The relationships between the spatial heterogeneity of maize fields, due to row-cropping and farm... more The relationships between the spatial heterogeneity of maize fields, due to row-cropping and farm machinery traffic, and earthworm abundance were studied in three plots receiving different organic matter treatments: no organic fertilizer, pig slurry and farmyard-manure. In all plots, there was no significant effect of farm machinery traffic although there was a tendancy for earthworms to be less abundant under
ABSTRACT The aim of this work was to study the effects of soluble aluminium on the morphology and... more ABSTRACT The aim of this work was to study the effects of soluble aluminium on the morphology and growth of the adventitious root system, aerial biomass and grain yield of maize (Zeamays). The analysis focuses on two hybrid cultivars (Al-sensitive HS7777 and Al-tolerant C525M). Experiments were carried out in the field and in a rhizotron in Curitiba, Paraná, Brazil. In the field, four levels of lime application were used: T0 = 0 t ha1, T2 = 7.0 t ha1. Two levels were used in a rhizotron: T0 and T3. In the surface horizon (0M. In the field, neither Al concentration in the soil solution nor cultivar affected the number of primary adventitious roots per internode or the total number of primary adventitious roots. However, root diameter, plant population and grain yield of the two cultivars confirmed the differences in Al tolerance between them. Al was observed to have an adverse effect on the grain yield from C525M, while low yields from HS7777, at all levels of Al, precluded any response to liming. In the rhizotron studies, Al concentration and cultivar affected the root branching and total root length. Cultivar C525M had more branches and total root length than HS7777, mainly at low concentrations of soil Al solution, leading to greater spatial colonization of the soil down to 0.9 m depth.
... Vincent Hallaire Corresponding Author Contact Information , E-mail The Corresponding Author ,... more ... Vincent Hallaire Corresponding Author Contact Information , E-mail The Corresponding Author , a , Pierre Curmi a , Arnaud Duboisset a , b , Patrick Lavelle b and Beto Pashanasi c. a Unité sol et agronomie Rennes Quimper (Inra), 65, route de St-Brieuc, 35042 Rennes, France. ...
The relationships between the spatial heterogeneity of maize fields, due to row-cropping and farm... more The relationships between the spatial heterogeneity of maize fields, due to row-cropping and farm machinery traffic, and earthworm abundance were studied in three plots receiving different organic matter treatments: no organic fertilizer, pig slurry and farmyard-manure. In all plots, there was no significant effect of farm machinery traffic although there was a tendancy for earthworms to be less abundant under
ABSTRACT The aim of this work was to study the effects of soluble aluminium on the morphology and... more ABSTRACT The aim of this work was to study the effects of soluble aluminium on the morphology and growth of the adventitious root system, aerial biomass and grain yield of maize (Zeamays). The analysis focuses on two hybrid cultivars (Al-sensitive HS7777 and Al-tolerant C525M). Experiments were carried out in the field and in a rhizotron in Curitiba, Paraná, Brazil. In the field, four levels of lime application were used: T0 = 0 t ha1, T2 = 7.0 t ha1. Two levels were used in a rhizotron: T0 and T3. In the surface horizon (0M. In the field, neither Al concentration in the soil solution nor cultivar affected the number of primary adventitious roots per internode or the total number of primary adventitious roots. However, root diameter, plant population and grain yield of the two cultivars confirmed the differences in Al tolerance between them. Al was observed to have an adverse effect on the grain yield from C525M, while low yields from HS7777, at all levels of Al, precluded any response to liming. In the rhizotron studies, Al concentration and cultivar affected the root branching and total root length. Cultivar C525M had more branches and total root length than HS7777, mainly at low concentrations of soil Al solution, leading to greater spatial colonization of the soil down to 0.9 m depth.
... Vincent Hallaire Corresponding Author Contact Information , E-mail The Corresponding Author ,... more ... Vincent Hallaire Corresponding Author Contact Information , E-mail The Corresponding Author , a , Pierre Curmi a , Arnaud Duboisset a , b , Patrick Lavelle b and Beto Pashanasi c. a Unité sol et agronomie Rennes Quimper (Inra), 65, route de St-Brieuc, 35042 Rennes, France. ...
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