4.3.4 Organic Carbon
Values of organic carbon dissolved in water (C), were higher in T1, with
averages of 9.76, 10.50 and 8.55 mg 1-l, in the months
of February, October and December, respectively, reaching values โโof C
above 19 mg 1-1 in 2000. In treatment T2, the average
carbon values retrieved were โโ 6.25, 5.88 and 4.90 mg
1-l, for the same months, ranging between 4.9 and 6,2
mg 1-1 (Figure 3H); while in T1, the phosphorus
content ranged between 8.5 and 10.5 mg 1-1 (Figure
3G).
This confidently demonstrates that the amount of C in the water, after
the implementation of the project, was lower than before. Hence in this
case, the conservationist practices implemented have contributed to a
smaller amount of eroded sediments, which corroborates the results of
Silva et al. (2005) since, in their study, the organic C was the main
component of the largest part of the eroded sediments, emphasizing the
need for conservationist practices that reduce the erosive action of
rain, maintaining this organic fraction in the soil.