Nitrogen mineralization and nitrogen uptake by maize as influenced by light and heavy organic matter fractions

摘要

AbstractOn a sandy tropical soil, organic materials (prunings ofLeucaena leucocephala, Senna siameaand maize stover) with contrasting C/N ratio (13, 18 and 56, respectively) were applied at the rate of 15 t ha−1a−1in order to increase the amount of soil organic matter. Two light fractions (LF1 = LF>2 mm and LF2 = 0.25 mm