Resumo

NAVARRO, G et al. ¿Los cultivos de cobertura pueden modificar el patrón de nodulación de soja (Glycine max L.)?. RIA. Rev. investig. agropecu. [online]. 2015, vol.41, n.1, pp.47-52. ISSN 1669-2314.

Soybean nodulation could be modified by factors such as quality of crop residues, inoculation and fertilization. A trial was performed in EEA INTA Marcos Juárez with randomized block design with three replications for evaluated the effect of different winter soil management: (R),rye (Secale Cereale L), (V) hairy vetch (Vicia villosa) and control (C) without cover crops (CC) in soybean nodulation. In soil nitrate content (NC) at sowing, R2 and R5 stages was determined, while in soybean plant C/N ratio of soil residues, number of nodules (NN), weight of nodules (WN), soybean dry matter (DM) and soybean nitrogen content (SNC) in R2 and R5 stage was determined. Results were statistically evaluated by analysis of variance and linear regression analysis. CC was not modified the soil nitrate content, DM or SNC in R2 or R5 stages. The C/N ratio of crops residue in V was low 25 at R2 and R5 stages. CC was not modified WN, but changes in NN were observed. A negative relationship between SNC and NN were observed. Thus, legume CC might be modified soybean nodulation.

Palavras-chave : Rye; Hairy vetch; Residue.

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