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在相同样栽植密度下,窄冠黑杨4株团试验林,比行状栽植的窄冠黑杨材积生长量提高20.3%。该研究成果打破了传统的行状配置模式,实现了造林模式创新。以3株团中林-46杨幼林期调查数据表明,定植第一年团状林与行状林生长量基本相同,第二年至第四年团状林材积生长量分别是行状林的89.6%、95.8%和101.3%。这表明,团状造林在幼龄期(1～3a)生长量低于行状林,因此团状配置不适宜培育小径材,是培育中、大径材的丰产栽培模式。
Under the same planting density, the growth volume of Pinus tabulaeformis 4 plantation was 20.3% higher than the growth of Pinus sibirica. The research results broke the traditional pattern of configuration and realized the innovation of afforestation mode. According to the survey data of the young stands of Zhonglin-46 in the three strains, the growth volume of the clumpy forest and the crooked forest was the same in the first year of colonization. The growth of clump forest volume in the second year to the fourth year was 89.6% , 95.8% and 101.3% respectively. The results showed that the growth of the clumpy afforestation was lower than that of the ringed afforestation in the juvenile period (1 ~ 3a). Therefore, the clump allocation was not suitable for cultivating the small diameter timber and was the high yield cultivation mode for cultivating medium and large diameter timber.