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作者调查研究了土壤温度对三种针叶树和两种阔叶树茎、根生长的影响.在恒温水浴法控制土壤温度的环境控制室内,受试验的所有树种用种子培育了两个8星期的阶段.土壤温度为15,19,23,27和31℃,土壤湿度在吸水量0.1和1.5巴之间.其它环境因素维持在与自然环境相似的水平之中.试验结果表明:白云杉和臭椿茎和根生长的最适温度是19℃.班克松生长最适温度高达27℃.花旗松在15℃和27℃之间生长均良好.纸皮桦茎的生长在19℃和31℃之间均良好,最佳为31℃;而根的生长最佳为23℃.
The authors investigated the effects of soil temperature on the stem and root growth of three conifers and two broadleaf trees. All tree species tested were seed-seeded for two 8-week phases in a climate controlled room controlled by a thermostatic water bath method The soil moisture content was between 0.1 and 1.5 bar at 15, 19, 23, 27 and 31 ° C. Other environmental factors were maintained at similar levels to the natural environment.The results showed that: white spruce and Ailanthus altissima stem and root The optimum temperature for growth was 19 ° C. The optimum temperature for Bancakes growth was 27 ° C. Douglas fir grew well between 15 ° C. and 27 ° C. The growth of the stem of Birch bark was good between 19 ° C. and 31 ° C. , The best is 31 ℃; The best growth of root is 23 ℃.