Comportamiento agronomicoy nutricional de genotiposdeBrachiariaspp. manejados con fertilizacion nitrogenada solos y asociados conPueraria phaseoloidesen condiciones de la altillanura colombiana

Facultad de Medicina Veterinaria y Zootecnica. Revista

Otoniel Pérez-López¹  Germán Afanador-Tellez² 

[1] Centro de Investigación Corpoica-La Libertad, Corporación Colombiana de Investigación Agropecuaria. Kilómetro 17, Vía Puerto López, Meta (Colombia).;Departamento de Producción Animal, Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia. Cra 30 No. 45-03. Bogotá (Colombia).

关键词: Acid soils;    pastures;    Altillanura;    nitrogen.;    Suelos ácidos;    praderas;    Altillanura;    nitrógeno.;   

DOI  :  10.15446/rfmvz.v64n3.68694

学科分类：兽医学

来源: Universidad Nacional de Colombia * Facultad de Medicina

【 摘 要 】

The Colombian Altillanura is a microregion that typifies a extensive cattle production system which requires the use of adapted grasses responding to nitrogen fertilization to improve yield and nutritional quality grassland to intensify livestock production systems. The study was conducted at the headquarters Taluma CORPOICA, located at 04 ° 34'25 "west and 71 ° 20'10" north in the town of Puerto López - Meta, under conditions of climate and soil of the Colombian Altillanura. The objective of this study was to determine the agronomic and nutritional behavior of genotypes of Brachiaria brizantha CIAT 16315, 16467, 26990, 26124, 6387 and Mulato II, handled single nitrogen fertilization and associated with the legumePueraria phaseoloides.Design of randomized complete block arrangement in divided stripes, where the plot corresponded to the forage grass strip and the level of nitrogen fertilization was used (N46, N92, and N46 + P. phaseoloides). Accessions with greater biomass production (p<0.001) wereB. brizanthaCIAT 16315 (2040 kgDM.ha -1 ),B. brizanthaCIAT 6387 (2033 kgDM.ha -1 ) andB. brizanthaCIAT 16467 (1864 kgDM. ha -1 ). Treatment grasses + N92 values had significantly (p<0.001) higher in CP (9.55%) and degradability of forage (65.7%) and lower dry matter content (37.05 %%), NDF (61.97%) and FDA (30.55%) compared with the response of grasses fertilized with 46 kgN.ha -1and grasses associated with kudzu and fertilized with 46 kgN.ha -1 . For higher CP content (p <0.001), materialsB. brizanthaCIAT 16315 (8.34%) and CIAT 26124 (8.06%) which did not differ significantly with grazing Mulato II (8.18%). The results demonstrated the importance of nitrogen fertilization on the production and nutritional quality pasturesB. brizantha .

【 授权许可】

Unknown