【阳性树种】在较强的光照下才生育健壮的植物，如松、麻栋、栓皮栋、柳、杨、棒、槐等树种。阳性树种自然整枝良好，枝叶稀疏，透光，枝下高长（即干基到树冠下部第一轮枝的距离），树皮通常较厚，叶色较淡，植株开花结实力较大。一般生长较快，寿命较短，呼吸作用速度高，因而补偿点较高。
... 阳性情感转移 positive transference; 阳性树种 heliophilous species; 阳性元素 positive element; ...
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Acacia. is typically heliophilous species, with a short growth circle. Its root nodule can improve the soil conditions and soil fertility with a great economic, social and ecological benefit.
相思类树种是典型的强阳性树种，生长迅速，具根瘤，可改良土壤，提高土壤肥力，具有较大的经济、生态和社会效益。
参考来源 - 几个相思类树种优良根瘤菌菌株的筛选及评价·2,447,543篇论文数据，部分数据来源于NoteExpress
在持续的高光下，兩种桧木小苗的光合作用效率和葉相对生长率都被明xii显的抑制，显示红桧和扁柏小苗都非极端阳性树种。
However, continued high light reduces the photosynthesis and leaf growth of either species significantly. The seedlings of either two species are not extremely sun-acclimated.
灌木层中乔木树种和阳性乔灌木种类比例、相对密度和重要值均随坡位梯度从下部到上部逐渐增大。
Percentage, relative density and importance values of tree species and intolerant tree and shrub species increased while slope gradient from lower to upper.
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