Abstract: In this paper, the calorific value and nutrient concentration of most phytofuel species in Hong Kong and Guangdong Province are determined and their quality as fuel is assessed.The calorific value of woody species ranges from 17.13 to 23.51 kJ·g^-1 , while that of herbaceous species ranges from 15.13 to 21.47 kJ·g^-1 . The species commonly used for domestic fuel in Guangdong and Hong Kong have a calorific value of over 20 kJ·g^-1 . Species with lower Nconcentration are more suitable for fuel, because less Nis removed from upland ecosystems and less NO_x is emitted to the atmosphere. Woody species have a Nconcentration of 4.67～10.90 mg·g^-1 , whereas herbaceous species, 3.55～14.59 mg·g^-1 . Pand Kricher species are less desirable fuels, since more nutrients are removed from hillsides. The Pconcentration varies from 0.17 to 1.05 mg·g^-1 , and K, from 3.98 to 23.00 mg·g^-1 . Woody species are not significantly different from herbaceous ones in calorific value and nutrient concentration.

Key words: Calorific value, Nutrient concentration, Phytofuel, industrial structure ecologization, decision making trial and evaluation laboratory (DEMATEL), production mode ecologization, marine industrial ecologization, technological innovation ecologization, industrial organization ecologization