CO2 exchange in natural pastures of the Pampa biome raising beef cattle under rotational management
DOI:
https://doi.org/10.5902/2179460X81293Keywords:
Flux tower, Carbon balance, Pampa biomeAbstract
The relationship between food production and the preservation of the environment has become a topic of international debate, mainly related to greenhouse gas emissions. In this way, it became increasingly important to know potential sources and sinks of these gases, mainly evaluating the carbon balance in the area of agriculture and livestock. In Rio Grande do Sul, agricultural activity is extremely important culturally and economically, occupying a large part of the state, mainly within the Pampa biome, which has large areas of natural pastures capable of serving as fodder for animals. In this work, we quantified the exchange of CO2 through the Eddy Covariance methodology in two experimental sites of native pasture of the Pampa biome used for cattle raising, in the rotating system, which aims to maintain the diversity of the native pasture. With one-year data we showed that both sites were CO2 sinks, ranging from -82,4 g C m-2 a-1 to -282,3 g C m-2 a-1, due to differences in environmental conditions and vegetation composition. Thus, raising cattle on the natural pasture of the pampa biome can contribute to offsetting greenhouse gas emissions in other agricultural sectors.
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