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《Guizhou Science》 2002-02
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A preliminary research on CO_2 release in subtropical karst forest soil

RAN Jing-cheng 1, HE Shi-yi 2,CAO Jian-hua 2,XIONG Zhi-bing 1(1. The Administration of Maolan National Nature Reserve in Guizhou, Libo, Guizhou 558400, China; 2. Karst Dynamics Laboratory, Guilin, Guangxi 541004, China)  
An absorb trap way was used to study the trends of CO 2 release in subtropical forest soil, based on the data of located observaiton in Maolan National Nature Reserve, Guizhou Province, China. The following aspects were investigated: the release of CO 2 was low in spring and winter, but high in summer and autumn. The release of CO 2 in spring was from 27.1 149mg.m -2.h -1 to 94.9 022 mg.m -2.h -1, with an average 0865.5 277mg.m -2.h -1. In summer it was from 127.6 942 mg.m -2.h -1 to 446.5 894mg.m -2.h -1, with an average 08 281.7 385 mg.m -2.h -1. In autumn it was from 0 to 657.0 716 mg.m -2.h -1, average 08 339.6 792mg.m -2.h -1. In winter it was from 71.5 163 mg.m -2.h -1 to 595.8 761mg.m -2.h -1, with an average 08 206.5 868 mg.m -2.h -1. The annual average was 1.9 568 kg.m -2.yr -1. The highest point was from 14 to 18 pm. and the lowest point was from 18 to 22 pm. in spring. And the highest point was from 19 to 23 pm. and lowest point was from 3 to 7 am.in autum. The day release was more than night in spring and summer, and vice versa in autumn and winter.
【Fund】: 国土资源部溶动力学开放研究实验室资助项目
【CateGory Index】: S153.6
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