Responses of net primary production and plant-available soil nutrients to elevated nutrient input in a tropical forest on highly weathered soil

Abstract

94.0 m 3 ha -1 removed . This resulted in a higher abundance of mid-stage succession tree species (e.g. Funtumia elastica). Logging was mainly on trees of the Meliaceae Bulk density (g/cm 3 ) 1.23 ± 0.03 1.53 ± 0.03 1.38 ± 0.03 Soil pH (1:2.5 H2O) 6.43 ± 0.04 6.08 ± 0.09 5.90 ± 0.10 Total soil nitrogen (kg/m 2 ) 0.42 ± 0.01 0.57 ± 0.02 0.56 ± 0.02 Total organic carbon (kg/m 2 ) 4.02 ± 0.13 4.59 ± 0.20 4.09 ± 0.19 Soil C:N ratio 9.54 ± 0.10 7.99 ± 0.08 7.22 ± 0.11 15 N natural abundance (‰) 7.79 ± 0.06 9.22 ± 0.13 9.51 ± 0.16 Bray II phosphorus (g/m 2 ) † 1.80 ± 0.24 0.85 ± 0.08 0.65 ± 0.06 Effective cation exchange capacity (mmol + /kg) 149.