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以根瘤超着生大豆突变体0498和完全不结瘤的大豆突变体0701为材料,在人工气候室内模拟大气CO2浓度倍增以及UV-B辐射增强的复合逆境胁迫条件,研究其对大豆根际氨氧化细菌数量和根际土壤酶活的影响。结果表明:与对照相比,CO2浓度倍增能显著提高大豆根际氨氧化细菌的数量,增加土壤中脲酶、转化酶、酸性磷酸酶和碱性磷酸酶的活性,对完全不结瘤的0701影响更加显著;UV-B辐射增强对氨氧化细菌数量无显著影响,对土壤酶活存在一定的抑制作用。超量根瘤的存在,使CO2倍增和UV-B辐射增强对上述指标的影响得到一定的缓解。
In this study, rhizobacterium rhizosphere ammonia (rhizosphere ammonia) 0498 and omnidirectional soybean mutant 0701 were used as materials to simulate the combined stress-response conditions of atmospheric CO2 concentration doubling and UV-B radiation enhancement in artificial climate chamber. The number of oxidizing bacteria and rhizosphere soil enzyme activities. The results showed that compared with the control, the doubling of CO2 concentration could significantly increase the number of ammonia oxidizing bacteria in rhizosphere and increase the activity of soil urease, invertase, acid phosphatase and alkaline phosphatase, More significant; enhanced UV-B radiation on the number of ammonia-oxidizing bacteria had no significant effect on soil enzyme activity there is some inhibition. The existence of excess nodules, CO2 doubler and enhanced UV-B radiation on the above indicators have been alleviated.