ABSTRACT

Cancer bush (Sutherlandia frutescens), which is facing extinction, can be conserved through cultivation using best agricultural practices that include nodulation with effective rhizobia bacteria. The objective of the study was to compare the efficacy of commercial and native nodulation bacteria on productivity of S. frutescens over two seasons. Seasonal interaction on productivity variables was not significant (P < 0.05), with pooled data (n = 75) subjected to analysis of variance. Treatments had a significant effects on plant variables, contributing from 58 to 91% in total treatment variation (TTV) of the variables. Relative to untreated control, commercial strains significantly increased plant variables from 31 to 44%, whereas wild strains increased the variables from 17 to 195%. Similarly, both commercial and native strains significantly increased nitrogen, protein and symbiotic efficiency, with magnitudes of native strains being significantly higher than those of commercial strains. Treatments had no significant effects on K and protein in leaf tissues of S. frutescens. In conclusion, the native strains as investigated in the current study have the potential for use in the husbandry of cancer bush.

摘要

面临灭绝的癌症灌木（Sutherlandia frutescens）可以通过使用最佳农业实践（包括用有效的根瘤菌结瘤）进行栽培来保护。该研究的目的是比较商业和本地结瘤细菌在两个季节对S. frutescens生产力的功效。生产力变量的季节性交互作用不显着（P  < 0.05），汇总数据（n = 75) 进行方差分析。处理对植物变量有显着影响，对变量的总处理变异 (TTV) 有 58% 至 91% 的贡献。相对于未处理的对照，商业菌株显着增加植物变量从 31% 到 44%，而野生菌株增加变量从 17% 到 195%。同样，商业和天然菌株都显着提高了氮、蛋白质和共生效率，天然菌株的数量显着高于商业菌株。处理对果香叶组织中钾和蛋白质的影响不显着。总之，本研究中调查的天然菌株具有用于饲养癌症灌木的潜力。