Teores de metais pesados e de enxofre no solo em áreas de influência de canais e reservatórios de vinhaça de fertirrigação
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2008-07-21
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Universidade Federal de Goiás
Resumo
This study aimed to evaluate the values of pH and the levels of cadmium,
chromium, nickel, lead, copper, iron, manganese, zinc and sulphur in the soil profile,
beyond the behavior of those elements with respect to the acidity of soil in tropical climate,
in areas of influence of channels and reservoirs of vinasse used in fertigation of sugarcane
plants (Saccharum officinarum L.). Adopted as treatment witness the soil under a natural
untouched savannah area. The treatments of the first test consisted of vinasse channels with
three periods of use: one, three and 20 years, totaling seven treatments (control and three
channels, considering the parts internal and external), with four repetitions each. The
second test consisted of four vinasse tanks with different periods of use, and found two
seasons: three years (R3A and R3B) and 20 years (R20A and R20B) followed, constituting
nine treatments (control and four tanks, measuring up the soil of the parties internal and
external), with four repetitions each. In witness and on the outside of channels and
reservoirs were collected samples of soil at depths of 0-25 cm, 25-50 cm, 50-75 cm and 75-
100 cm. On the inside (bottom) of channels and reservoirs, soil samples were collected at
depths of 0-50 cm, 50-100 cm, 100-150 cm and 150-200 cm, in four different points in
areas of Red Latosol Distrophic. The experimental design was sub-divided plots. The
results from the soil analyses were subjected to analysis of variance and testing F and
Tukey (P < 0.05). The use of vinasse channels and temporary reservoirs over the years
didn t significantly alter the levels of heavy metals, suggesting that their contents
accumulated in the soil are acceptable. However, channels and reservoirs should be
covered with waterproofing material to prevent the leaching of these elements and
therefore the contamination of the groundwater.
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GONÇALVES, Helenice Moura. Contents of heavy metals and sulphur on soil in areas of
influence of channels and reservoirs of vinasse of fertigation. 2008. 60 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2008.