01484naa a2200217 a 450000100080000000500110000800800410001910000240006024501490008426000090023352008130024265000220105565000230107765000190110065000230111965300130114270000160115570000170117170000210118877300570120920169772015-08-24       2005    bl uuuu     u00u1 u    #d1 aFERNANDES, S. A. P.  aSewage sludge effects on gas fluxes at the soil-atmosphere interface, on soil d13C and on total soil carbon and nitrogen.h[electronic resource]  c2005  aThe objective of this wark waqs to study the effect of long-term and continued application of sewage sludge on total carbon and nitrogen, soil d13C and on the gas fluxes at the soil-atmosphere interface under field conditions in the tropical region. To that effect, four applications fo sewage from an industrialized region were performed on a Dark Red Dystroferric Latosol. Sludge was incorporated to the soil at concentrations of 0, 1, 2, 4 and 8 times the recommended rate based on their nitrogen content in four consecutive corn cultivations. All sludge rates increased the concentration of soil C and N as compared to the control. The soil C contents at the highest sewage sludge rate increased by 55% and 48% at the layers from 1 to 10 cm and from 10 to 20 cm, respectively, as compared to the control.  aGreenhouse effect  aMicrobial activity  aOrganic matter  aMatéria orgânica  aBiosolid1 aBETTIOL, W.1 aCERRI, C. C.1 aCAMARGO, Plínio  tGeoderma, Amsterdamgv. 125, n. 1-2, p. 49-57, 2005.