Abstract: Aimed to explore the change patterns of the gross caloric value (GCV) of dominant plant species in Xishuangbanna tropical seasonal rainforest, the GCV of different organs of 37 dominant species in different layers of the forest was measured by SDACM-Ⅲa caloric value analyzer in dry and rainy seasons, respect
ively. The mean GCV of the 37 dominant species was 17.05-20.23 kJ·g^-1, and the GCV of trees, lianes, shrubs, and herbages was 18.86-20.23, 17.97-19.76, 17.71-18.83, and 17.05-17.45 kJ·g^-1, respectively. The mean GCV of the dominant species in different layers in both dry and rainy seasons decreased in the
 order of tree layer>liane interlayer>shrub layer>herbage layer. For the dominant species at the same layers, the mean GCV of their organs did not display signi
ficant differences, except for the GCV between leaves and roots or branches. No significant differences in the mean GCV of the same species in different layers were observed between dry and rainy seasons. Also, there were no significant differences in the mean GCV of the dominant species in the same layers in dry and rainy seasons.

Key words: Green food, Rice, Soil, Lead, Accumulation and translocation