【摘要】 通过测定杉木人工林群落的生物量和各组分的热值 ,探讨了该群落净初级生产的能量积累和分布 .结果表明 :该群落能量现存量为 175 5 3× 10 8～ 15 485× 10 8J/hm2 ;各组分或器官的热值含量变化范围为 17.3 6～ 2 1.0 4k J/g,其中以花果、凋落物和叶的能量含量较高 ,树干居中 ,而树皮、根、枝的能量含量较少 ;不同组分或器官的能量现存量差异较大 ,其大小顺序为树干 >根 >叶 >枝>凋落物 >地被物地上部分 >地被物地下部分 ;群落地上部分与地下部分能量的比值为 4∶ 1,垂直层次中能量分布按由大到小的顺序排列为乔木层 >根系层 >凋落物 >地被物 ;群落能量现存量的间伐损失量一般随抚育间伐强度的增大而增加 ,当抚育间伐强度小于 5 0 %时 ,损失量一般不超过能量现存量的 1/3更多还原

【Abstract】 The biomasses and caloric values of each component or organ of Chinese fir plantation communities were measured in order to discuss the energy storage and distribution of net primary production in the community. The results show as follows. The energy of standing crop is from 17 553×10 8 to 15 485×10 8 J/hm 2. Caloric values of different components or organs vary within a range of 17.36~21.04 kJ/g. The values rank in the series of blossom, cone, litter and needle on the top, trunk on the medium and bark, root and twig on the bottom. The energy of standing crop of different components varies greatly in the order of trunk>root>needle>twig>litter>aboveground undergrowth>undergrowth root and vertically in the order of arbor layer>root layer>litter layer>undergrowth layer. The ratio of energy of the above and underground parts is 4 to 1. And the energy loss of standing crop from tending thinning increases with thinning intensity but is less than 1/3 of the energy of standing crop when the intensity is lower than 50 per cent.更多还原