Fijación biológica de nitrógeno por cuatro fabáceas en suelos ácidos de Tabasco, México
Biological nitrogen fixation is a process that occurs in nature and is the cheapest source of N for humid tropical acid soils. The aim of this study was to quantify the amount of N fixed by species of fabaceae through 15N isotopic techniques, in a savanna soil in Mexico. The treatments were es...
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| Publicado en: | Revista de la Facultad de Ciencias Agrarias |
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| Autores principales: | , , , , , |
| Materias: | |
| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=4948 |
| Sumario: | Biological nitrogen fixation is a process
that occurs in nature and is the cheapest
source of N for humid tropical acid soils. The
aim of this study was to quantify the amount
of N fixed by species of fabaceae through
15N isotopic techniques, in a savanna soil in
Mexico. The treatments were established under
a design of a randomized complete block, with
four replicates. The variables evaluated were:
fresh biomass (FB), dry matter (DM), nodule
number (NN), nodule dry mass (NDM), total
nitrogen (tN) and biologically fixed nitrogen (fN).
Our results show that Mucuna deerengiana L.
had higher production of FB and DM (17.50
and 5.47 Mg ha-1), NDM (58.79 mg plant-1)
and higher content of tN and fN (526.94 and
522.11 kg ha-1) respectively, compared with
Cajanus cajan L., Phaseolus lunatus L. and
Sesbania emerus L., species that showed low
values in these variables. We conclude that
Mucuna deerengiana L. tolerates unfavorable
factors prevailing in acid soils and therefore
has efficiency greater than 500 kg ha-1 fN; we
consider it appropriate to increase the level
of nitrogen in savanna soils, without applying
chemical fertilizers. |
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