Root-system of peanuts as affected by phosphorus fertilization

• Autor(a) principal: Marubayashi, O. M.
• Data de Publicação: 1994
• Outros Autores: Rosolem, Ciro Antonio [UNESP], Zanotto, Maurício Dutra [UNESP]
• Tipo de documento: Artigo
• Idioma: spa
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://seer.sct.embrapa.br/index.php/pab/issue/view/69; http://hdl.handle.net/11449/36638
• topic: ARACHIS HYPOGAEA; CULTIVARS; ROOTS; PHOSPHORUS

There have been some responses of peanut roots to phosphorus. An experiment was carried out to study peanut root growth and distribution as related to P in the soil. The cultivars Tatu, Oira and Tup4 and the lines FCA 170 and FCA 265 were grown with or without P fertilization with 80 kg P2O5/ha, as triple superphosphate. The fertilizer was applied in the seed furrows. There was higher P contents in the 0-10 cm layer of the soil 36 days after P application. At 66 and 98 days after application, P contents of the soil were increased by fertilization down to 15 cm. There was no response of peanut roots to P fertilization. Oira showed the highest root lenght density and Tatu the lowert. There was a root concentration the first 15 cm of the soil. Oira with the largest root system showed the lowest P absorption, and Tatu, with the smallest root system absorbed as much P as the others.