Boron in material of three soils from Lavras, MG, Brazil

• Autor(a) principal: Vanderlei, Job Carneiro
• Data de Publicação: 2014
• Outros Autores: Faquin, Valdemar, Guedes, Geraldo Aparecido de A., Curi, Nilton
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14142
• topic: total boron; available boron; biological method; chemical extractants; boro total; boro disponível; método biológico; extratores químicos

Materials of Red-Yellow Latosol (RYL), Purple Latosol (PL) and Red-Yellow Podzol (RYP) located in Lavras, MG, Brazil, were studied to determine the level of total B and its relationship to the level of available B, and to determine the available B, by the following methods: biological of sunflower, hot water, hydrochloric acid and acetic acid. The experiment was performed in a completely randomized design with a factorial scheme of 3 x 6 (three soils and six doses of B: 0.0; 0.1; 0.2; 0.4; 0.8 and 1.6 ppm), and four replicates. Containers with a capacity of 0.5 kg of earth were used, and five plants of sunflower (Helianthus annuus L.) were grown in each container for 45 days. The soil material that was shown to be most efficient in providing B for the plants was RYL followed by PL and RYP. The level of total B, at least in the case of the soil materials studied, appears to be a good index of its availability. In the assessment of available B, the hot water method was shown to be most efficient, followed by HCl. The assessment by the biological method reproduced well the levels of B originally extracted by hot water.