DISCUSSION
The element of greatest interest in this study is organic carbon, a component of the soil organic substance consisting essentially of carbon present in organic compounds, including carbon in molecules such as carbohydrates, proteins, lipids and nucleic acids. These residues undergo processes of decomposition, fermentation and transformation operated by living organisms present in the soil. The decrease in the organic component in the control sample clearly suggests that this substance was metabolized by the bacterial component of the soil with the production of CO2 as a catabolite. On the contrary, both the field sample and the laboratory sample treated with the CO2Fixator show an increase in the organic carbon component. The data obtained with the specific sensor for CO2 "SCD30" clearly indicate that the concentration of CO2 (expressed in ppm, parts per million) in the control sample is higher than that of the treated samples. It is observed that, while the control sample emits CO2 discontinuously and in high quantities compared to the treated samples that emit CO2 continuously and in significantly lower quantities. In the graph of gains/losses of substances expressed as a percentage compared to the initial state, organic carbon increases significantly in the samples treated with the CO2Fixator. The development of new seedlings was observed in the control and in the sample, in the control the development of new seedlings did not affect the compensation of CO2 emissions from the soil, indicating that the rate of decomposition of the organic component of the soil exceeds the activity of CO2 fixation by the new organic substance. On the contrary, in the treated sample the development of new seedlings adds and fixes more CO2. The laboratory data provide us with clear indications of the effects of the CO2Fixator also in other aspects. An increase in the cation exchange capacity is recorded in the treated sample, which allows the retention of essential nutrients that can be released to the plants when necessary. It is also an indication of a greater soil structure with water retention capacity, while in the untreated sample a reduction of the same is evident compared to the sample of the initial state. The same can be said of the total limestone component that has influenced the pH, alkalizing the soil, and of total nitrogen. The decomposition process brought phosphorus to the control and treated samples, it is noted that potassium in the control has slightly increased while in the treated sample it has drastically decreased, this is due to the development of new seedlings that are qualitatively superior to the seedlings grown in the control sample.
CONCLUSIONS
CO2Fixator is an innovative product composed of a mix of bacteria and the fungus Trichoderma viride, designed to fix CO2 to the soil and improve the quality of the soil. The technology behind CO2Fixator exploits the synergistic effect between bacteria and the fungus Trichoderma viride. The synergistic action of the CO2Fixator promotes soil reconstruction by preventing erosion, water retention prevents soil leaching and the loss of mineral salts and organic matrix, an increase in soil volume corresponds to an increase in soil fertility. The CO2Fixator transforms agricultural soil into a Carbon Sink of choice, simultaneously improving its quality.