Seasonal control of CO2 exchange and N2O emissions in different agro ecosystems

Cropland ecosystems cover approximately 45% of Europe, and thus play an important role in the overall Greenhouse gases (GHGs) budget of the continent. However, the estimation of their emissions remains uncertain due to the diversity of environment and climatic indices, crops together with the strong influence of human management. Based on the continuous observation of soil-plant respiration and environmental factors in a several crops ecosystem from early June to early July in 2011, the spatial and temporal variation of soil-plant respiration and their controlling factors was analyzed. A survey was conducted to identify important criteria, and several crop fields were introduced which represent different value systems by varying criteria importance. Here we present data describing the relationships between net ecosystem exchange of carbon and climate/environment abiotic factors as measured using the static chamber method at field spatial scale. The approach is based on the local measurement and comparing the impact of environment physical indices on agro ecosystems productivity at crop habitat scale. The study was conducted in intensive grassland, barely, winter wheat and maize ecosystems at conventional farm (Kalvarija distr., 54o28′ N, 23o38′ E). The data have been collected in a real time using digital sensors of the humidity, pressure, gas concentration, solar intensity, wind speed and temperature. All the dependencies of the various physical data were valuated according to the plant growth. Data were obtained both in productive grasslands (manure and chemical fertilizing) and in various crop fields of different geographical location. The picked data set should be used when analysing ecological drivers on the fluctuation of the climate. Measurement of properties that affect fluid storage and transport, such as macro porosity, provided soil quality indices that helped in recommending suitable soil management systemsVytauto Didžiojo universitetasŽemės ūkio akademij