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Colonizing vegetation type drives evolution of organic matter in secondary succession in abandoned vineyards
Plant Ecology ( IF 1.7 ) Pub Date : 2020-08-14 , DOI: 10.1007/s11258-020-01069-2
Cristina Vaquero Perea , Inmaculada Valverde-Asenjo , Antonio Vázquez de la Cueva , Juan Pedro Martín-Sanz , José Antonio Molina , José Ramón Quintana

Understanding soil responses to plant colonization is important for managing abandoned lands. We investigated the influence of species colonizing abandoned fields on soil components and properties related to C cycle and limiting nutrients (N, P) over time. A chronosequence was built of vineyards that had been abandoned over the past 50 years. Sixty-nine plots were chosen with different abandonment ages, and the soils in each plot were sampled under the influence of the dominant species in the area present in each one, obtaining a total of 132 samples. Total C and N content and available P content were determined in all these soils. Organic matter was fractionated by acid hydrolysis and three different fractions were differentiated into labile pool I and II and recalcitrant fraction. The soil properties and components with the greatest effect on the stabilization of organic matter were quantified, and the geomorphological factors that may influence these cycles were determined. The abandoned soils accumulated a large amount of C during the secondary post-abandonment succession. The various colonizing species showed differences in the accumulation of C and nutrients in the soils under their influence. Retama sphaerocarpa and Agrostis castellana accumulated more C and N than the rest of the species throughout the chronosequence. Despite the low content of inorganic colloids (clay and free Fe and Mn oxides) in the study soils, minor variations in these contents played a decisive role in stabilizing the organic matter.



中文翻译:

殖民地植被类型驱动废弃葡萄园次生演替过程中有机质的演化

了解土壤对植物定殖的反应对于管理废弃土地非常重要。我们调查了物种在荒地上定居对土壤成分和与碳循环相关的特性以及随着时间的推移限制养分(N,P)的影响。一个按时间顺序排列的葡萄园是在过去50年中被废弃的。选择了69个不同弃耕年龄的样地,在每个样地中优势土壤种类的影响下,对每个样地中的土壤进行了采样,总共获得了132个样本。测定了所有这些土壤中的总碳和氮含量以及有效磷含量。通过酸水解将有机物分馏,并将三个不同的馏分分为不稳定的I和II池和顽re馏分。量化了对有机物稳定影响最大的土壤性质和成分,并确定了可能影响这些循环的地貌因素。在弃耕后的第二次演替中,弃土累积了大量的碳。在其影响下,各种定殖物种在土壤中碳和养分的积累上存在差异。在整个时间序列上,Retama sphaerocarpaAgrostis castellana积累的C和N比其余物种更多。尽管研究土壤中的无机胶体含量低(粘土和游离的Fe和Mn氧化物以及游离的Fe和Mn氧化物),但这些含量的微小变化在稳定有机物方面起着决定性的作用。

更新日期:2020-08-14
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