Shoot and root responses of Trifolium vesiculosum to boron fertilization in an acidic Brazilian soil

Abstract

To analyze the influence of boron fertilization on shoot and root growth of Trifolium vesiculosum (arrowleaf clover), an acid soil profile (60 cm depth with 67% Al saturation) was recreated in a column (three layers of 20 cm each). Lime and fertilizer (P and K) were incorporated into the top 20 cm. The treatments consisted of six boronrates where boric acid was mixed throughout the profile. Addition of boron to soil with low pH and high Al increased the root and shoot growth, independent of the rate applied. Boron inhibited Al toxicity, but no effect was observed in the root length when Al was not present in the soil. It was also observed that there was more root growth below the plow layer (0-20 cm,) suggesting better root distribution in the soil profile which could be important for the plant growth, especially under drought conditions.

Growth Characteristics of Bahiagrass Roots Treated with Micronutrients, Rare Earth Elements, and Plant Hormones

“…Although some researchers have reported that B treatments can induce plant root elongation (Brdar-Jokanovic et al, 2010;Martin-Rejano et al, 2011), this was not the case here for bahiagrass, as we found no significant effects on root lengths or surface areas. Our results are consistent with those of Favaretto et al (2007) on arrowleaf clover (Trifolium vesiculosum) and Correa et al (2006) on rice (Oryza sativa).…”

Adubação Bórica Na Produção De Forragem E Componentes Radiculares De Trevo Branco

“…Essa resposta em termos de aumento de matéria seca à adição de B também pode ser explicada pelas afirmações de Dechen e Nachtigall (2007) que relataram a atuação do B, na atividade de hormônios, e em processos biológicos como fotossíntese, metabolismo de carboidratos e do nitrogênio, influenciando à divisão celular e o acúmulo de biomassa, nos pontos de crescimento, o que poderia resultar em aumento de matéria seca da parte aérea. Respostas similares foram observadas por Favaretto et al (2007), em experimento com Trifolium vesiculosum que obtiveram um incremento de 130% na produção de matéria seca com uso de boro. Em trabalho realizado por Fageria (2000) o boro influenciou a produção de matéria seca da parte aérea e de raízes de arroz, feijão, milho, soja e trigo, sendo que as respostas variaram conforme a cultura.…”

Boron alters cation exchange properties of corn roots but does not decrease aluminum toxicity

“…Pereira et al (2008) reported similar effects of Al on sorghum root systems grown in nutrient solution. The amelioration of Al toxicity in the root system in response to B addition has been recorded in leguminous plants, particularly for root-growth related attributes (LENOBLE et al, 1996;FAVARETTO et al, 2007). Studying corn plants, Wang (2004) found no amelioration of Al rhizotoxicity with the addition of B to the nutrient solution.…”

“…The corn DM decrease with the addition of Al and the B failed to decrease this toxicity ( Figure 2). Studies have found amelioration of Al toxicity with B application generally occurs using species with a high B demand, like squash (LUBASZEWSKI; BLEVIS, 1996), clover (FAVARETTO et al, 2007), and pea (YU et al, 2009). However, in one of the few studies with grasses, Hossain et al (2004) reported amelioration of Al toxicity with the addition of B in nutrient solution for seedlings of wheat, a species with low B requirements.…”