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首页> 美国卫生研究院文献>Scientific Reports >Labile organic carbon pools and enzyme activities of Pinus massoniana plantation soil as affected by understory vegetation removal and thinning
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Labile organic carbon pools and enzyme activities of Pinus massoniana plantation soil as affected by understory vegetation removal and thinning

机译：林下植被去除和间伐对马尾松人工林土壤有机碳库和酶活性的影响

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摘要

The effects of forest management on carbon (C) sequestration are poorly understood, particularly in the Three Gorges Reservoir area. We aimed to identify the effects of forest management on C sequestration in Pinus massoniana plantations. An intact control forest (CK), a site undergoing regular shrub cutting with the simultaneous removal of residues (SC), a site under low-intensity thinning (LIT), and a site under high-intensity thinning (HIT) were compared for soil labile organic carbon (LOC), related enzyme activities, and soil characteristics. Soil organic carbon (SOC) significantly decreased in the HIT treatment as compared with that in the CK treatment. Soil EOC, DOC, MBC contents in treated plots were higher than those in the CK treatment; particularly, the HIT treatment significantly increased those values in 0–10 cm layer. Thinning resulted in a decrease in cellulase and amylase activities, but an increase in invertase activity. In addition, the SOC content was significantly correlated with four enzymes activities and LOC components, which suggested that the soil LOC components and enzymes activities were sensitive to the changes of SOC. Our results suggest that high-intensity thinning treatment in Pinus massoniana plantation could significantly decrease the SOC content and lead to an increase of LOC components.
机译：人们对森林经营对碳（C）固存的影响知之甚少，尤其是在三峡水库地区。我们旨在确定森林管理对马尾松人工林固碳的影响。比较完整对照林（CK），进行常规灌木砍伐并同时清除残留物的地点（SC），低强度间伐的地点（LIT）和高强度间伐的地点（HIT）不稳定的有机碳（LOC），相关的酶活性和土壤特性。与CK处理相比，HIT处理的土壤有机碳（SOC）显着降低。处理地的土壤EOC，DOC，MBC含量均高于对照。特别是，HIT处理显着增加了0-10cm层中的那些值。变薄导致纤维素酶和淀粉酶活性降低，但是转化酶活性提高。此外，土壤有机碳含量与四种酶活度和LOC成分均显着相关，表明土壤中的有机碳和酶活度对土壤有机碳的变化敏感。我们的结果表明，马尾松人工林的高强度疏伐处理可以显着降低SOC含量并导致LOC成分增加。

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