Investigating the Importance of Optimal Soil Fertility in the Response of a Legume to Inoculation with Rhizobia
The nutrition of a nodulated legume is different from other plants because of the additional nutritional demand placed on the legume by the N2-fixing nodules. The efficiency of the symbiosis is affected by the levels of the various nutrients in the soil and variability in the response to inoculation. This experiment is designed to compare inoculation response in unamended soil (except for liming) and in soil fertilized to optimal levels. Inoculation response is evaluated using the three basic treatments: (1) inoculated, (2) plus-N without inoculation, and (3) no nitrogen without inoculation. Each of these treatments is set up at two different fertility levels. A multi-strain peat-based inoculant is used to study the effect of soil fertility on the competition of rhizobia for nodulation.
KeywordsZinc Magnesium Agar Urea Glycine
Unable to display preview. Download preview PDF.
- Thies, J.E., P.W. Singleton, and B.B. Bohlool. 1991a. Influence of the size of indigenous rhizobial populations on establishment and symbiotic performance of introduced rhizobia on field-grown legumes. Appl. Environ. Microbiol. 57: 19–28.Google Scholar
- Thies, J.E., P.W. Singleton, and B.B. Bohlool. 1991b. Modeling symbiotic performance of introduced rhizobia in the field by use of indices of indigenous population size and nitrogen status of the soil. Appl. Environ. Microbiol. 57: 29–37.Google Scholar