Losses of Co2 of the soil and time variability of the climatic conditions in the semiarid of Paraiba

The evaluation of CO2 was carried in five points in the field,with a monthly collection in the daylight (from 5:00 AM to 5:00PM) for twelve months. Cylinders had been installed for thecaptation of CO2 in randomized blocks. The meteorologicaldata were received from the digital station. The water cont...

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Bibliographic Details
Published inRa'e ga Vol. 13
Main Authors Kallianna Dantas Araujo, Alberício Pereira de Andrade, Roberto Wagner Cavalcanti Raposo, Paulo Roberto de Oliveira Rosa, Eduardo Pazera Júnior
Format Journal Article
LanguageEnglish
Published Universidade Federal do Paraná 01.06.2007
Subjects
Clima
Climate
CO2
semi-árido
semiarid
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Summary:The evaluation of CO2 was carried in five points in the field,with a monthly collection in the daylight (from 5:00 AM to 5:00PM) for twelve months. Cylinders had been installed for thecaptation of CO2 in randomized blocks. The meteorologicaldata were received from the digital station. The water contentof the soll was determined in a rectilinear greenhouse at105ºC. In the rainy season, when the solar radiation andtemperatures diminished, the tax of losses CO2 diminished.In the dry season, the tax of edaphic respiration increasedwith the water availability of the ground. The CO2 tax variedalong the day in function of the incidence of the solar radiationand the oscillations of the temperature. During the months ofbigger precipitation, the increase or the reduction of the CO2tax depended on the solar radiation. The CO2 production waslesser in October, June and July, because of the reduction ofthe solarimetric elements.
ISSN:1516-4136
2177-2738
DOI:10.5380/raega.v13i0.5556