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本文探讨福建和溪亚热带雨林各层主要优势植物种成熟叶的热值含量及其变化规律。结果表明：该雨林一年中主要树种叶片热值的含量范围：乔木层红栲、乌来栲、红鳞蒲桃、厚壳桂和茜草树分别为１９．９４～２１．１８、２０．３４～２１．３３、１９．９８～２１．０４、２１．９９～２３．２１和１９．１７～２１．０８ｋＪ／ｇ；灌木层罗伞树、九节木、柏拉木、斜基粗叶木、走马胎和草珊瑚分别为１８．４５～２０．２０、１９．１８～２０．０４、１７．３６～１８．４７、１７．１４～１８．１７、１７．１１～１８．４４和１９．５０～２０．１４ｋＪ／ｇ；草本层福建莲座蕨和单叶新月蕨分别为１８．２２～１８．９８和１５．１１～１６．７５ｋＪ／ｇ；层间植物花皮胶藤、密花豆藤和扁担藤分别为１０．７３～２２．５７、１９．４３～２１．１１和１８．８７～２０．３７ｋＪ／ｇ。各层叶热值含量大小为乔木层＞灌木层＞草本层。层间植物大藤本由于能达林冠利用充足阳光也具较高热值；同时含有乳汁、挥发性芳香油类等的植物热值较高。落叶的热值均高于各层成熟鲜叶的平均热值。
This article explored the caloric value and its variation of mature leaves of the main dominant species in Fujian Hexi Subtropical Rainforest. The results showed that the leaf caloric values of the main tree species in the rainforest ranged from 19.94 to 21.18 and from 23.4 to 21.4 ~ 21.33, 19.98 ~ 21.04, 21.99 ~ 23.21 and 19.17 ~ 21.08 kJ / g, respectively. Take the horse and grass coral were 18.45 ~ 20.20,19.18 ~ 20.04,17.36 ~ 18.47,17.14 ~ 18.17,17.11 ~ 18.44 and 19.50 ~ 20.14kJ / g, respectively. The herb layers of Fujian fern and single leaf crescent fern were 18.22 ~ 18.98 and 15.11 ~ 16.75kJ / g, Prunus humilis were 10.73 ~ 22.57,19.43 ~ 21.11 and 18.87 ~ 20.37kJ / g respectively. Leaf caloric value of each layer is the size of the tree layer> shrub layer> herb layer. Large plants of interpland plants can use high sunshine due to their ability to reach the canopy. Higher calorific value of plants such as milk and volatile aromatic oils are higher at the same time. The calorific value of deciduous leaves were higher than the average calorific value of mature fresh leaves of each layer.