The Dynamics of Soil CO_2 Efflux and Its Controlled Factors in Maize Filed from Grain Filling to Mature Stage
Abstract：In this study,LI-8150 long-term chamber was used to monitor continuously soil CO2 efflux rate in spring maize farmland from the grain-filling to mature stage.The results were as follows： there was an obvious daily dynamic change of soil respiration in the maize farmland ecosystem under different kinds of weather condition,it was a single peak curve at the sunny and cloudy day,and the maximum was 4.43 μmol m2/s and 2.90 μmol m2/s,while it was a shocked curve at the rainy day,where the maximum was 2.48 μmol m2/s and the minimum was 0.41 μmol m2/s.On the other hand,soil respiration showed a continuous peaked curve day by day;it also showed a remarkable positive correlation with soil temperature and soil water content.Finally,equations were fitted among soil respiration,soil temperature and soil water content at three typical weather conditions and during experiment period,the relationships of which were significant.
Keywords：soil respirationdynamic changessoil temperaturesoil water contentspring maize
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)