不同土壤和植被生境下生物结皮对土壤性质的影响
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张健(1980-),男,博士,副教授,主要从事微生物生态研究。E-mail:zhangjian12102@163.com

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黄土高原土壤侵蚀与旱地农业国家重点实验室开放研究基金项目(A314021402-1715);国家自然科学基金项目(31660150,31860037);贵州省科技厅项目(黔科合基础[2017]1059号,黔科合支撑[2018]2773号,黔科合平台人才[2017]5788号);贵州省生物学一流学科建设项目(GNYL[2017]009)


Effects of Biological Crusts on Soil Properties Under Different Soil and Vegetation Habitats
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    摘要:

    生物结皮作为干旱和半干旱地区重要的生物组分,对该区域生态过程中的生物地球化学循环产生重要的影响。以陕北水蚀风蚀交错区的生物结皮为研究对象,调查该区域2种土壤(黄绵土和风沙土)和3种植被(长芒草、油蒿和小叶杨群落,以农田为对照)生境下生物结皮对土壤性质的影响。结果表明:(1)结皮层与结皮下层0-10 cm各土壤性质指标的变化存在显著差异(p<0.05);(2)3种植物群落生境下结皮层各土壤性质指标的变化差异不显著,表明结皮层内生物结皮生态功能作用是结皮层土壤性质的主导影响因素;(3)3种植物群落生境0-10 cm土层的土壤性质如C、N、C/N、Mg、Mn、δ13C和δ15N等指标变化存在显著差异(p<0.05),但风沙土油蒿和小叶杨群落生境下所有调查的土壤性质指标间均无显著差异,这表明样地间0-10 cm土层土壤性质差异的主要是受到土壤类型自身特性的影响;(4)不同植被和土壤生境下的结皮层和0-10 cm样品间的空间排序分异明显,表明土壤性质间的差异依赖于生境下多因素的综合作用,生物结皮、土壤类型和植被是预测该区域表层土壤空间异质性的重要因素。

    Abstract:

    As an important biological component in arid and semi-arid regions, biological soil crusts (BSCs) have an important influence on biogeochemical cycle in the ecological process of the region. The effects of biological crust on soil properties under two soil types (loess soil and aeolian sand soil) and three vegetation communities (Stipa bungeana, Artemisia ordosica and Populus simonii communities, farmland as the control) were studied. The results showed that:(1) There was a significant difference among soil physical and chemical properties between BSC layer and 0-10 cm layer (p<0.05). (2) There was no significant difference in soil properties under the three plant community habitats. (3) Soil properties, such as C, N, C/N, Mg, Mn, δ13C and δ15N, and so on, showed the significant differences in the 0-10 cm soil layer under the three plant community habitats, but there no significant difference in soil properties under aeolian sand soil between A. ordosica community and P. simonii community, which indicated that the difference of soil properties in the 0-10 cm soil layer among sampling sites was mainly affected by the characteristics of the soil type itself. (4) The spatial ordering and variations between BSC layer and 0-10 cm layer samples under different vegetation community and soil type habitats were obvious, indicating that the differences in soil properties were dependent on the comprehensive effect of multiple factors in the habitat. Soil type, vegetation and biological crust were important factors for the prediction of spatial heterogeneity of surface soil in this region.

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张健, 徐明, 邹晓, 许明祥.不同土壤和植被生境下生物结皮对土壤性质的影响[J].水土保持学报,2019,33(5):323~328

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  • 收稿日期:2019-03-31
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  • 在线发布日期: 2019-10-21
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