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首页> 外文期刊>Plant and Soil >Positive and negative impacts of plants on acid production in exposed acid sulphate soils.
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Positive and negative impacts of plants on acid production in exposed acid sulphate soils.

机译:植物对暴露的酸性硫酸盐土壤中酸产生的正面和负面影响。

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This study examined the impact of plants on acid sulphate soils with the aim of determining whether plants are able to reduce acid production. The study was conducted with clayey acid sulphate soil under controlled conditions with treatments lasting up to 24 weeks and measurements made in the top 0-60 mm of soil. pH profiles in the soil were strongly dependent on soil moisture and the pattern of irrigation. When bare soil was allowed to dry down without further irrigation, there was very little acidification of either the surface or subsurface layers. Planting of Phragmites accelerated soil drying and caused extensive cracking and acidification of the subsoil under simulated drought conditions. Under a wetting and drying regime, both Phragmites and a surface spreading grass Paspalum increased soil acidification, while a surface spreading herbaceous shrub Cotula had little effect on acidification. There was no evidence that live plants could ameliorate acid sulphate soils. However, application of dead plant matter to the surface of the soil was effective in reducing acidification, especially if submerged.
机译:这项研究检查了植物对酸性硫酸盐土壤的影响,目的是确定植物是否能够减少酸的产生。该研究是在控制条件下对硫酸黏土酸性土壤进行的,处理持续长达24周,并在土壤顶部0-60毫米处进行了测量。土壤中的pH值在很大程度上取决于土壤湿度和灌溉方式。当允许裸土干燥而不进行进一步灌溉时,表层或地下层几乎没有酸化。在模拟干旱条件下,芦苇的种植加速了土壤干燥,并导致了深层土壤的大量开裂和酸化。在湿润和干燥的条件下,芦苇和表面散布的草Paspalum均增加了土壤酸化作用,而表面分布的草本灌木小草对土壤酸化的影响很小。在酸化。没有证据表明有生命的植物可以改善硫酸盐土壤。然而,将死植物物质施加到土壤表面可有效减少酸化,特别是在淹没的情况下。

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