分析重庆铁山坪46年(42~51年)生马尾松次生林的生物量、碳贮量及其空间分布特征。结果表明: 马尾松林生物量为142.06 t·hm-2,乔木层(89.91%)>灌木层(5.61%)>枯枝落叶层(2.98%)>草本层(1.50%); 马尾松林生态系统的总有机碳贮量为197.78 t·hm-2,乔木层为76.06 t·hm-2(38.45%),灌木层为3.55 t·hm-2(1.79%),草本层为0.88 t·hm-2(0.44%),现存凋落物层为2.34 t·hm-2(1.17%),土壤层为114.96 t·hm-2(58.13%); 马尾松各器官的碳贮量与其生物量成正比,树干的碳贮量最高,占乔木层碳贮量的75.06%; 马尾松林年净生物量增长量为9.01 t·hm-2a-1,年净固碳量为4.49 t·hm-2a-1,折合成CO2为16.46 t·hm-2a-1。
The biomass, carbon storage and spatial distribution of 46-old-years (42-old-years to 51-old-years) Pinus massoniana nature secondary forest were studied in Tieshanping of ChongQing. The results showed that the total biomass is 142.06 t·hm-2, the distributing sequence of the biomass of the forest ecosystem is: arbor layer(89.91%) > shrub layer(5.61%)>Standing litters(2.98%)> >herb(1.50%). The total organic carbon storage in forest ecosystem amounted to 197.78 t C·hm-2, of which trees layer stored 76.06 t C·hm-2 and accounted for 38.45%, shrub layer stored 3.55 t C·hm-2 and accounted for 1.79%, herb layer stored 0.88 t C·hm-2 and accounted to 0.44%, standing litters mass layer stored 2.34 t C·hm-2 and accounted to 1.17%, and soil stored 114.96 t C·hm-2 and accounted to 58.13%. The carbon storage in different organs was positively related to the biomass of corresponding organs. Stem accumulated the highest biomass, which also stored the highest carbon storage and comprised 75.06% of carbon storage in arbor layer. The annual net productivity of Pinus Massoniana trees was 9.01 t·hm-2a-1, and annual carbon storage was up to 4.49 t C·hm-2a-1, amounted CO2 to 16.46 t CO2·hm-2a-1.
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