Abstract:

This article studied the carbon sink function of Rice-crop ecosystem in Guangzhou City based on experiments, according to spot observation data and related data with Rice-crop system in Guangzhou City. Results showed that: the CO2 absorb ability in Rice-crop System in Guangzhou City during 2005 net productivity process was 1621649t?a-1;the amount of CO2 emission in the soil was 1168625t?a-1,less than the CO2 absorb ability; the amount of CO2 net absorption was 453024t?a-1, the Rice-crop ecosystem in Guangzhou City had carbon sink function, was5.58t?hm-2 a-1 , and it was a weaker carbon sink process in the atmosphere.