Effect of nitrogen over corn-grass association in the renovation of pastures at piedmont of the llanos orientales of colombia Report as inadecuate




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Gustavo Adolfo Ligarreto M. ;Agronomía Colombiana 2011, 29 1

Author: Álvaro Rincón C.

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Agronomía Colombiana ISSN: 0120-9965 agrocolfabog@gmail.com Universidad Nacional de Colombia Colombia Rincón C., Álvaro; Ligarreto M., Gustavo Adolfo Effect of nitrogen over corn-grass association in the renovation of pastures at piedmont of the Llanos Orientales of Colombia Agronomía Colombiana, vol.
29, núm.
1, enero-abril, 2011, pp.
91-98 Universidad Nacional de Colombia Bogotá, Colombia Available in: http:--www.redalyc.org-articulo.oa?id=180322573012 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Effect of nitrogen over corn-grass association in the renovation of pastures at piedmont of the Llanos Orientales of Colombia Efecto del nitrógeno sobre la asociación maíz–pastos en la renovación de praderas del piedemonte de los Llanos Orientales colombianos Álvaro Rincón C.1,3, and Gustavo Adolfo Ligarreto M.2 ABSTRACT RESUMEN In the piedmont of the Eastern Plains of Colombia, was established the association of corn with the grasses B.
decumbens, Mulato and Toledo, to renovate degraded pasture.
The effect of the N was evaluated with 100 and 200 kg ha-1 applied to the corn to the 15 and 35 days after the sowing (das).
The available N in the soil in nitrate form remained N in 42 and 43 kg ha-1 to the 15 and 35 das respectively, coinciding with the fertilization of N applied to the corn, but to the 60 days it reducing to 11.9 kg N ha-1.
The available N in ammonium form was of 82, 84 and 72 kg ha-1 to the 15, 35 and 60 das, respectively.
To the beginning of the flowering, the N leaf in the corn associated with B.
decumbens and with the grass, Toledo was respectively of 2.9 and 2.83%, while in the association with grass Mulato was of 2.66%.
The N leaf in the grasses Mulato and Toledo was respectively of 3.31 and 3.20%...





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