Laboratoire de Microbiologie des Sols, Institut National de la Recherche Agronomique, Boite Vaguemestre 1540, 21034 Dijon Cedex, France.
Appl Environ Microbiol. 1982 Sep;44(3):583-8. doi: 10.1128/aem.44.3.583-588.1982.
We compared the nodulation competitiveness of three strains of Rhizobium leguminosarum by counting the number of nodules formed on faba bean plants after the application at sowing time of different concentrations of the strains to soils already containing Rhizobium strains of the same species. A relationship of type y = ax was found to exist between the ratio of the nodules formed by the applied inoculum strain to the nodules formed by the soil strains and the ratio of Rhizobium cells in the inoculum to the cells in the soil. This relationship was also confirmed in another competition experiment in which two R. meliloti strains of identical competitiveness were mixed in various proportions. The relationship can also be applied to the majority of results reported in the literature. Should it prove to be more widely applicable, it could be used to estimate the relative competitiveness of Rhizobium strains and thus predict the performance of an inoculum in a given soil.
我们通过在播种时向已含有相同种属根瘤菌的土壤中施加不同浓度的三种根瘤菌菌株，来比较三种豌豆根瘤菌菌株的结瘤竞争能力，然后统计豌豆植株上形成的根瘤数量。我们发现，施加的接种菌株形成的根瘤与土壤菌株形成的根瘤的比例，以及接种菌株中的根瘤菌细胞与土壤中细胞的比例之间存在 y = ax 的关系。在另一个竞争实验中，我们将两种竞争力相同的 R. meliloti 菌株以不同比例混合，也证实了这种关系。该关系也适用于文献中报告的大多数结果。如果它被证明具有更广泛的适用性，它可以用于估计根瘤菌菌株的相对竞争力，从而预测接种剂在特定土壤中的性能。
