福建武夷山2个典型植物群落建群种的热值研究

研究了福建武夷山自然保护区2个典型植物群落一甜槠群落(Castanopsis eyrei community)和黄山松群落(Pinus taiwanensis community)建群种的热值和灰分含量,以及凋落物热值的季节变化.结果表明:(1)2个建群种甜槠和黄山松各器官的灰分含量、干重热值和去灰分热值因种而异,同种植物不同器官之间灰分含量和热值存在差异.甜槠各器官灰分含量在0.69%～4.09%之间,干重热值在17.06～20.28kJ/g之间,去灰分热值在17.46～21.00kJ/g 之间;黄山松各器官灰分含量在0.58%～3.14%之间,干重热值在16.27～22.14kJ/g之间,去灰分热值在16.60～22.58kJ/g之间.(2)甜槠和黄山松凋落物热值的季节变化存在差异.(3)林地残留物的干重热值与年凋落物的干重热值相比,呈现了下降的趋势.

CALORIC VALUES OF TWO EDIFICATORS IN THE TYPICAL PLANT COMMUNITIES IN WUYI MOUNTAINS, FUJIAN

This paper deals with the caloric values of the two edificators in the typical plant communities (Castanopsis eyrei community and Pinus taiwanensis community) and the caloric values changed with seasonal litter leaves of Castanopsis eyrei or Pinus taiwanensi in Wuyi mountains, Fujian. The results were shown as follows: (l)Ash contents, the gross caloric values and the ash free caloric values of various organs were different between Castanopsis eyrei and Pinus taiwanensis. For the same species, the gross caloric values altered greatly, resulting from the ash contents of various organs. Ash contents, gross caloric values and ash free caloric values of various organs were from 0. 69% to 4. 09%, from 17. 06 to 20. 28kJ/g, from 17. 46 to 21. 00kJ/g for Castanopsis eyrei, and from 0. 58% to 3. 14%, from 16. 27 to 22. 14kJ/g, from 16. 60 to 22. 58kJ/g for Pinus taiwanensis, respectively. (2)The gross caloric values and ash free caloric values of leaf litter of Castanopsis eyrei or Pinus taiwanensis were changed with seasons. (3)The gross caloric values and ash free caloric values of residuals in the floor were lower than those of litter falls, respectively.