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首页> 外文期刊>Landbauforschung >Soil organic matter alterations by short-term composted coffee pulp waste: evidence from pyrolysis-field ionisation mass spectrometry
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Soil organic matter alterations by short-term composted coffee pulp waste: evidence from pyrolysis-field ionisation mass spectrometry

机译：短期堆肥咖啡浆废物对土壤有机物的改变：热解场电离质谱法的证据

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摘要

This study investigates the impact of compost from coffee pulp waste on the composition of soil organic matter (SOM) under controlled laboratory conditions. Compost samples were collected after the thermophilic, mesophilic and the final phase and an equivalent of 48 t ha~(-1) was added to samples of a tropical Nitisol.The soil-compost-mixtures were incubated aerobically for 14 weeks. At the end of incubation the C_(org) concentrations and the total ion intensities ofpyrolysis-field ionization mass spectrometry (Py-FIMS) were larger in compost treatments than in the control. Despite of similar initial organic C_(org) and N_t contents among compost amended treatments, less organic C was mineralized following the application of compost from the thermophilic than from later composting phases. The SOM in the soil that received the "thermophilic" compost contained significantly higher proportions of carbohydrates, heterocyclicitrilic N-compounds, peptides, sterols andn-fatty acids than the other amended soils. Temperature-resolved volatilization curves for carbohydrates, N-compounds and peptides showed that the enriched compounds covered a wide range of thermal stability. In conclusion, the compost from the thermophilic phase had the best effect in terms of biologically labile C sequestration and stabilization of native organic C in a clay-rich tropical Nitisol. If confirmed for other composts and soils, this may have also considerable economic implications becausethe time period of composting can be shortened.
机译：这项研究调查了在受控实验室条件下咖啡浆废料堆肥对土壤有机物（SOM）组成的影响。在高温，中温和最终阶段后收集堆肥样品，并将相当于48 t ha〜（-1）的样品添加到热带尼提索尔的样品中。将土壤-堆肥混合物进行需氧培养14周。孵育结束时，堆肥处理的C_（org）浓度和热解场电离质谱（Py-FIMS）的总离子强度比对照大。尽管在堆肥改良处理中初始有机C_（org）和N_t含量相似，但从高温堆肥中施用有机堆肥后，其有机C的矿化程度要比后期堆肥阶段的要低。与其他改良土壤相比，接受“嗜热”堆肥的土壤中的SOM所含碳水化合物，杂环/硝酸N化合物，肽，固醇和正脂肪酸的比例要高得多。碳水化合物，N化合物和多肽的温度分辨挥发曲线表明，富集的化合物具有广泛的热稳定性。总而言之，在富含粘土的热带尼提索尔中，热固性堆肥在生物不稳定的碳固存和稳定天然有机碳方面具有最佳效果。如果经确认可以用于其他堆肥和土壤，这也可能具有相当大的经济意义，因为可以缩短堆肥的时间。

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