To investigate carbon (C) mineralization characteristics of compost made from pruning material (PM), C mineralization parameters were evaluated, including mineralizable C (C₀), apparent activation energy (E_a), and the rate constant of mineralization (k). These properties were also examined in conventional composts made from dung (D), fallen leaves (L), and bark (B). No significant differences among the plant composts (L, B and PM) were observed for E_a. Notably, the values of the respective indicators were significantly greater in PM, L and B than in D. The C₀ of PM was significantly greater than that of the other composts. Conversely, the k-value for PM was significantly smaller than that for the other composts. These results indicate that PM supplies a substantial amount of mineralizable C that persists for a long time after the PM has been mixed with soil.

中文翻译：

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修枝材料堆肥的碳矿化特征

为了研究修剪材料（PM）制成的堆肥的碳（C）矿化特性，评估了C的矿化参数，包括可矿化的C（C ₀），表观活化能（E _a）和矿化速率常数（k）。在用粪便（D），落叶（L）和树皮（B）制成的常规堆肥中也检查了这些性质。E _a的植物堆肥（L，B和PM）之间没有显着差异。值得注意的是，PM，L和B中各项指标的值均显着高于D。PM的C ₀显着高于其他堆肥的C ₀。相反，kPM值明显小于其他堆肥。这些结果表明，PM提供了大量的可矿化碳，这些PM在与土壤混合后会持续很长时间。