Soil organic carbon, microbial biomass and enzyme activities responses to natural regeneration in a tropical dry region in Northeast Brazil
Soil organic carbon, microbial biomass and enzyme activities responses to natural regeneration in a tropical dry region in Northeast Brazil
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DOI：
10.1016/j.catena.2016.12.012
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发表时间：
2017-04-01
期刊：
影响因子：
6.2
通讯作者：
Cournac, Laurent
中科院分区：
文献类型：
--
作者：
de Medeiros, Erika Valente;Duda, Gustavo Pereira;Cournac, Laurent
自然再生可能是恢复以前用于集约农业目的的区域的一种经济有效的方法。演替时期的植物多样性已得到充分记录；然而，人们对土壤属性变化的关注较少，而土壤属性的变化可以作为验证再生方法的工具。本研究是更广泛的跨学科研究项目的一部分，该项目评估自然更新对生物多样性和土壤质量的影响。我们研究了自然更新对土壤理化属性以及土壤有机碳（SOC）、微生物量碳（MBC）和酶属性的影响。我们评估了每个自然再生阶段的三个阶段和五个区域（早期 ER、中期 IR 和晚期 LR），分为两层：0-5 和 5-10 cm。本研究发现自然再生使 SOC 增加了 20%。在第一层中，两个较早的自然再生阶段（IR 和 LR）中的 SOC、脲酶、酸性磷酸酶和芳基硫酸酯酶绝对活性显着高于 ER 阶段中的活性。我们发现 ER 区域每 SOC 单位的特定酶活性降低。自然再生影响 SOC 和 MBC、绝对酶活性以及每 SOC 单位的特定酶，主要影响表层。本研究提供了一些有关自然更新对土壤质量有益影响的首批数据，这些数据通过巴西东北部热带干旱地区的酶活性、SOC 和 MBC 进行测量。 (C) 2016 Elsevier B.V. 保留所有权利。
Natural regeneration may be a cost-effective method for recovering areas previously used for intensive agricultural purposes. Plant diversity in the succession periods has been well documented; however, less attention has been paid to the changes in soil attributes, which may work as an instrument for the validation of regeneration methods. The present study is part of a broader interdisciplinary research project assessing the effects of natural regeneration on biodiversity and the quality of the soil. We investigated the effects of natural regeneration on the physicochemical attributes of the soil, as well as on soil organic carbon (SOC), microbial biomass carbon (MBC) and enzyme attributes. We assessed three stages and five areas of each natural regeneration stage (early-ER, intermediate-IR and late-LR) in two layers: 0-5 and 5-10 cm. The present study found a 20% SOC increase due to natural regeneration. In the first layer, SOC, urease, acid phosphatase and arylsulfatase absolute activities were significantly higher in the two older natural regeneration stages (IR and LR) than those found in the ER stage. We found a reduction in specific enzyme activities per SOC unit in the ER areas. Natural regeneration influenced SOC and MBC, the absolute enzyme activities, and the specific enzymes per SOC unit, mainly in the surface layer. The present study provided some of the first data concerning the beneficial effects of natural regeneration on the quality of soil as measured through enzyme activity, SOC and MBC in a tropical dry region in Northeastern Brazil. (C) 2016 Elsevier B.V. All rights reserved.