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Nitrogen dynamics in a soil-sugar cane system

2000; UNIVERSIDADE DE SÃO PAULO; Volume: 57; Issue: 3 Linguagem: Inglês

10.1590/s0103-90162000000300015

1678-992X

J. C. M. Oliveira, Klaus Reichardt, Osny Oliveira Santos Bacchi, Luís Carlos Timm, Durval Dourado Neto, Paulo César Ocheuze Trivelin, Tânia Toyomi Tominaga, Roberta de Castro Navarro, Marisa de Cássia Píccolo, Fabio Augusto Meira Cássaro,

Rice Cultivation and Yield Improvement

Results of an organic matter management experiment of a sugar cane crop are reported for the first cropping year. Sugar cane was planted in October 1997, and labeled with a 15N fertilizer pulse to study the fate of organic matter in the soil-plant system. A nitrogen balance is presented, partitioning the system in plant components (stalk, tip and straw), soil components (five soil organic matter fractions) and evaluating leaching losses. The 15N label permitted to determine, at the end of the growing season, amounts of nitrogen derived from the fertilizer, present in the above mentioned compartments.