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对福建省东山县海岸带红壤性风积沙土木麻黄群落与均一性风积沙土木麻黄群落的生物量、生产力、各组分干重热值、去灰分热值及群落能量分布与结构特征进行了研究。结果表明 :红壤性风积沙土木麻黄群落的现存生物量和能量分别为 1 5 681 84g·m- 2 和 3 1 7795 3 1kJ·m- 2 ;均一性风积沙土木麻黄群落现存生物量和能量分别为 5 1 2 9 87g·m- 2 和 1 0 5 75 1 40kJ·m- 2 ;红壤性风积沙土的木麻黄群落各组分热值范围为 1 9 84～ 2 1 70kJ·g- 1 ,其中叶热值最高 ,根最低 ,各组分能量在群落中所占比例为 :干 ( 3 8 0 9% ) >枝 ( 1 9 48% ) >根( 1 7 0 9% ) >叶 ( 1 6 86% ) >皮 ( 6 83 % ) >枯枝 ( 0 88% ) >果 ( 0 77% ) ,凋落物的能量归还量为 90 70 47kJ·m- 2a- 1 ,2 0 0 2年群落能量的净固定量为 3 1 2 98 70kJ·m- 2 a- 1 ;均一性风积沙土木麻黄群落各组分热值在 1 9 98～2 1 3 9kJ·g- 1 ,其中枯枝的热值最高 ,根最低 ;各组分能量在群落中所占比例为 :干 ( 4 6 93 % ) >根 ( 1 6 44% ) >枝 ( 1 3 92 % ) >枯枝 ( 1 2 2 8% ) >皮 ( 5 87% ) >叶 ( 3 90 % ) >果 ( 0 66% ) ,凋落物的能量归还量为 2 0 61 77kJ·m- 2 a- 1 ,2 0 0 2年群落能量净固定量为 1 2 662 82kJ·m- 2 a- 1 ;在红
The biomass, productivity, caloric value of dry weight of each component, caloric value of ash removal and energy distribution and structure of community were studied in the community of Pinus elliottii and the homogenous aeolian community of Dongfeng County, Dongshan County, Fujian Province Study. The results showed that the existing biomass and energy of the Eupolyphaga officinalis community in red soil aeolian community were 15 681 84 g · m -2 and 31 7795 3 1 kJ · m -2, With energy of 5 1 2 9 87 g · m -2 and 1 0 5 75 1 40 kJ · m -2, respectively. The calorific values of each component of Casuarina equisetifolia in aeolian aeolian sandy soil ranged from 1 84- 2 1 70 kJ · g- 1, with the highest leaf caloric value and the lowest root. The energy proportion of each component in the community was: dry (389%)> branch (1,98%)> root (1790%)> leaf (16 68%), skin (6 83%), litter (0 88%), fruit (0 77%), and litterfall energy return 90 70 47 kJ · m -2 2a -1 2 0 0 2 The net fixed amount of annual community energy was 3 1 2 98 70 kJ · m-2 a-1. The calorific value of each component of the homogenous aeolian community was from 988 to 2139kJ · g -1, The caloric value of branches was the highest, and the lowest was in the branches. The energy proportion of each component in the community was dry (4693%)> roots (1644%)> branches (1392%)> 2 8%)> husk (577%)> leaf (90%)> fruit (0 66%), litter return energy was 2 0 61 77 kJ · m -2 The net fixed energy of community in a-1 and 2002 was 126682.8 kJ · m-2 a-1,