁闭度较大;天然林多为萌蘖次生林,林相不整齐,林冠具有成层性,林下植被生物量大.人工林胸径前期生长较快,天然林胸径前期生长较慢;人工林胸径速生期和生长高峰出现时间比天然林来得早,但持续时间比天然林短.人工林树高前期生长较快,天然林树高前期生长极为缓慢;人工林树高速生期比天然林来得早,生长速度也比天然林快,而天然林前期受压明显.人工林材积速生期和材积生长高峰比天然林来得早,而天然林的数量成熟相对较迟.

The community characteristics and growth procedure of the natural forest and plantation of Lindera communis were compared through investigation. The results indicated that there were significant differences in the indexes studied between the differently originated forests. The plantation of Lindera communis had greater coverage, tidier forest form and simpler structure, whereas the natural forest of Lindera communis had untidier forest form,multi - layered canopy, greater under - story biomass because it was secondary stand from sprouts. There was also significant difference between the natural forest and plantation of Lindera communis in DBH, height and standing volume growth features. These growth indexes of the plantation in the early stage after planting were greater and the fast -growing -phase of DBH and height growth indexes came earlier than those of the natural forest. The fast - growing - phase and growth peak of standing volume of the Lindera communis plantation came earlier so the plantation reached its quantitative maturity stage earlier than that of the natural forest.