福建木兰溪源自然保护区米槠群落凋落物热值及能量归还动态  

Calorific Value and Energy-recycling of Litterfall in Castanopsis carlesii Community at Mulanxi Water Conservation Area in Fujian

作　　者：张建和 

机构地区：[1]福建省仙游县林业局,福建莆田351200

出　　处：《福建农业学报》2016年第2期194-198,共5页Fujian Journal of Agricultural Sciences

基　　金：福建省自然科学基金项目(B0110025)

摘　　要：对福建木兰溪源自然保护区米槠次生林群落的凋落物的热值、能量归还量动态进行分析。研究表明,2013-2014年米槠的热值平均值为20.02kJ·g-1,年内及年际间的波动均比较小,变异系数在0.74%-1.85%。米槠凋落物各组分热值大小顺序为：花〉枝〉叶〉果。2013年米槠群落年归还的总能量为145.5MJ·hm^-2,2014年米槠群落年归还的总能量为176.8 MJ·hm^-2,2013-2014年,米槠归还的能量占76.3%,其他树种占14.8%,杂物占8.9%,米槠叶、枝、花、果的能量归还量占米槠归还量能量的79.0%,20.6%、0.2%、0.2%。2013-2014年米槠群落归还的总能量随月份的变化呈显著的单峰曲线,峰值出现在每年的3-6月份,归还的能量占全年总归还量的80%左右。In 2013-2014,a monthly survey was conducted to determine the calorific value（CV）and energyrecycling on the fallen biomass in a secondary Castanopsis carlesii forest located in Mulanxi Water Conservation Area in Xianyou,Fujian.The average CV of the target trees was 20.02kJ·g-1,with slight annual and seasonal fluctuations,i.e.,the coefficients of variation were between 0.74%-1.85%.CVs of all litterfalls in the area were in the order of leaves〉twigs 〉flowers 〉nuts.The total energy-recycling was 145.5 MJ·hm^-2 in 2013,and176.8 MJ·hm^-2 in 2014.On average,76.3% of the recycled energy were contributed by C.carlesii,14.8% by other trees,and 8.9% by miscellaneous litters.In the C.carlesii community,79.0%,20.6%,0.2% and 0.2% of the recycled energies came from the fallen leaves,twigs,flowers,and nuts,respectively.In two years of this survey,the energy-recycling of the community peaked in March through June,contributing approximately 80% of the annual total.

关 键 词：米槠 次生林 凋落物 能量归还 动态 

分 类 号：Q948[生物学—植物学]