毛竹林生态系统植硅体的分布及其影响因素
Phytolith distribution and carbon sequestration in China with Phyllostachys edulis

李蓓蕾 ¹ 宋照亮 ² ^* 姜培坤 ³ 周国模 ³ 李自民 ⁴

文摘	在浙江省临安市青山、安吉县船坝、新昌县巧英和新昌县大市聚等4个地点选取毛竹Phyllostachys edulis竹叶及林地土壤,运用微波消解及Walkley-Black方法,研究不同岩性土壤上发育的同一竹龄毛竹竹叶和同一岩性土壤上发育的不同竹龄毛竹竹叶中植硅体的产生和分布规律,为毛竹林植硅体碳汇调控提供科学参考。结果表明:①毛竹竹叶中植硅体质量分数为50.8~99.1 g·kg~(-1),基本上是由上部到下部递减,在不同岩性间的差异表现为花岗岩>花岗闪长岩>玄武岩>页岩。②毛竹竹叶中植硅体的产生通量变化范围为154.9~605.9 kg·hm~(-2) ·a~(-1),在不同岩性间的差异表现为花岗岩>花岗闪长岩>玄武岩>页岩。③若按目前全国毛竹林面积3.3×10~6 hm~2,植硅体产生通量209.5~420.2 kg·hm~(-2)·a~(-1)以及植硅体中碳含量(3±1)%计算,那么中国毛竹林通过叶植硅体约可以固定二氧化碳(76.1~152.5)×10~6 kg·a~(-1)。
其他语种文摘	Phytoliths, the opals of amorphous silica, are deposited in the cell wall, cell lumen, and intercellular spaces during the growth of plants, especially gramineous plants. To provide references for regulation of phytolith carbon sinks, the phytolith distribution in Phyllostachys edulis bamboo from Qingshan, Chuanba, Qiaoying, and Dashiju in Zhejiang Province, with different ages on the same lithology and with the same age on different lithologies (granite, granodiorite, basalt, and shale) was studied by sampling surface soils (500.0 g for each sample)and bamboo leaves (150.0 g for each sample) with three replicates and using the phytolith extraction method of microwave and Walkley-Black digestion. Results showed that the range of phytolith content in Phyllostachys edulis was 50.8-99.1 g·kg~(-1) and decreased from top to bottom of the leaf; it also decreased in the order: granite > granodiorite > basalt > shale. The phytolith production flux in Ph. edulis for different lithologies was 154.9-605.9 kg·hm~(-2)·a~(-1) and decreased in the following order: granite > granodiorite > basalt > shale. Assuming a phytolith production flux in Ph. edulis of 209.5-420.2 kg·hm~(-2)·a~(-1), the potential phytolith production rate in China was estimated to be 0.7-1.4 Tg·a~(-1). Thus, using the current distribution area of Ph. edulis in China (3.3 ×10~6 hm~2) and the PhytOC content in phytoliths (3±1)%, (76.1-152.5)×10~6 kg·a~(-1) CO_2 could be sequestered from phytoliths.
来源	浙江农林大学学报 ,2014,31(4):547-553 【扩展库】
关键词	森林生态学 ; 毛竹 ; 岩性 ; 竹龄 ; 植硅体 ; 碳汇
地址	1. 浙江农林大学环境与资源学院, 浙江, 临安, 311300 2. 浙江农林大学环境与资源学院, 浙江省森林生态系统碳循环与固碳减排重点实验室;;环境地球化学国家重点实验室, 浙江, 临安, 311300 3. 浙江农林大学环境与资源学院, 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 4. 浙江农林大学环境与资源学院, 农业部茶树生物学与资源利用重点实验室, 浙江, 临安, 311300
语种	中文
文献类型	研究性论文
ISSN	2095-0756
学科	林业
基金	中国科学院地球化学研究所领域前沿项目子课题 ; 国家自然科学基金资助项目 ; 浙江农林大学研究生创新基金
文献收藏号	CSCD:5203543