137Cs profiles in erosion plots with different soil cultivation |
| |
| Authors: | A C Andrello C R Appoloni E A Cassol F L Melquiades |
| |
| Institution: | (1) Departamento de Física, CCE, Universidade Estadual de Londrina, P.O. Box 6001, 86051-990 Londrina, Brazil;(2) Departamento de Física, CCE, Universidade Estadual de Londrina, P.O. Box 6001, 86051-990 Londrina, Brazil;(3) Faculdade de Agronomia, UFRGS, P.O. Box 15100, 91501-970 Porto Alegre, Brazil;(4) Departamento de Física, Universidade Estadual do Centro Oeste, P.O. Box 3010, 85015-430 Guarapuava, Brazil |
| |
| Abstract: | Summary Cesium-137 methodology has been successfully used to assess soil erosion. Seven erosion plots were sampled to determine the
137Cs profile and to assess the erosion rates. Cesium-137 profile for native pasture plot showed an exponential decline below
5 cm depth, with little 137Cs activity in the superficial layer (0-5 cm). Cesium-137 profile for wheat-soybean rotation plot in conventional tillage
showed a uniform distribution with depth. For this plot, the soil loss occurs more in middle than upper and lower level. Cesium-137
profile for wheat-soybean rotation and wheat-maize rotation plots in no-tillage showed a similar result to the native pasture,
with a minimum soil loss in the superficial layer. Cesium-137 profile for bare soil and cultivated pasture plots are similar,
with a soil erosion rate of 229 t ha-1 year -1 . In the plots with a conventional tillage a greater soil loss occur in middle than upper and lower level. In no-tillage
cultivation plots occurs soil loss in lower level, but no sign of soil loss neither gain in the upper level is observed. Cesium-137
methodology is a good tool to assess soil erosion and the 137Cs profile gives possibility to understand the soil erosion behavior in erosion plots. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
