02559naa a2200301 a 450000100080000000500110000800800410001910000200006024501530008026000090023352016030024265000160184565000250186165000210188665000200190765000140192765000170194165000240195865000230198270000200200570000180202570000280204370000210207170000190209270000240211170000210213577301010215610154472015-09-28       2005    bl uuuu     u00u1 u    #d1 aCERDEIRA, A. L.  aEffects of sugar cane mechanical harvesting followed by no-tillage crop systems on leaching of triazine herbicides in Brazil.h[electronic resource]  c2005  aThe state of São Paulo, located in southeast Brazil, is an important sugarcane, soybean and corn producing area with high use of chemicals in agriculture and potential risk of environmental contamination (Pessoa et al. 1998). This region is also an important recharge area for groundwater of the Guarany Aquifer, which spreads to areas of eight Brazilian states plus parts of Argentina, Uruguay and Paraguay. Also, in Brazil, currently most of the sugar cane crop is burned to facilitate harvesting and this could interfere with soil properties. In São Paulo State, where the agriculture is well developed, there is a new trend toward sugar cane mechanical harvesting, without burning. This practice allows the straw to decompose in soil, maintain a better soil structure, and can interfere with the movement and leaching of solutes. It is also normal to grow other crops following sugarcane in No-tillage (NT) and conventional tillage (CT), that could further affect the movement of herbicides in the environment (Smith et al. 2001). Several studies have demonstrated the possibility of pesticides leaching to groundwater (Smith et al. 2001; Bouwer 1990). Among them, triazine herbicides such as Atrrazine,(2-chloro-4-ethylamino-6-isopropylamino-l,3,5-triazine) ametryn, (2-(ethylamino)-4-isopropylamino-6-methyl-thio-s-triazine), and simazine[2-chloro-4,6-bis(ethylamino)-l,3,5-triazíne] are used in Brazil and can contamínate groundwater (Pessoa et al. 1998). The Brazilian Health Ministry has set the maximum amount of atrazine and simazine in drinking water at 2 ug/L (Pessoa et al. 1998).  aAgrotóxico  aÁguas subterrâneas  aCana de açúcar  aEfeito residual  aHerbicida  aLixiviação  aPoluição da água  aQualidade da água1 aSOUZA, M. D. de1 aBOLONHEZI, D.1 aQUEIROZ, S. C. do N. de1 aFERRACINI, V. L.1 aLIGO, M. A. V.1 aPESSOA, M. C. P. Y.1 aSMITH JUNIOR. S.  tBulletin of Environmental Contamination and Toxicology, New Yorkgv. 75, n. 4, p. 805-812, 2005.