Table 2 The median/mean, and range of greenhouse gas fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), and water chemical-physical properties from drainage ditches in first and second rotation in Sarawak, Malaysia.
From: Greenhouse gas emissions from ditches in oil palm plantations on tropical peatlands in Malaysia
First rotation (n = 57) | Second rotation (n = 29) | Combined (n = 86) | |||||
|---|---|---|---|---|---|---|---|
Median/mean | Range | Median/mean | Range | Median/mean | Range | ||
CO2 g m−2 d−1 | 17.1/17.1 | 4.4–42.8 | 16.7/17.1 | 2.2–38.9 | 17.1/17.1 | 2.2–42.8 | |
CH4 total g m−2 d−1 | 0.19/0.34 | 0.004–2.66 | 0.07/0.42 | 0.004–2.83 | 0.18/0.37 | 0.004–2.83 | |
CH4 diffusive g m−2 d−1 | 0.09/0.14 | 0.004–0.67 | 0.02/0.08 | 0.004–0.6 | 0.06/0.12 | 0.004–0.67 | |
CH4 ebullitive g m−2 d−1 | 0.07/0.20 | 0–2.67 | 0.01/0.34 | 0–2.82 | 0.04/0.25 | 0–2.82 | |
N2O mg m−2 d−1 | − 0.08/− 0.03 | − 0.53–0.38 | − 0.16/− 0.20 | − 0.16–0.07 | − 0.12/− 0.09 | − 0.53–0.38 | |
pH | 3.60/3.62 | 3.54–3.92 | 3.70/3.73 | 3.61–4.07 | 3.63/3.66 | 3.54–4.07 | |
Oxidation–reduction potential | 346.0/338.5 | 175.6–452.2 | 306.0/284.8 | 156–366.1 | 323.4/320.4 | 156–425.2 | |
Water temperature (℃) | 29.9/30.1 | 28.1–33.1 | 28.7/28.7 | 27.5–29.8 | 29.2/29.6 | 27.5–33.1 | |
Dissolved oxygen concentration (mg L−1) | 0.90/1.66 | 0.17–6.1 | 0.46/0.85 | 0.21–4.05 | 0.83/1.39 | 0.17–6.1 | |
Electrical conductivity (µS cm−1) | 88.0/85.7 | 60.8–92.5 | 83.8/83.8 | 72.3–90.9 | 87.3/85.1 | 60.8–92.5 | |
Water depth (cm) | 55.0/54.4 | 30–78 | 47.0/46.6 | 26–67 | 50.0/51.8 | 26–78 | |
