太白贝母接种促生菌对根际土壤无机元素的影响
Effects of inoculation of Fritillaria Taipaiensis P.Y.Li with growth-promoting bacteria on inorganic elements in rhizosphere soil
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摘要: 采集接种5种不同微生物促生菌的太白贝母根茎及其土壤，分析太白贝母根茎及其土壤中10种无机元素的含量及变化规律，揭示接种不同促生菌对其产生的影响.结果表明，接种外源有益微生物对太白贝母根际内AM真菌的侵染强度具有调控（促进）作用.不同促生菌处理的样品中，根茎及土壤中均未检出As、Hg元素，其余8种无机元素含量存在显著性差异（P<0.05），Cc处理组K、Ca元素根茎中含量达到根际土含量的3倍，Mn与Zn元素最大差异达到近5倍.富集系数分析表明，根茎中K、Ca、Mg和微量元素Mn、Zn均有高于土壤的趋势；有害元素Cu、Pb、Cd有低于土壤的趋势.根际土壤中的金属元素含量较低，处于未污染范围内.相关性分析可知，药材、根际土壤、药材与根际土壤元素之间既有协同作用又拮抗作用.Abstract: We collected bulbs and soils of Fritillaria Taipaiensis P.Y.Li inoculated with 5 different growth-promoting bacteria to analyz the content and change rules of 10 inorganic elements in Fritillaria Taipaiensis P.Y.Li and soils, revealing the effects of inoculation with different growth-promoting bacteria. The results showed that the inoculation of beneficial microorganisms from the exogenous can regulate (promote) the infection intensity of AM fungi in the roots of Fritillaria Taipaiensis P.Y.Li. Hg and As elements were not detected both in rhizomes and soil, and all other 8 inorganic elements were detected. There were significant differences(P<0.05) in the contents of the remaining 8 inorganic elements, and the the content of K and Ca in the bulb of the Cc treatment group reached 3 times than the rhizosphere soil, and the biggest difference between Mn and Zn reached nearly 5 times. The analysis of the enrichment coefficient showed that the K, Ca, and Mg in the bulbs tended to be higher than those in the soil; the trace elements Mn, and Zn also tended to be higher than the soil; the harmful elements Cu, Pb, and Cd were lower than the soil. The metal elements in the rhizosphere soil were low and in the unpolluted range. Correlation analysis showed that there are synergistic and antagonistic effects among medicinal materials, rhizosphere soil, medicinal materials and rhizosphere soil elements.
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Key words:
- Fritillaria Taipaiensis P.Y.Li /
- soil /
- harmful metal /
- pollution evaluation /
- promoting bacteria
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