SPATIAL VARIABILITY OF PHYSICAL ATTRIBUTES OF A RED-YELLOW ULTISOL UNDER PASTURE AND SECONDARY VEGETATION IN NATURAL REGENERATION

被引：11
|
作者：
Lima, Juliao S. de S. [1 ]
Sattler, Marcos A. [2 ]
Passos, Renato R. [3 ]
Oliveira, Paulo C. [1 ]
de Souza, Gustavo S., II [4 ]
机构：
[1] UFES, Dept Engn Rural, Alegre, ES, Brazil
[2] EAFA, Alegre, ES, Brazil
[3] UFES, Dept Prod Vegetal, Alegre, ES, Brazil
[4] Univ Estadual Campinas, Campinas, SP, Brazil
来源：
ENGENHARIA AGRICOLA | 2009年 / 29卷 / 02期
关键词：
soil management; geostatistics; semivariogram;
D O I：
10.1590/S0100-69162009000200002
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This work was carried out with the objective of studying the spatial variability of the physical attributes of a Red-Yellow Ultisol under pasture and secondary vegetation in natural regeneration. Two areas were chosen in a hillside, with the soil sampling to the depth of 0-0.2 m, with the georeferenced points in a regular grid of 10x10 m, totalizing 64 points. In each point it was evaluated the total volume of porosity, macroporosity, microporosity, bulk density, soil penetration resistance and soil water content. The studied attributes in the pasture area present indicator of soil compaction for the animals' traffic, with moderate and strong structure of spatial dependence, except for the macroporosity and penetration resistance. In the area of secondary vegetation (VN) only the macroporosity does not present spatial dependence. The total volume of porosity and the bulk density present the same spatial standard in the area under pasture.
引用
收藏
页码：185 / 195
页数：11
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