137Cs profiles in erosion plots with different soil cultivation

被引：0

作者：

A. C. Andrello

C. R. Appoloni

E. A. Cassol

F. L. Melquiades

机构：

[1] Departamento de Física,

[2] CCE,undefined

[3] Universidade Estadual de Londrina,undefined

[4] Departamento de Física,undefined

[5] CCE,undefined

[6] Universidade Estadual de Londrina,undefined

[7] Faculdade de Agronomia,undefined

[8] UFRGS,undefined

[9] Departamento de Física,undefined

[10] Universidade Estadual do Centro Oeste,undefined

来源：

Journal of Radioanalytical and Nuclear Chemistry | 2006年 / 269卷

关键词：

Soil Erosion; Soil Loss; Conventional Tillage; 137Cs Activity; Native Pasture;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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.

引用

页码：761 / 765

页数：4