福建和溪亚热带雨林凋落物能流的研究

The StUdy on Energy Flow Through Litter in the Subtropical Rain Forest in Hexi,Fujian Province

应用热值测定，研究了福建南靖县和溪亚热带雨林凋落物的能流特性，结果表明：在凋落物各组分中，其干重热值介于２０．３５ｋＪ／ｇ至２１，６９ｋＪ／ｇ之间，去灰分热值介于２０．９３ｋＪ／ｇ至２２．６４ｋＪ／ｇ之间；其中以落花热值最高，落果热值最低．落叶热值在５月最高，其干重热值达２２．０７ｋＪ／ｇ，１０月最低，为２１．００ｋＪ／ｇ．１９８７年凋落物的能流量为１６８１１ｋＪ／ｍ￣２，其中落叶占总凋落物的能流的６８．７７％；凋落物的年能量转化效率较高，达０．８１％；

The paper deals with the energy flow through litter in the subtropical rainforest in Hexi of Nanjing County,Fujian Province. The caloric value of various litter fractionsrange from 20.35kJ/g to 21.69kJ/g for gross caloric value,and 20.93kJ/g to 22. 64 kJ/g forash一free caloric value,with the highest value for flower,and the lowest for fruit.The caloricvalue of leaf was the highest in May (22.07kJ/g for GCV),and the lowest in October (21.00kJ/g for GCV).The total energy flow through litter in 1987 was 16 811kJ/m￣2 of which leavesaccounted for 66.77%. The annual efficiency of the conversion of solar radiation into litter faillingwas high,up to 0.81%.