摘要
在生物量、生产力研究基础上，对武夷山甜槠（Ｃａｓｔａｎｏｐｓｉｓ ｅｙｒｅｉ（Ｃｈａｍ ｐ．ｅｘ Ｂｅｎｔｈ．） Ｔｕｔｃｈ．）群落各组分的热值、群落能量现存量、能量年净固定量以及太阳能转化效率进行了研究。结果表明：（１）甜槠群落各组分样品的干重热值具有一定的差异，树皮热值最高，细根热值最低。（２）甜槠群落的能量现存量达７８０５８４．１ ｋＪ·ｍ － ２，其中地上部分为６７８９１３．８ ｋＪ·ｍ － ２，占总量的８６．９８％ ；地下部分为１０１６７０．３ ｋＪ·ｍ － ２，占１３．０２％ 。（３）甜槠群落的能量年净固定量（１９９２年）为２６８５６．２ ｋＪ·ｍ － ２·ａ－ １，林地太阳光合有效辐射能的转化效率为１．２９６％ 。
Based on the measurement of biomass and productivity,the caloric value of plant samples,the standing crop of energy,net energy production and energy conversing efficiency of Castanopsis eyrei community were determined.There were some differences in caloric values among the fractions of C.eyrei community being highest in that of bark and lowest in that of the microroots.The standing crop of energy in C.eyrei community was 780584.1 kJ·m -2 ,in which the standing crop of energy accumulated in the aboveground biomass was 678913.8 kJ·m -2 ,accounting 86.98% of the total;that of underground was 101670.3 kJ·m -2 ,i.e.13.02%.Net energy production was 26856.2 kJ·m -2 ·a -1 for this community in 1992.To the photosynthetic active radiation on the stand,the energy conversing efficiency was 1.296%.
基金
福建省自然科学基金
关键词
植物
甜槠
群落
热值
能量
武夷山
Castanopsis eyrei community
Caloric value
Energy
Wuyi mountains
