| 绿竹生态系统植硅体碳积累与分布特征 |
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| 引用本文： | 杨杰,项婷婷,姜培坤,吴家森,柯和佳.绿竹生态系统植硅体碳积累与分布特征[J].浙江农林大学学报,2016,33(2):225-231. |
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| 作者姓名： | 杨杰 项婷婷 姜培坤 吴家森 柯和佳 |
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| 作者单位： | 1.浙江农林大学 环境与资源学院，浙江 临安 311300;2.浙江农林大学 浙江省森林生态系统碳循环与固碳减排重点实验室，浙江 临安 311300;3.浙江省苍南县林业局，浙江 苍南 325800 |
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| 基金项目： | 浙江省自然科学基金资助项目（LY13C160010）;国家自然科学基金资助项目（41471197）;浙江农林大学科研发展基金资助项目（2014FR052） |
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| 摘 要： | 植硅体封存的有机碳（phytolith-occluded organic carbon, PhytOC）已被证明在生物地球化学碳硅循环中具有重要的作用。为了解绿竹Dendrocalamopsis oldhami生态系统中植硅体碳的分布与积累特征，于2014年12月在中心产区浙江省苍南县利用标准地调查方法，采集了不同年龄（1～3年生）、不同器官（叶、枝、秆）、凋落物和土壤样品，分析了硅、植硅体、植硅体碳质量分数。结果表明:绿竹地上部分硅、植硅体、植硅体碳质量分数大小表现均表现为凋落物＞叶＞枝＞秆，其中植硅体碳的质量分数分别为4.28，3.16，0.28，0.04 gkg－1，植硅体碳总积累量为22.64 kghm－2，大小顺序为叶（13.22 kghm－2）＞凋落物（5.74 kghm－2）＞枝（2.71 kghm－2）＞秆（0.96 kghm－2）；林地土壤硅、植硅体、植硅体碳质量分数均随着土层厚度的增加而呈降低的趋势，0～100 cm土壤中植硅体碳储量为1 302.60 kghm－2。绿竹植株体内植硅体质量分数与硅、植硅体碳质量分数之间的相关性达极显著（P＜0.01）或显著（P＜0.05）水平，土壤植硅体碳质量分数与总有机碳质量分数之间也具有极显著（P＜0.01）相关性。图4表3参33
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| 关 键 词： | 森林生态学 绿竹 植硅体 植硅体碳 分布特征 |
| 收稿时间： | 2015-04-09 |
Phytolith-occluded organic carbon accumulation and distribution in a Dendrocalamopsis oldhami bamboo stand ecosystem |
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| YANG Jie,XIANG Tingting,JIANG Peikun,WU Jiasen,KE Hejia.Phytolith-occluded organic carbon accumulation and distribution in a Dendrocalamopsis oldhami bamboo stand ecosystem[J].Journal of Zhejiang A&F University,2016,33(2):225-231. |
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| Authors: | YANG Jie XIANG Tingting JIANG Peikun WU Jiasen KE Hejia |
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| Institution: | 1.School of Environmental and Resource Sciences, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;2.Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;3.Forest Enterprise of Cangnan County, Cangnan 325800, Zhejiang, China |
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| Abstract: | Phytolith-occluded organic carbon （PhytOC） has been shown to have an important role in carbon-silicon biogeochemical cycling. To understand the characteristics of PhytOC accumulation, different organs （leaf, branch, and culm）, litter, and soil samples were collected in different age stands of 1－3 year old Dendrocalamopsis oldhami bamboo ecosystems from Cangnan County, Zhejiang Province in December 2014. Then, silicon, phytoliths, and PhytOC were analyzed with a correlation analysis. Results of silicon, phytoliths, and PhytOC mass fraction showed that PhytOC content （in gkg－1） of aboveground litter was （4.28）＞leaf （3.16）＞branch （0.28）＞stalk （0.04）. The total accumulation of PhytOC was 22.64 kghm－2 with an order （in kghm－2） of leaf （13.22）＞litter （5.74）＞branch （2.71）＞stalk （0.96）. Also, reserve stocks of PhytOC were 1 302.60 kghm－2 in the 0－100 cm soil depth. A highly significant correlation （P＜0.01, R2=0.96） was found between silicon and phytolith concentration; a significant correlation （P＜0.05, R2= 0.62） was revealed for phytolith and PhytOC concentration in plants; and a highly significant correlation （P＜0.01, R2= 0.80） was shown with PhytOC and total organic carbon in soils. This results shows that the content of PhytOC depend on silicon and phytolith in plants, and related to total organic carbon in soils. ［Ch, 4 fig. 3 tab. 33 ref.］ |
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