Nitrogen fixation rate of Acacia mangium Wild at mid rotation in Brazil is higher in mixed plantations with Eucalyptus grandis Hill ex Maiden than in monocultures

Table 1 Ranges of basal area and height of the trees sampled for the estimation of biomass and N₂ fixation in the monospecific stands of Acacia mangium and Eucalyptus grandis (100A and 100E, respectively) and the mixed-species stands (50E:50A–Acacia and 50E:50A–Eucalyptus), at 39 months of age

Treatment/species	Trees sampled for biomass quantification		Trees sampled for N₂ fixation analysis
Treatment/species	Basal area (cm² tree⁻¹)	Height (m)	Basal area (cm² tree⁻¹)	Tree height (m)
100A	30.6–310.9	6.7–10.7	42.1–215.3	8.7–10.2
100E	82.0–249.6	14.4–19.1	53.8–187.2	14.8–19.1
50E:50A–Acacia	29.9–232.1	7.3–9.9	66.1–226.0	9.5–10.9
50E:50A–Eucalyptus	107.8–280.8	14.0–19.5	37.5–254.1	12.4–18.6

ISSN: 1297-966X