Compactação do solo e desenvolvimento de couve-brócolo sob diferentes intensidades de tráfego de tratores

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

19/03/2009

RESUMO

Intensive and mechanised agriculture took care of the necessities of the increasing world-wide demand for agricultural products, and at the same time, was the cause of negative effect in the fertility in the soil, the preservation of the natural resources and in the development and productivity of plants. This work compared the levels of compacting in the soil and the distribution of broccoli roots, adopting a small, average and great tractor (Agrale 4100, MF 285 and JD 6405, respectively), varying the intensity of traffic in the area, and also the influence of the compacting in the physiology and production of broccoli mass. The experiment was installed in Londrina, Eutroferric Red Latossol (Oxisol) in years 2007 and 2008, testing tractor of small, medium and great size, tractors with three situations of traffic intensity and a control treatment. The effects in the soil, broccoli plant development, the compactation by penetrometry, the translocation of the crude sap and dried mass were assessed. The increasing intensity of tractor traffic increase soil penetration resistance, mostly at 0.20 m depth. This increase was cumulative according to the number of times the tractor cross the soil and a direct relation was found between the size of the tractor and the compactation. These effects were evidenced observing the growing amount of roots according to growing penetration resistance (until 0.20 m). The reduction of dried mass of roots did not limit the water absortion and sap translocation. The variation of translocation did not generate proportional variation in dried mass of plants.

ASSUNTO(S)

solos - compactação couve-flor - cultivo brócolo - raízes soil compaction cauliflower plantations

ACESSO AO ARTIGO

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