In this study, we aimed to assess the influence of land use and management on the fertility characteristics and pedogenic indicators of volcanic soils. Our study area was a mountainous area located in West Sumatra, Indonesia, where local farmers intensively cultivate vegetables by applying high amounts of chemical fertilizers and agrochemicals. Some negative impacts of conventional management were observed in the vegetable fields: soil acidification and loss of organic matter, with descended soil pH and increased acidity as well as decreased contents of exchangeable bases and with decreased amount of organic C. These impacts were not effectively mitigated by positive factors such as increased P availability and decreased capacity for P fixation. Continued cultivation over the years compounded the effects of these changes. Organic farming was advantageous in terms of soil fertility maintenance as it alleviated negative impacts compared to conventional farming. Natural fallow was effective in replenishing soil fertility as indicated by a significant increase in organic C, total N, and exchangeable Ca and Mg contents compared to the vegetable fields. The degree of replenishment was enhanced with a longer period under fallow; however, the natural fallow decreased P availability and increased P fixation capacity. Calliandra calothyrsus fallow further accelerated soil acidification, regardless of the rapid increase in the organic C and exchangeable bases contents. The adverse effects of Calliandra fallow were associated with the formation of humus–aluminum complexes to an extent that it changed from Sil-andic to Alu-andic Andosols.

在这项研究中，我们旨在评估土地利用和管理对火山土壤肥力特征和成岩指示物的影响。我们的研究区域是位于印度尼西亚西苏门答腊的山区，当地农民通过使用大量的化肥和农用化学品来集约种植蔬菜。在菜田中观察到了常规管理的一些负面影响：土壤酸化和有机质流失，土壤pH降低，酸度增加，可交换碱的含量降低，有机碳含量降低。这些影响没有得到有效缓解。积极因素，例如增加的磷利用率和固定磷的能力下降。这些年来的持续耕种使这些变化的影响更加复杂。有机耕作在保持土壤肥力方面是有利的，因为与传统耕作相比，有机耕作减轻了负面影响。天然休耕有效地补充了土壤肥力，有机蔬菜中的碳，总氮以及可交换的钙和镁含量与菜地相比有了显着提高。休养期延长，补给度提高；然而，自然休耕减少了磷的有效性并增加了磷的固定能力。休耕期延长，补给度提高；然而，自然休耕减少了磷的有效性并增加了磷的固定能力。休耕期延长，补给度提高；然而，自然休耕减少了磷的有效性并增加了磷的固定能力。不管有机碳和可交换碱的含量如何迅速增加，Calliandra calothyrsus休耕都进一步加速了土壤酸化。卡里安德拉休闲地的不良影响与腐殖质-铝复合物的形成有关，其程度从硅化-安迪奇改变为铝化-安迪欧溶胶。