TITLE:
Maize Crop N Uptake from Organic Material of Gliricidia sepium Coinoculated with Rhizobium and Arbuscular Mycorrhizal Fungus in Sub-Saharian Africa Sandy Soil
AUTHORS:
Adama Diouf, Malick Ndiaye, Mame Arama Fall-Ndiaye, Tahir Abdoulaye Diop
KEYWORDS:
Arbuscular Mycorrhizal Fungus, Green Manure, Maize, Nitrogen, Rhizobium
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.3,
February
7,
2017
ABSTRACT: The effect of green manure of gliricidia (Gliricidia sepium (Jacq.) Walp) leguminous plants applied for
cereal maize cultivation and N uptake by cereal were investigated and analyzed
in relation to influence of dual inoculation of gliricidia with microbial
symbionts. Two pot experiments were conducted in greenhouse. The first trial
was set up to enhance growth of gliricidia with exotic and indigenous rhizobial
strains and arbuscular mycorrhizal fungus and the second to determine the
effect of gliricidia organic material on maize growth. Direct 15N-labelling
techniques were used to estimate N-fixed by gliricidia plant and N uptake of
maize cereal crop from green manuring was calculated. Growth of gliricidia trees estimated by
aboveground biomass production and N fixed were positively affected by dual
inoculations. This study showed that shoot dry weight and N accumulation of
maize cultivated under gliricidia green manure were influenced by its
application and indirectly by microbial treatments. The N recovery by the maize
accounted 17.32% to 26.52% of N applied as gliricidia organic material.
Gliricidia green manure N accumulation and release, and afterward microbial
inoculations were substantially determining on maize crop N uptake and growth
in sandy soil of Sub-Saharian Africa.