Produção Nacional
Avaliação de fontes e doses de fósforo no crescimento inicial do milho
2007; UNIVERSIDADE ESTADUAL DE LONDRINA; Volume: 28; Issue: 1 Linguagem: Inglês
10.5433/1679-0359.2007v28n1p39
ISSN1679-0359
AutoresN. Harger, Osmar Rodrigues Brito, Ricardo Ralisch, Fábio Rogério Ortiz, Toshio Sérgio Watanabe,
Tópico(s)Growth and nutrition in plants
ResumoPhosphorus is an essential element for all living organisms and important also for agricultural production. The content of P in most agricultural soils in Brazil is low. In order to supply the plant needs and the soil fixation, application of P fertilizer is required. Among the various options of P fertilizers in the market, the totally acidified phosphates are usually commercialized. The evaluation of the efficiency of the reactive natural phosphates as P fertilizers is important due to the increase of the utilization of cheaper sources of natural P. The experiment was carried out in green house, using a Nitossolo. The experimental design used was complete randomized design, with the treatments in a 4x2 factorial arrangement, and four replications. The objective of the experiment was to evaluate the effects of sources and rates of P on the growth of corn. The production of dry matter and the content of P on the corn leave and stalks (above ground corn parts) increased as rates of P increased, regardless the P sources tested. However, the Triple Super Phosphate was more efficient compared with Arad phosphate, providing better nutrition and initial growth of corn plants.
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