SciELO - Scientific Electronic Library Online

 
vol.23 número2Agregação de um Planossolo submetido a diferentes sistemas de cultivoAvaliação experimental de um modelo numérico para o processo de redistribuição da água no solo índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

MEROTTO JR., A.  e  MUNDSTOCK, C. M.. Wheat root growth as affected by soil strength. Rev. Bras. Ciênc. Solo [online]. 1999, vol.23, n.2, pp.197-202. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06831999000200002.

Soil compaction is a common problem that affects several soil properties and plant growth. In order to assess the effects of soil strength expressed by its mechanical resistance on roots, a growth chamber experiment was conducted at the Universidade Federal do Rio Grande do Sul, Porto Alegre, in 1994, during 35 days (530 GDD, 0ºC base temperature) on a typical Paleudult soil. Treatments, using pots arranged in a completely randomized design, consisted of soil compactions that resulted in resistances of 1.0, 2.0, 3.5 and 5.5 MPa. A combination of soil gravimetric moisture and densities was used in order to minimize possible effects due to lack of water and oxygen supply to the roots under the treatments. As soil resistance increased, roots showed a reduced length, surface and dry matter, but a higher radius. As less soil was explored under high resistances, shoot and root dry matter decreased but the latter suffered the most. This study shows that soil mechanical resistance itself, is an important factor restricting plant growth, with its effects being detected very early in the plant development.

Palavras-chave : wheat; roots; soil compaction; soil resistance.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons