Abstract
Plant species that have high biomass production are of fundamental importance to the sustainable development of no-tillage systems in the cerrado region. This experiment had the objective of evaluating the biomass production and nitrogen accumulation in 17 plant species in a Oxisol of the cerrado region. This experiment was conducted in an experimental field of the Federal University of Goias, located in the Agricultural and Biological Cientific Center of Jatai - State of Goias. The experimental layout was a randomized block with 5 replicates. The following species were used: two species of Avena strigosa, Brachiaria brizantha, Brachiaria decumbens, Eleusine indica, three species of Pennicetum americanum, Crotalaria spectabilis, Crotalaria juncea, two species of Cajanus cajan, Helianthus sp (savage), two species of Hibiscus cannabinus, Raphanus sativus and Guizotia abyssinica. Among the grasses, BRS 1501 millet presented the highest biomass production; among the legumes C. spectablis showed the same behavior; and Raphanus sativus for the other families. These three species also presented higher values for N accumulation in the shoots. The species Raphanus sativus, Hibiscus cannabinus 1 and BRS 1501 millet are the ones recommended for cover crops in cerrado soils in the Goias cerrado region.
Highlights
O bioma Cerrados, com área de 274 milhões de hectares, tem papel de extrema importância para a agropecuária brasileira
Entretanto, quando se considera o clima e solo de Cerrado, o emprego do sistema de plantio direto sugere o conhecimento e a definição de espécies para cobertura que sejam adaptadas a estas condições
BASSO, C.J. Épocas de aplicação de nitrogênio para o milho cultivado em sucessão a plantas de cobertura de solo, no sistema plantio direto
Summary
O trabalho foi realizado em campo experimental da Universidade Federal de Goiás, localizado no Centro de Ciências Agrárias e Biológicas no Campus de Jataí, Estado de Goiás. A localização geográfica do experimento é: latitude 17o53’S e longitude 51o43’W. O clima da região, segundo a classificação de Köepen, é do tipo Cw, mesotérmico, com estação seca e chuvosa definidas. No local do experimento, são apresentados na Figura 1. Durante a condução do experimento, a precipitação total foi de 223 mm e a temperatura variou de 4,5 a 33,2oC, mínimo e máximo, respectivamente
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