Differences in mechanical conditions of a clayey soil under different tillage systems

Revista Brasileira de Engenharia Agrícola e Ambiental

Draghi, Laura M.²  Rosatto, Héctor¹  Botta, Guido F.²  Claverie, Jorge A.²  Balbuena, Roberto H.² 

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

关键词: induced compaction;    no tillage;    penetration resistance    INTRODUCCIÓN La siembra directa es;    sin duda;    un sistema muy utilizado en la producción agrícola moderna de la Argentina;    existiendo en la actualidad más de 10 millones de hectáreas (Consejo Federal de Inversiones;    2001) cultivadas según esta modalidad;    contribuyendo a su muy rápida difusión la técnica del doble cultivo trigo-soja;   

DOI  :  10.1590/S1415-43662005000100018

学科分类：农业科学（综合）

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

【 摘 要 】

With the aim to evaluate the soil mechanic reaction-traffic relationship to different tillage systems, penetration resistance and soil bulk density measurements were made. Four traffic conditions (6, 8, 10 and 12 passes of a 2WD, 52.25 kW tractor) were evaluated in a typic Argiudol soil with six years of wheat-soybean rotation under no-tillage and conventional tillage. Bulk density and penetration resistance were used to evaluate the traffic effects on soil compaction. After the six-year rotation, no-tillage system showed significant higher penetration resistance values with respect to conventional tillage system in the topsoil layer. The bulk density values recorded in the non tillage system determine root growth limitation at low number of passes and at shallow depth. The greater the number of passes, lower the depth at which the penetration resistance can reach potential root growth limiting values.

【 授权许可】

CC BY-NC