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首页> 外文期刊>Plant and Soil >Frankia inoculation, soil biota, and host tissue amendment influence Casuarina nodulation capacity of a tropical soil
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Frankia inoculation, soil biota, and host tissue amendment influence Casuarina nodulation capacity of a tropical soil

机译：Frankia接种，土壤生物区系和宿主组织改良影响热带土壤木麻黄的结瘤能力

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摘要

The effects of soil biota, Frankia inoculation and tissue amendment on nodulation capacity of a soil was investigated in a factorial study using bulked soil from beneath a Casuarina cunninghamiana tree and bioassays with C. cunninghamiana seedlings as capture plants. Nodulation capacities were determined from soils incubated in sterile jars at 21 degreesC for 1, 7, and 28 days, after receiving all combinations of the following treatments: +/- steam pasteurization, +/- inoculation with Frankia isolate CjI82001, and +/- amendment with different concentrations of Casuarina cladode extracts. Soil respiration within sealed containers was determined periodically during the incubation period as a measure of overall microbial activity. Soil respiration, and thus overall microbial activity, was positively correlated with increasing concentrations of Casuarina cladode extracts. The nodulation capacity of soils inoculated with Frankia strain Cj82001 decreased over time, while those of unpasteurized soils without inoculation either increased or remained unaffected. The mean nodulation capacity of unpasteurized soil inoculated with Frankia CjI82001 was two to three times greater than the sum of values for unpasteurized and inoculated pasteurized soils. Our results suggest a positive synergism between soil biota as a whole and Frankia inoculum with respect to host infection.
机译：在一项因子分析研究中，研究了土壤生物区系，弗兰基娅接种和组织改良剂对土壤结瘤能力的影响，该研究使用了来自木麻黄树下的膨大土壤，并用C.cunninghamiana幼苗作为捕获植物进行了生物测定。在接受以下处理的所有组合后，从在21摄氏度的无菌广口瓶中培养的土壤中测定结瘤能力：+/-蒸汽巴氏灭菌，+ /-接种Frankia分离物CjI82001和+/-用不同浓度的木麻黄提取物进行修订。在孵育期间定期确定密封容器内的土壤呼吸，以作为整体微生物活性的量度。土壤呼吸作用以及整体微生物活性与木麻黄提取物浓度的增加呈正相关。随着时间的流逝，接种Frankia菌株Cj82001的土壤的根瘤能力降低，而未接种的未经巴氏消毒的土壤的根瘤能力增加或保持不变。用Frankia CjI82001接种的未经巴氏消毒的土壤的平均结瘤能力，比未经巴氏消毒和接种的巴氏消毒土壤的值总和大2至3倍。我们的结果表明，就宿主感染而言，整个土壤生物区系与Frankia接种物之间具有积极的协同作用。

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