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对6不同岩性土壤上构树种子发和1年生苗生长发育规律进行观测分析。结果表明,构树种子发芽率及苗木高、径生长在不同岩性土壤上表现出明显的差异。灰质白云岩土壤种子发芽率最高(88.8%);其后依次为石英砂岩、变余岩、第四纪红色粘土,玄武岩;在长石砂岩土壤上种子发芽率最低(47.1%)。构树苗木高、径生长在灰质白云岩土壤上最好,年净生长量超过109 cm和1.26 cm,在长石砂岩土壤上生长最差。在不同岩性土壤上构树苗高、地径生长呈慢-快-慢的“S”形节律变化。灰质白云岩发育土壤最适宜于培育构树苗木。
The growth and development of seedlings and annual seedlings on tree species in six different lithological soils were observed and analyzed. The results showed that the seed germination rate of seedlings and seedling height, diameter growth showed significant differences in different lithology soils. The germination rate of gray soil dolomite was the highest (88.8%), followed by quartz sandstone, metamorphic rock, Quaternary red clay and basalt. The germination rate was the lowest (47.1%) on the feldspar sandstone soil. Tree sapling height, diameter growth in the gray dolomite soil best, the annual net growth of more than 109 cm and 1.26 cm, the worst growth in the feldspar sandstone soil. In different lithology soil sapling height, diameter growth was slow - fast - slow “S ” shaped rhythm changes. Gray dolomite development soil is most suitable for cultivating birch trees.