Arbuscular mycorrhiza in relation to management history, soil nutrients and plant species diversity

摘要: Thelow nutrient status of semi-natural grasslands, pastures and meadows,reflects a continuity reduction by grazing hay-making. Ithas been hypothesized that the depletion itself may reduce competitionbetween individuals, mycorrhiza smooths out differences in nutrientuptake competitive ability, so competition for nutrients is evenfurther reduced. This interaction between site history, andmycorrhiza could thus be one explanation high species diversity usuallyfound grasslands. To determine variation colonizationof arbuscular mycorrhizal fungi (AM), three species(Achillea millefolium L., Ranunculusacris L. Anthriscus sylvestris L.) weresampled at sites with different management history. All hadmycorrhizal colonization. Correlations patterns atdifferent spatial scales (0.04,1 total number site) andmycorrhizal colonization were examined. In addition, soil samples analysedconcerning P, K, N pH. When combining measures speciestogether there significantly higher AM longcontinuous regime, compared to short or interruptedmanagement regime. A positive correlation was also found betweenplant mycorrhiza. Soil androot weight density did not differ among managementregime. indicates increasing status, root competition, arenot likely causal mechanisms behind reduced rate withshort interrupted The diversityis more result itself. long continuousmanagement associated an likelihood successful dispersalof plant as well fungal species.