���ö�����Զ���¼�ǶԹ���Ū��������Ȫ�޽���ʱ��ˮ��ѧ��̬�仯������, ˮ��CO₂ ��ѹ���¶ȺͰ�������ˮ״��������Ȫˮˮ��ѧ��̬�仯����Ҫ���ء����±仯�����꼰̫���������ҹ����, Ӱ����ֲ���������ǿ����ʪ��Ȫˮ����ʴǿ�����Դ��ڸɼ�, ����Ϊ����ʯ����ָ�� ( SIC ) �Ͱ���ʯ����ָ��( SID ) �ϸߡ���ʪ���޽�������������, �¶ȶ�ֲ������Ҫ�������á�

Through the research on Landiantang spring in Guangxi, the authors monitored and analyzed hydro-chemical variations during non-rainfall term, and suggested that the carbon dioxide partial pressure in spring water, temperature and aquifer condition play the key roles in controlling daily geochemical variation of epi-karst spring water. Moreover, insolation strength, rainfall amount and solar radiation affected the vegetation activity. More erosion effectiveness occurred in wetmonths presented by the high value of SIC and SID than in dry season. The temperature controlled the vegetation productivity both in dry and wet seasonswithout precipitation.