The persistence of inoculants from year to year in soybean [Glycine max (L.) Merr.] cultivation and the residual benefits in soybean production are pertinent to adopting such practices in sub-Saharan Africa countries such as Ghana. A study was conducted to determine the residual effect of commercial rhizobium inoculants on soybean and selected soil health parameters after three cropping seasons. The experimental design was a split-plot. The main plot consisted of three soybean cultivars (Jenguma, Afayak, and Songda), and the subplot comprised of three peat-based commercial bradyrhizobium inoculants (Biofix, Legumefix, and NoduMax) and an uninoculated control. Assessments were made on nodulation, shoot dry matter (DM), grain yield, grain total N uptake, permanganate-oxidizable carbon (POXC), soil pH, and potentially mineralizable C. Among the soybean cultivars, Afayak produced greater nodule mass on the lateral root and the whole root system compared with the other cultivars. Jenguma and Afayak yielded greater shoot DM relative to Songda. Regarding the inoculants, Biofix increased nodule mass on the lateral root and the whole root system compared with the control. Biofix and NoduMax produced superior grain yield relative to the control. Biofix also produced greater grain yield than Legumefix. A superior pod harvest index and an improved grain total N uptake were produced by Biofix compared with Legumefix and the control. Commercial inoculants enhanced POXC availability at harvest, whereas potentially mineralizable C declined with inoculation treatments. Commercial inoculants (Biofix and NoduMax) enhanced nodulation, grain yield, and selected soil health indicators 3 yr after inoculation.

中文翻译：

---

残留慢生根瘤菌接种对大豆性能和选定土壤健康参数的影响

孕育剂在大豆中的逐年持久性 [ Glycine max (L.) Merr.] 大豆生产中的种植和剩余收益与在加纳等撒哈拉以南非洲国家采用此类做法有关。进行了一项研究，以确定三个种植季节后商业根瘤菌接种剂对大豆和选定的土壤健康参数的残留影响。实验设计是裂区。主小区由三个大豆品种（Jenguma、Afayak 和 Songda）组成，子小区由三种基于泥炭的商业慢根瘤菌接种剂（Biofix、Legumefix 和 NoduMax）和一个未接种的对照组成。对结瘤、枝条干物质 (DM)、籽粒产量、籽粒总氮吸收、高锰酸盐可氧化碳 (POXC)、土壤 pH 值和潜在矿化碳进行了评估。在大豆品种中，与其他品种相比，Afayak 在侧根和整个根系上产生更大的根瘤质量。相对于松达，Jenguma 和 Afayak 产生了更大的枝条 DM。关于接种剂，与对照相比，Biofix 增加了侧根和整个根系的根瘤质量。与对照相比，Biofix 和 NoduMax 的谷物产量更高。Biofix 的谷物产量也高于豆科植物。与 Legumefix 和对照相比，Biofix 产生了优越的豆荚收获指数和改进的谷物总氮吸收。商业接种剂在收获时提高了 POXC 的可用性，而潜在的可矿化 C 在接种处理后下降。商业接种剂（Biofix 和 NoduMax）在接种 3 年后增强了结瘤、谷物产量和选定的土壤健康指标。