采煤沉陷区不同造林树种恢复土壤酚酸物质对土壤微生物的影响

doi:10.13287/j.1001-9332.201712.019

摘要/Abstract

摘要： 酚酸物质是影响微生物群落和结构的最重要因子之一,研究酚酸物质在不同造林树种土壤中的变化规律及其与微生物群落结构的关系,有助于更好地了解和揭示采煤沉陷区恢复造林条件下微生物群落变化的机制.本研究在双鸭山宝山采煤沉陷区的撂荒地基础上营造三针一阔(红松、落叶松、樟子松和杨树)人工林,测定这4种造林地土壤酚类物质、11种酚酸物质和微生物群落结构.结果表明: 复合态酚含量总体表现为人工林显著高于撂荒地,其中,落叶松人工林和杨树人工林的复合态酚含量较高,落叶松人工林和红松人工林的总酚含量显著高于撂荒地,红松人工林的水溶性酚含量显著高于撂荒地;在11种酚酸物质中,阿魏酸、松香酸、β-谷甾醇、齐墩果酸、莽草酸、亚油酸和硬脂酸的含量在人工林土壤中较高.土壤酚类物质与土壤微生物生物量不存在显著的相关关系,个别的酚酸物质与土壤微生物的相关关系显著,其中,阿魏酸、松香酸和β-谷甾醇对土壤微生物生物量有明显的促进作用,与真菌和真菌/细菌存在显著的正相关关系.杨树人工林的酚酸物质含量较高,说明营造杨树人工林对采煤沉陷区的土壤恢复有益.

Abstract: Phenolic acids are one of the most important factors that influence microbial community structure. Investigating the dynamic changes of phenolic acids and their relationship with the microbial community structure in plantation soils with different tree species could contribute to better understanding and revealing the mechanisms of microbial community changes under afforestation restoration in coal-mining subsidence areas. In this study, plantations of three conifer and one deciduous species (Pinus koraiensis, Larix gmelinii, Pinus sylvestris var. mongolica, and Populus ussuriensis) were established on abandoned coal-mining subsidence areas in Baoshan District, Shuangyashan City. The contents of soil phenols, 11 types of phenolic acids, and microbial communities in all plots were determined. The results showed that the contents of soil complex phenol in plantations were significantly higher than that of abandoned land overall. Specifically, soils in larch and poplar plantations had higher contents of complex phenol, while soils in larch and Korean pine plantations had greater contents of total phenol. Moreover, soil in the P. koraiensis plantation had a higher content of water-soluble phenol compared with abandoned lands. The determination of 11 phenolic acids indicated that the contents of ferulic acid, abietic acid, β-sitosterol, oleanolic acid, shikimic acid, linoleic acid, and stearic acid were higher in plantation soils. Although soil phenol contents were not related with soil microbial biomass, the individual phenolic acids showed a significant relationship with soil microbes. Ferulic acid, abietic acid, and β-sitosterol showed significant promoting effects on soil microbial biomass, and they showed positive correlations with fungi and fungi/bacteria ratio. These three phenolic acids had higher contents in the poplar plantation, suggesting that poplar affo-restation had a beneficial effect on soil quality in coal-mining subsidence areas.

及利, 杨立学. 采煤沉陷区不同造林树种恢复土壤酚酸物质对土壤微生物的影响[J]. 应用生态学报, 2017, 28(12): 4017-4024.

JI Li, YANG Li-xue. Effect of soil phenolic acids on soil microbe of coal-mining depressed land after afforestation restoration by different tree species[J]. Chinese Journal of Applied Ecology, 2017, 28(12): 4017-4024.

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