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为检验落叶松的大垅造林的生长效果,我们分别在一九六九年营造的四百五十亩的林地内,对大垅和穴植两种造林方法,进行了机械抽样调查。经过调查,这两种方法,虽然在造林时间,立地条件,苗令都相同,可是,由于栽植方法不同,落叶松生长的效果却有显著的差异。造林后六年,大垅造林落叶松平均树高3.76米,而穴植造林平均树高1.94米。平均地径:大垅造林为4.4厘米,穴植造林为3.4厘米,保存率大垅造林为94.1％,穴植造林为46.3％,现将大垅和穴植造林生长效果列下表
To test the growth effects of Larix chinensis afforestation, we conducted a mechanical sampling survey of two afforestation methods of Larval and Seeding respectively in 450 acres of woodland built in 1969. After investigation, these two methods, although in the afforestation time, site conditions, Miao Ling are the same, however, due to different planting methods, the effect of larch growth there are significant differences. In the six years after afforestation, the average tree height of afforestation Larix sibiricus is 3.76 meters, while the average height of a hole planting afforestation is 1.94 meters. Average diameter: 4.4 cm for afforestation, 3.4 cm for point afforestation, 94.1% afforestation for afforestation and 46.3% for afforestation, and the results are given in the table below