期刊论文

Kang, W.-X.

中文

生态学报

1000-0933

2009

29

5

2527-2534

10.3321/j.issn:1000-0933.2009.05.041

广州市林业局重点项目

本校为第一且通讯机构

在广泛收集资料和实验分析的基础上,研究了广州市各种农作物系统与大气CO_2交换.分析了各种农作物系统净生产力吸收CO_2的能力和碳汇功能大小.结果表明:2005年广州市8种农作物系统作物净生产力吸收CO_2 4 032 366t·a~(-1),其土壤CO_2排放3981753t·a~(-1),吸收大于排放,对大气CO_2而言,整个农作物系统是一个弱的碳汇;水稻、甘蔗、木薯和果用瓜4种连作或高杆作物系统每年作物净生产力吸收CO_2量大于土壤CO_2的排放量,系统具有较大的碳汇功能,花生、大豆、花卉和蔬菜4种矮杆作物系统每年作物净生产力吸收CO_2量小于土壤CO_2的排放量,系统起着碳源作用;果实或经济产量生长在地上部分的作物其单位面...

Base on broad collected data and experimental analysis, the carbon dioxide exchange between crop systems and atmosphere was studied in Guangzhou City. Both the CO2 absorb ability in all crop systems net productivity process and carbon sink function had been analyzed. Results showed that the CO2 absorb ability in the eight Crop systems net productivity process was 4 032 366t·a^-1 ; the amount of CO2 outlet in the soil was3981753t·a^-1 , less than the CO2 adsorb ability, so that the whole crop system was a weaker carbon sink process in the atmo...