• ISSN 1008-505X
  • CN 11-3996/S
曾欣, 刘树元, 李朝辉, 赵守龙, 林梦露, 李晓珊, 刘文莉. 十种湿生植物根际真菌群落参数和土壤肥力的比较[J]. 植物营养与肥料学报, 2015, 21(3): 815-822. DOI: 10.11674/zwyf.2015.0330
引用本文: 曾欣, 刘树元, 李朝辉, 赵守龙, 林梦露, 李晓珊, 刘文莉. 十种湿生植物根际真菌群落参数和土壤肥力的比较[J]. 植物营养与肥料学报, 2015, 21(3): 815-822. DOI: 10.11674/zwyf.2015.0330
ZENG Xin, LIU Shu-yuan, LI Zhao-hui, ZHAO Shou-long, LIN Meng-lu, LI Xiao-shan, LIU Wen-li. Comparison of fungal community parameters and soil fertility of ten macrophyte rhizospheres[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(3): 815-822. DOI: 10.11674/zwyf.2015.0330
Citation: ZENG Xin, LIU Shu-yuan, LI Zhao-hui, ZHAO Shou-long, LIN Meng-lu, LI Xiao-shan, LIU Wen-li. Comparison of fungal community parameters and soil fertility of ten macrophyte rhizospheres[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(3): 815-822. DOI: 10.11674/zwyf.2015.0330

十种湿生植物根际真菌群落参数和土壤肥力的比较

Comparison of fungal community parameters and soil fertility of ten macrophyte rhizospheres

  • 摘要: 【目的】 利用人工湿地是目前我国进行点源污水处理的一项重要技术,人工湿地的湿生植物及其根际微生物对污水处理有重要影响。目前人们普遍关注的是湿生植物根际细菌的群落结构和功能,而对根际真菌群落结构的信息较少。本文主要研究10种湿生植物根际的土壤肥力、真菌数量、生物量和真菌的碳代谢,目的在于筛选出根际土壤真菌生物量和活性均较大的植物种类,为今后人工湿地的建设提供参考依据。【方法】 采用向后抛石法随机选取采样点,收集10种湿生植物根际土壤。采用常规方法测定土壤有机碳、全氮和全磷含量;真菌数量采用稀释平板法,真菌生物量(麦角固醇含量)采用高效液相色谱法(HPLC)测定;真菌碳代谢指纹采用 FF板进行分析。【结果】 银边石菖蒲、花叶香蒲和黄菖蒲根际土壤分别有较高的有机碳、全氮和全磷含量(P0.05)。黄菖蒲根际土壤真菌数量和生物量最大(P0.05)。相关分析表明,土壤全磷与真菌数量和生物量有极显著的正相关关系 (P0.05),是制约土壤真菌分布的重要因素。碳代谢指纹分析表明,水生美人蕉土壤真菌对95种碳源的平均利用活性以及对6种碳源群的利用强度均大于其它植物,土壤全氮显著地影响了真菌群落对碳水化合物的利用(P0.05)。【结论】 10种湿生植物根际土壤肥力和真菌群落有显著性差异,因而土壤肥力和真菌群落可以作为筛选人工湿地植物的重要依据,但这一结论还有待从分子生物学的角度进一步验证

     

    Abstract: 【Objective】 Constructed wetlands(CWs) are often used for treating wastewater from point sources. Macrophytes and their rhizosphere microbes are the most important components in CW systems. Researches have mainly focused on the structure and functions of bacterial communities in CWs, but less on information of fungal communities. This study investigated soil fertility, fungal number, biomass and the carbon metabolic profiles in rhizosphere soils of 10 aquatic plants. The objectives are to select the plant species with greater fungal biomass and higher activity and to provide evidences for better wetland development. 【Methods】 The sampling sites were selected randomly by throwing a piece of stone backwards, and soil samples were collected from macrophyte rhizosphere. Soil organic carbon, total nitrogen and phosphorus contents were determined by using potassium dichromate titration method, Kjeldahldigesting method and Mo-Sb-ascorbic acid spectrophotometric method, respectively; soil fungal number was measured using plate counting method; fungal biomass(i.e. ergosterol content) was measured using high performance liquid chromatography(HPLC) method, and the carbon metabolic profiles of soil fungal communities were analyzed using FF microplates. 【Results】 Acorus gramineus, Typha latifolia and Iris pseudacor rhizosphere soils had higher organic carbon, total nitrogen and total phosphorus content than other plant species respectively (P 0.05). Iris pseudacor rhizosphere soil had greater fungal number and biomass(P 0.05). Correlation analysis showed that the total phosphorus was significantly and positively correlated with the fungi number and biomass(r=0.59 and 0.47 respectively, P0.05), thus it is an important factor that affects soil fungal distribution. The carbon metabolic fingerprint analysis indicated that the capability of soil fungi community to utilize 95 carbon sources and 6 carbon groups in Canna generalis rhizosphere soil was higher than those in other plant rhizosphere soils. Soil total nitrogen content significantly influenced the capacity of fungal communities to utilize the carbohydrate group(r=0.38,P0.05). 【Conclusions】 There was a significant difference in soil fertility and fungi community parameters among the 10 macrophyte rhizosphere soils, so soil fertility and fungi community parameters can be used as the bases for screening macrophytes for construction. However, the fungal species, community structure and diversity need to be further studied from molecular technologies perspective in the future.

     

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