Soil compaction by forestry harvester operation: evolution of physical properties

Revista Brasileira de Engenharia Agrícola e Ambiental

Casado, Juan Pablo²  Claverie, Jorge Alejandro²  Marlats, Raúl¹  Balbuena, Roberto Hernán²  Terminiello, Antonino Marcelo² 

[1] Universidad Nacional de La Plata, La Plata;Universidad Nacional de La Plata, La Plata, Argentina

关键词: traffic intensity;    cone index;    bulk density    INTRODUCCIÓN El constante y significativo aumento del peso de los vehículos agrícolas y forestales registrado en las últimas décadas;    preocupa por las consecuencias a largo plazo sobre la productividad de los suelos transitados;    con implicancias en la conservación de los recursos;   

DOI  :  10.1590/S1415-43662000000300023

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The long-term effects on soil compaction by different traffic intensities during forestry harvester operation were evaluated in field experiments on heavy clay, vertic Argiudol. A conventional 2WD 73.5 kW engine power tractor with a trailer, 4.2 Mg and 3.75 Mg total load respectively, were used on a multiclonal Populus deltoides (Marsh) 3x3 plantation. There were four treatments: one pass, five pass and ten repeated passes with the tandem over the same track, and a control plot without experimental traffic. Moisture content, bulk density and penetrometer resistances were evaluated before and immediately after the traffic treatments and three years later. Effects of induced soil compaction by traffic were especially marked on topsoil, with cone index increments between 76 and 16% in the first 40 cm of the surface layer after treatments. Bulk density had a similar tendency but limited to a 15 cm depth. Three years later, only subsoil cone index in the track line, below 20 cm depth, was significantly higher than the interline track soil cone index. The 10 passes treatment had significant differences compared to the 1 pass and no traffic control plot treatments from the surface layer to 50 cm depth, without differences with the 5 passes treatment in most of the studied soil layers. Subsoil compaction may be induced by repeated traffic with low axle load and their effects persist for a very long time.

【 授权许可】

CC BY-NC