松嫩草原典型群落植硅体碳汇

生态学杂志

松嫩草原典型群落植硅体碳汇

钟立祥¹,介冬梅^1,2,3,4*,李德晖^1,2,3,4,陈婕¹,陈雨芬¹,陈念康¹,巴合依拉·哈连¹

（¹东北师范大学地理科学学院，长春 130024；²长白山地理过程与生态安全教育部重点实验室，长春 130024；³东北师范大学泥炭沼泽研究所与国家环境保护湿地生态与植被恢复重点实验室，长春 130024；⁴植被生态科学教育部重点实验室，长春 130024）

发布日期:2020-06-10

Phytolith-occluded organic carbon sequestration of typical communities in Songnen grassland.

ZHONG Li-xiang¹, JIE Dong-mei^1,2,3,4*, LI De-hui^1,2,3,4, CHEN Jie¹, CHEN Yu-fen¹, CHEN Nian-kang¹, BAHAYILA Halian¹, WANG Fang¹

(¹School of Geographical Science, Northern Normal University, Changchun 130024, China; ²Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, Changchun 130024, China; ³Institute for Peat and Mire Research, State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Changchun 130024, China; ⁴Key Laboratory for Vegetation Ecology, Ministry of Education, Changchun 130024, China).

Published:2020-06-10

摘要/Abstract

摘要： 植硅体碳汇是草原碳汇的重要部分。本研究选取松嫩草原中禾本科群落、莎草科群落、菊科群落为对象，通过湿式灰化法提取植硅体，并通过碱溶分光光度法对植硅体碳量进行测定。根据植硅体含碳量估算了松嫩草原的植硅体碳封存速率，探讨了禾本科群落、莎草科群落、菊科群落植硅体碳封存能力的差异。结果表明：松嫩草原的植硅体碳封存速率为1.67 kg CO₂·hm^-2·a^-1。群落植硅体含碳量与植硅体含量之间有显著的负相关关系（P<0.05, R²=0.94）。不同群落植硅体碳封存能力存在显著的差异，群落植硅体碳封存速率分别为：莎草科群落（2.151 kg CO₂·hm^-2·a^-1）、禾本科群落（1.716 kg CO₂·hm^-2·a^-1）、菊科群落（1.218 kg CO₂·hm^-2·a^-1）。群落植硅体碳封存能力受到群落组成、地上净初级生产力、植硅体形成过程的影响。以上结果可为完善草原碳循环研究提供依据。

关键词: 资源, 代谢, 可持续发展

Abstract: Phytolith-occluded organic carbon (PhytOC) sink is an important component of grassland carbon sink. In this study, we extract phytoliths by Walkley-Black type, from Poaceae community, Asreraceae community and Cyperaceae community in Songnen grassland. PhytOC was measured by alkali dissolution spectrophotometry. PhytOC content of phytoliths, PhytOC content of biomass and phytolith content were calculated. We estimated the rate of PhytOC sequestration based on the amount of PhytOC in Songnen grassland and analyzed the differences in capacity of PhytOC sequestration among those three communities. The results showed that the average rate of PhytOC sequestration in Songnen grassland was 1.67 t CO₂·hm^-2·a^-1. There was a significant negative correlation between phytolith content and PhytOC content of phytoliths (P<0.05, R²=0.94). The capacity of PhytOC sequestration varied among different communities, with 2.151 kg CO₂·hm^-2·a^-1 for Cyperaceae community, 1.716 kg CO₂·hm^-2·a^-1 for Poaceae community, and 1.218 kg CO₂·hm^-2·a^-1 for Asreraceae community. PhytOC sequestration was affected by community composition, aboveground net primary productivity, and the formation processes of phytoliths. Our results could enrich the basis for studying grassland carbon cycling.

Key words: sustainable development., resource, metabolism

钟立祥,介冬梅,李德晖,陈婕,陈雨芬,陈念康,巴合依拉·哈连. 松嫩草原典型群落植硅体碳汇[J]. 生态学杂志.

ZHONG Li-xiang, JIE Dong-mei, LI De-hui, CHEN Jie, CHEN Yu-fen, CHEN Nian-kang, BAHAYILA Halian, WANG Fang. Phytolith-occluded organic carbon sequestration of typical communities in Songnen grassland.[J]. cje.

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