广西钦州湾红树林碳储量与分配特征

Carbon storage and distribution of mangroves at Qinzhou bay

以广西钦州湾沿海红树林区域内的3种乡土红树植物及底泥为研究对象,采用野外现场调查分析和实验室测定相结合的方法,研究了红树林的生物量、碳贮量及其分配特征。结果表明:(1)不同红树植物的生物量回归方程不同,秋茄、桐花树和白骨壤的总生物量方程表达式分别为W_t=a+bD^2、W_t=a+bDBH、W_t=a+bD^2H,且这些生物量回归方程均达到极显著水平(P<0.01);(2)秋茄、桐花树和白骨壤全植株的含碳比率差异不明显,分别为0.448、0.440、0.428,但不同红树植物不同组分的含碳比率存在一定差异,如树根、树干、树枝、树叶等指标;(3)红树植物碳储量的大小顺序为桐花树(33.88 t/hm^2)>白骨壤(10.36 t/hm^2)>秋茄(3.72 t/hm^2),各组分的碳储量为树干>树根>多年生枝>树桩>树叶>幼枝>花果,地下与地上碳储量之比分别为0.27、0.22和0.42;(4)桐花树、白骨壤、秋茄3种红树林湿地的总碳储量分别为79.14、62.09、43.49 t/hm^2,其中红树林土壤碳储量高于红树植物。

Using the mangrove plants and sediment of the typical mangrove areas at Qinzhou Bay in Guangxi Zhuang autonomous region as research object, the biomass, carbon storage and spatial distribution were studied by the combination of wild field analysis and laboratory testing methods. The results showed that： （1） The biomass equations of different mangrove plants were different in Guangxi province, optimal bionmass equations of Kandelia candel,Avicennia marina and Aegiceras coriculatum were Wt=a＋bD2, Wt=a＋bDBH and Wt=a＋bD2H which reached extremely, significant level （P 〈 0.01）. （2）Total carbon content rates of K. candel, .4. marina and 4. corniculatum were 0.448, 0.440, 0.428, there were no significant difference, but carbon content rates of some different components including roots, trunks, branches and leaves of 3 mangrove species were significant difference. （3） Carbon storage of three mangrove plants were in the order ofA. corniculatum （33.88 t/hm2） 〉 A. marina（lO.36 t/hm2） 〉 K. candel （3.72 t/hm2）, its distribution pattern was in the order of trunk 〉 root 〉 branch 〉 stump 〉 leaf 〉 sprout 〉 fruit, and carbon storage ratio of underground/aboveground was 0.27, 0.22 and 0.42. （4） Carbon storage of A. corniculatum, A. marina and K. candel mangrove wetland was79.14 t/hm2, 62.09 t/hm2, 43.49 t/hm2 respectively, and carbon storage of soil was more than that of mangrove plant.