沙枣类植物已被前人证明具有根瘤,是一种很好的固氮树种。广泛分布于我国西北、东北各地。经调查,在新疆、甘肃、宁夏、辽宁各地都受到褐斑病菌(Septoria argyraeaSacc.)的危害。罹病植株其病害轻重与根瘤形成的数量有关,即发病重的植株除其地上部分生长不良外,根系发育也差,根瘤少。为了了解病害对固氮作用的影响,笔者作了根瘤的固氮活性测定及植株含氮量分析。本文为分析结果报告。 Ears jujube plants have been proven to have nodules, is a good nitrogen-fixing species. Widely distributed in China’s northwestern and northeastern provinces. After investigation, it is endangered by Septoria argyraea Sacc. In Xinjiang, Gansu, Ningxia and Liaoning. Diseases of diseased plants and the severity of the number of nodules, that is, the incidence of heavy plants in addition to their above-ground part of poor growth, root development is poor, fewer nodules. In order to understand the impact of disease on nitrogen fixation, the author made a determination of nitrogen fixation activity of nodules and plant nitrogen content. This article is the analysis of the results reported.