Dissertations and Theses

Summary

In the last years, agriculture has undergone great transformations in technological terms, and one of the agricultural practices that is growing year by year is the adoption of irrigation. In this work it was evaluated how the soil temperature and humidity factors influence the spatio-temporal variation of CO2 emission by an oxisol. One hour after the first irrigation event, maximum leaf of 62 mm, it was observed that the CO2 emissions were positively affected by this blade, because the highest emissions were concentrated near the sprinkler, where also the lower temperatures and higher humidities were observed. ground. However, in a second irrigation event, maximum leaf of 44 mm, together with the occurrence of approximately 126 mm of natural rainfall, the highest emissions did not focus on the points closest to the sprinkler. During the study period, CO2 emissions showed a variation in the reverse direction to the soil temperature, with the exception of some points located in the vicinity of the sprinkler, which presented variations directly proportional to the CO2 emission, mainly in the last days studied. As for soil moisture, it has always been directly proportional to the CO2 emission.

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