广州市海珠区万亩果园主要生态系统的碳密度及其分配特征

发布时间：2018-01-02 22:05

本文关键词：广州市海珠区万亩果园主要生态系统的碳密度及其分配特征　出处：《生态学杂志》2016年01期 　论文类型：期刊论文

【摘要】：本文选取了广州市海珠区万亩果园的木本生态系统(果园复合湿地、果园和绿地)、草本生态系统(农田)和水生生态系统(河涌)为对象,研究了土壤与植被的碳密度。结果表明:果园复合湿地、果园、河涌、农田和绿地生态系统碳密度为137.12~204.25t·hm~(-2),其土壤碳密度为98.45~196.44 t·hm~(-2),河涌生态系统的底泥碳密度显著高于其他4种陆地生态系统的土壤碳密度(P0.05);果园复合湿地(73.65 t·hm~(-2))和果园(61.90t·hm~(-2))的植被碳密度显著高于绿地(36.69 t·hm~(-2))与农田(4.15 t·hm-2)(P0.05);果园复合湿地、果园和绿地生态系统的植被和土壤碳分配比例为40%~45%和55%~60%,农田生态系统中95.01%的碳分配在土壤层,河涌生态系统的碳99.96%分配在底泥中;在广州城市区域中,以果树植被为主并具有较大湿地面积的万亩果园具有较高的碳密度和碳汇水平。
[Abstract]:This paper selects the woody ecosystem of Guangzhou City, Haizhuqu District million mu of orchard (orchard composite wetland, orchard and green), herbaceous ecosystems (farmland) and aquatic ecosystems (He Yong) as the research object, the soil and vegetation carbon density. The results show that the composite wet orchards, farmland and orchard, He Yong, green ecological the carbon density of 137.12~204.25t - hm~ (-2), the soil carbon density of 98.45~196.44 t hm~ (-2), soil carbon density of sediment He Yong ecosystem carbon density was significantly higher than the other 4 species of terrestrial ecosystems (P0.05); orchard composite wetland (73.65 t hm~ (-2) (61.90t) and orchard hm~ (-2)) the vegetation carbon density was significantly higher than that of green (36.69 T - hm~ (-2)) and farmland (4.15 t hm-2) (P0.05); composite orchard wetland, vegetation and soil carbon distribution proportion of orchard and green ecological system for 40%~45% and 55%~60%, the 95.01% carbon distribution in farmland ecosystem In the soil layer, river ecosystem carbon distribution in sediment in 99.96%; in Guangzhou City area, with fruit vegetation and has large wetland acres of orchards with higher carbon density and carbon sequestration.

【作者单位】：中山大学环境科学与工程学院;广东省环境污染控制与修复技术重点实验室中山大学;广州市海珠区环境监测站;
【基金】：国家自然科学基金项目(40971054) 广州市海珠区科技和信息化局软科学研究项目(2012-RY-01)资助
【分类号】：S66;S181
【正文快照】： 农业生态系统是陆地生态系统的重要组成部分,也是全球植被最主要的碳库。果园生态系统属于木本类农业生态系统,与作物型农业系统一样具有种植密度高与量产化等特点,是重要的土地利用类型之一(王义祥等,2010)。有研究指出,与一年生的作物型农业系统相比,多年生的果园型生态系统

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