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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Jimmy Ocaña Reyes1, Sady García Bendezú1 and Amelia Huaringa Joaquín2
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DOI:10.17265/2161-6264/2016.02.002
Affiliation(s)
1. Academic Department of Soils, Agronomy Faculty, La Molina State University, Lima 12, Peru
2. Academic Department of Fitotecnia, Agronomy Faculty, La Molina State University, Lima 12, Peru
ABSTRACT
Molybdenum (Mo) and Cobalt (Co) play an important
role in nitrogen (N) metabolism of grain
legumes. Their applications to alkaline soils have been scarcely studied. A field experiment was set up to evaluate the Mo and Co application in
common bean cv. Canario Centenario under two fertilization
systems: inorganic fertilization and inoculation with Rhizobium etli. In each system, Mo and Mo + Co were applied by seed impregnation at doses of
1.36 g/kg of seed for Mo and
0.26 g/kg of seed for Co; a
control for each fertilization system and an absolute control were included. Yield
components, nodules characteristics and N content by grains and foliage were
evaluated. A completely randomized block design with seven treatments and five replications was used. Mo application increased
the grain yield, grain
size, nodulation and N accumulation in
grains under both fertilization systems. Mo increased the total N uptake by the
plant in 35.4% and 26%, for N
fertilized and inoculated plants, respectively. Co
application increased only nodules number and weight, and N content under inoculation. Mo application to beans cultivated in
alkaline soils is recommended, but Co application
is suitable only when beans are inoculated with rhizobia.
KEYWORDS
Mo, Co, N fertilization, Rhizobium etli, N content.
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