Tolerance of Certain Weeds and Grasses to Toxic Aluminum

Using Lime to Ameliorate Topsoil and Subsoil Acidity

“…This interaction can cause confusion and can be a confounding factor in plant responses to liming in the field. It has long been known that Al toxicity inhibits root growth [63]; there are many examples of this phenomenon in the literature. Thus, a plant exposed to Al toxicity also exhibits intolerance to moisture stress because the root system is unable to exploit fully soil moisture reserves [5,39,40].…”

Differential Responses of Grasses and Legumes to Liming and Phosphorus Fertilization1

“…The conclusive results of Vlamis (15) support the latter view. Several workers (7,10,11,12) using soil solution and culture solution have shown that fairly low concentrations of aluminum are detrimental to many plant species.…”

“…Gilbert and Pember (7) and Hardy (8) showed that there are large differences in the susceptibility of plant species to aluminum toxicity. Blaser and Brady ( 4) have demonstra_ted that nutrient competition between plants is an ecological factor.…”

Absorção e utilização do fósforo pelas culturas da soja e do feijão e por plantas daninhas

“…Os fertilizantes podem ser usados para alterar as relações de competitividade, de modo a favorecer as espécies cultivadas, desde que as espécies competidoras apresentem respostas diferenciadas à aplicação de nutrientes (Armstrong et al, 1993 em áreas agrícolas pode influenciar a mudança da comunidade e a densidade populacional de plantas daninhas infestantes (Gilbert & Pember, 1975;Hoveland et al, 1976). Armstrong et al (1993) constataram que a adição de P não só ocasionou incremento no crescimento e na absorção de nutrientes de plantas de Cenchrus ciliaris (espécie desejável), mas também aumentou a habilidade competitiva dessa espécie contra a invasora Aristida armata.…”