2022年总目录

伴随全球气候变化关注度提升，植物碳汇研究愈发得以重视，其中陆生灌丛植物在陆地生态系统碳汇研究中占据重要位置。采用样地调查法，对滇中地区不同样地的69个样方中12个主要灌丛生态系统生物量与有机碳密度的相关关系、分配格局、形成原因进行了研究。结果表明，灌丛的地上生物量（AGB）、地下生物量（UGB）和根冠比（R/S）分别介于1.13~2.03、0.62~1.49 t/hm²和0.38~0.84。群落和物种的地上、地下生物量的拟合斜率为异速分配生长关系，植被的根冠比数值较其他植被类型更小。灌丛碳密度、凋落物总碳密度、土壤有机碳密度和生态系统碳密度的均值分别为(60.43±22.12)、(25.60±7.32)、(24.71±20.06)t/hm²和(110.74±35.34)t/hm²。灌木层碳在根茎叶间分布含量差别不大，主要在茎部（35.57%），草本层碳主要分配在地下部分中(15.06%~60.45%)。年均温度（MAT）和年均降水（MAP）对生物量及根冠比的相关性没有影响。

Characteristics of Carbon Sink Distribution Pattern of Terrestrial Main Shrub Ecosystem in Central Yunnan

With the increasing concern to the global climate change,more and more attention has been paid to the researches on plant carbon sink,in which terrestrial shrub plants occupy an important position in the study of terrestrial ecosystem carbon sink.In this research,the correlation between biomass and organic carbon density,distribution pattern and formation causes of 12 main shrub ecosystems in 69 sampling points in different places in Central Yunnan were studied by sample plot investigation method.The results showed that the aboveground biomass (AGB),underground biomass (UGB) and root shoot ratio (R/S) of shrub were between 1.13-2.03 t/hm²,0.62-1.49 t/hm² and 0.38-0.84,respectively.The fitting slope of AGB and UGB between community and species was allometric growth,and the R/S of vegetation was smaller than that of other vegetation types.The mean values of shrub carbon density,total litter carbon density,soil organic carbon density and ecosystem carbon density were 60.43±22.12,25.60±7.32,24.7±20.06,and 110.74±35.34 t/hm²,respectively.There was little differences in the distribution and content of carbon in shrub layer between roots,stems and leaves,and it was mainly in stems (35.57%).The herbaceous carbon was mainly distributed in the underground part (15.06%-60.45%).Mean annual temperature and mean annual precipitation had no effect on the correlation between biomass and R/S.