Effects of substrate addition on soil respiratory carbon release under long-term warming and clipping in a tallgrass prairie.

In the UW plots, total soil respiratory C release was relatively higher with additional C 4 materials (5661 μg g −1 ) than with C 3 materials (5448 μg g −1 ) with marginal significance (p = 0.09), even though C 3 plant materials had a higher quality with a lower C:N ratio ( Fig. 2 ).

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