Phosphorus uptake and growth of corn with its root system partially exposed to a phosphorus source

• Autor(a) principal: Novais, Roberto Ferreira de
• Data de Publicação: 2014
• Outros Autores: Ferreira, Reinaldo Paula, Neves, Júlio César Lima, Barros, Nairam Félix de
• 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/15764
• topic: Zea mays; phosphorus placement; split-root; germination in vermiculite; Zea mays; localização de fósforo; raízes subdivididas; germinação em vermiculita

To evaluate if the behaviour of corn (Zea mays L.) is affected by the application of a soluble source of phosphorus to only part of its root system, an experiment was carried out under greenhouse conditions, utilizing the split-root technique. One-week old seedlings obtained after germination in vermiculite, were transplanted to geminated pots, each side with 1,4 kg of a Dark-Red Latosol, in such way one-half of the root system was in each pot. Three rates of phosphorus (50, 100 and 200 mg P/kg soil) were applied in one of the two pots or equally divided between them. The P source was well mixed with the soil. Twenty-nine days after transplanting, the plants were harvested (shoots and roots), oven dried, weighted and the plant P content determined. Greater growth and shoot P content were observed when the highest rate of P was equally divided between the two pots of the set compared with its application in only one pot of the set.