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为研究不同生态型竹种生态系统中植硅体碳的分布和积累特征,论文选取了浙江省境内发育于同一土壤类型的3种竹林生态系统,分别采集其不同年龄的地上部分(叶、枝、秆)和现存凋落物以及不同深度的土样,分析各样品的植硅体含量、植硅体碳含量和硅含量。结果表明:1)3种不同生态型竹种器官中植硅体和植硅体碳积累和分布特征均为叶>枝>秆,土壤中植硅体和植硅体碳储量达到最大,且随土层深度增加植硅体碳储量有增加趋势;2)通过3种竹种植硅体碳储量比较,散生竹高节竹生态系统植硅体储量最高,丛生竹绿竹和混生竹茶秆竹植硅体碳储量相近;3)根据3种竹种在全国的分布面积估算,茶秆竹生态系统总固碳能力略大于绿竹,而远远高于高节竹。
In order to study the distribution and accumulation of phytolith carbon in different ecotypes of bamboo ecosystem, three bamboo forest ecosystems developed in the same soil type in Zhejiang Province were selected, and the aboveground parts (leaves and branches , Stalks) and existing litter and soil samples at different depths. The content of phytoliths, phytolith carbon content and silicon content in each sample were analyzed. The results showed that: 1) The carbon accumulation and distribution of phytoliths and phytoliths in three different ecotypes of bamboo species were leaf> shoot> stalk, and the contents of phytoliths and phytoliths reached the maximum The carbon storage of phytolith increased with the increase of soil depth; 2) Compared with the carbon storage of the three kinds of bamboo, the reserves of phytoliths were the highest, 3) According to the distribution of three kinds of bamboo species in the country, the total carbon sequestration ability of tea straw ecosystem is slightly larger than that of green bamboo, which is much higher than that of high bamboo.