M. Villarreal-Romero, S. Parra-Terraza, S. Hernández-Verdugo,
T. Osuna-Enciso, P. Sánchez-Peña, A. Angulo-Castro y R. Pinto-Ruiz
Issue:
110-1 (18-33)
Topic:
Plant Production
Keywords:
Cover crops, N2-fixation, nitrogen liberation in the soil.
Summary:
The practice of cultivation of legumes to manure to the soil and benefit to the subsequent crop of economic
interest, need to know the rate of decomposition and release of nitrogen from its produced biomass;
therefore, the objective of this work was to determine the capacity of biomass production, accumulation
and fixation of atmospheric nitrogen of three cultivars of Mucuna pruriens, as well as
determine the pattern of decomposition and release into to the soil. The work was carried out in a Typic Huplustert soil under field conditions of Culiacan Valley, Sinaloa, Mexico. The experimental design was
a split plot in randomized blocks with four replications. The cultivars of mucuna produced similar amount
of biomass and showed comparable capacity for accumulation of nitrogen in their foliage and atmospheric
nitrogen fixation. No significant difference was observed between cultivars, within same incubation
times, in the pattern of decay and release of nitrogen in the soil of their foliage. In all three cultivars
of mucuna was observed that decomposition rate and nitrogen liberation from foliage was,
comparatively to the rest of the incubation times, higher in the first 15 days of incubation applied to
20 cm deep and 15-30 days when applied to the soil surface. The amount of biomass produced, the
amount of nitrogen accumulated in the foliage and the nitrogen fixed from the atmosphere by the
three studied cultivars of Mucuna pruriens, demonstrates its ability to establish itself as ground cover
crops in Culiacan Valley, Sinaloa, Mexico.
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