Aziz T, Habte M
Department of Agronomy and Soil Science, University of Hawaii, Honolulu, Hawaii 96822, USA.
New Phytol. 1989 Nov;113(3):353-357. doi: 10.1111/j.1469-8137.1989.tb02413.x.
An experiment was conducted in the greenhouse to determine the effectiveness of three species of vesicular-arbuscular (VA) mycorrhizal fungi in an oxisol subjected to simulated erosion using cowpea [Vigtta unguiculata (L.) Walp, cv.'California Black Eye'] as an indicator host. Inoculation of the eroded soil resulted in increased VA mycorrhizal colonization of roots without enhancing shoot P concentration and dry matter yields. Inoculation of the uneroded soil, however, led to significant improvement in infection level as well as in symbiotic effectiveness. Based on the results of this study, it appears that the lack of expression of mycorrhizal effectivness in the eroded soil is a result of nutrient deficiency. The results thus suggest the importance of restoring lost nutrients before the benefits of VA mycorrhizal inoculation could be effectively exploited for a successful establishment of a mycorrhizal cowpea in eroded soils.
在温室中进行了一项实验，以确定三种泡囊-丛枝（VA）菌根真菌在模拟侵蚀的氧化土中的有效性，该氧化土以豇豆[Vigtta unguiculata (L.) Walp, cv.'California Black Eye']作为指示宿主。对侵蚀土壤进行接种导致根部VA菌根定殖增加，但未提高地上部磷浓度和干物质产量。然而，对接种未侵蚀土壤，感染水平以及共生有效性均有显著改善。基于本研究结果，侵蚀土壤中菌根有效性缺乏表现似乎是养分缺乏的结果。因此，这些结果表明，在侵蚀土壤中成功建立菌根豇豆之前，在有效利用VA菌根接种的益处之前，恢复流失养分的重要性。
