Percentage contribution of (A) ROC, (B) SOM and (C) RS to produced and dissolved CH<sub>4</sub> in planted microcosms with RS treatment; means ± SD (n = 4).
<p>The differences between contributions to produced and dissolved CH<sub>4</sub> were tested by two-tailed independent t-tests, indicated by <sup>*</sup> when <i>P</i><0.05.</p