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首页> 外文会议>International Conference on Environment Materials and Environment Management >The Biotic Resistance of Soil Biota on the invasive Weed Coreopsis Grandiflora Varies with Irradiance Levels
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The Biotic Resistance of Soil Biota on the invasive Weed Coreopsis Grandiflora Varies with Irradiance Levels

机译：土壤生物群对侵袭性杂草花园的生物抗性因辐照水平而异

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摘要

A greenhouse experiment was carried out to study the effects of the sterilization of the soil on the invasive weed Coreopsis grandiflora Hogg. at two irradiance levels. The sterilization was done by benomyl which is a fungicide used worldwide to sterilize the fungal pathogens. The study found that the effects of the sterilization on C. grandiflora varied with the light intensity in terms of the leaf biomass, total biomass and the root-shoot ratio. At high irradiance (60%) the sterilization significantly increased the leaf biomass, total biomass and the ability of photosynthesis of C. grandiflora, suggesting there are soil pathogenic fungi which contribute to biotic resistance against the invasive plants. In contrast, at low irradiance, the sterilization did not have significant effects on the biomass of the plant although the Fv/Fm was significantly increased, suggesting that the light was the key factor and the biotic resistance of soil biota have some minor effects on the plant invasion of C. grandiflora in low light habitat such as forest canopy. The biotic resistance of soil biota on C. grandiflora varies with irradiance levels, suggesting the limiting factors of invasive plants are complex and vary with microhabitats.
机译：进行了一个温室实验，以研究土壤灭菌对侵入性杂草花园的疗效。在两个辐照度水平。苯胺由苯甲基完成，这是全球使用的杀菌剂，以消毒真菌病原体。该研究发现，灭菌对C. Grandiflora的影响随着叶片生物质，总生物质和根芽比而异的光强度变化。在高辐照度（60％）中，灭菌显着增加了C. Grandiflora的叶片生物量，总生物量和光合作用的能力，表明存在对侵入性植物的生物抗性有助于生物致病性的土壤致病性。相比之下，在低辐照度下，灭菌对植物的生物质没有显着影响，尽管Fv / FM显着增加，表明光线是灯光的关键因素，土壤生物群的生物抗性对此植物侵袭C. Grandiflora在森林树冠等低光栖息地。土壤Biota对C. Grandiflora的生物抗性因辐照度水平而变化，表明侵入性植物的限制因素是复杂的，并且与微藻蛋白不同。

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