N2O emissions in Acacia mangium stands with different ages, in Sumatra, Indonesia

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Abstract We compared nitrous oxide (N2O) emissions in different-aged (1, 3, and 5 years) Acacia mangium plantations and secondary forests for two and a half years at three areas in Sumatra, Indonesia. N2O emission was high from November to March (rainy season) and low from May to November (relatively drier season). In the first year, the average ± standard deviation of annual N2O emissions in 1-year-old sites was 8.92 ± 2.29 kg ha−1 of N, which was larger than those in 3-year-old (2.58 ± 2.28 kg ha−1 of N) and 5-year-old (2.16 ± 1.12 kg ha−1 of N) sites and secondary forests (1.38 ± 0.45 kg ha−1 of N) (p

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