Resumo

ARGUELLO-RANGEL, Jeraldyn; MAHECHA-LEDESMA, Liliana  e  ANGULO-ARIZALA, Joaquín. Nutritional and productive profile of shrub species in tropical lowlands of Antioquia (Colombia). Cienc. Tecnol. Agropecuaria [online]. 2020, vol.21, n.3, e1700.  Epub 31-Ago-2020. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol21_num3_art:1700.

The soils used for livestock in the Bajo Cauca (Antioquia, Colombia) are characterized by having acid pH, low fertility, erosion, compaction, and overgrazing. For this reason, there are deficiencies in nutritional quality and forage production, especially in dry seasons. Therefore, it is necessary to evaluate the use of forage resources adaptable to this area. To compare the nutritional and productive profile of the species Crescentia cujete, Gliricidia sepium, and Tithonia diversifolia, experimental plots were established in Hacienda La Candelaria, using a completely randomized block design with and factorial arrangement. Plant height, green forage and dry matter yield (DM), dry matter content (DM%), neutral detergent fiber (NDF%), acid detergent fiber (ADF%), and crude protein (CP%) were evaluated. An analysis of variance and Tukey’s test were performed with significant differences (p ≤ 0.05) for dry matter yield, with a projected annual production of 13.75 t/ha for Crescentia cujete, 23.2 t/ha for Gliricidia sepium, and 18.47 t/ha for Tithonia diversifolia. Significant differences were found for NDF (p = 0.0349), ADF (p < 0.0001) and CP (p = 0.0037). Crescentia cujete showed the highest NDF (46.5 %) and ADF (25.1 %) contents, whereas Tithonia diversifolia recorded the lowest values (32.6 % NDF and 14.4 % ADF). The CP content was 25.2 % for Tithonia diversifolia, 24.3 % for Gliricidia sepium, and 15.0 % for Crescentia cujete. These results suggest that these species have a potential use in livestock systems in poor soil conditions.

Palavras-chave : Crescentia cujete; forage yield; Gliricidia sepium; sustainable agriculture; Tithonia diversifolia.

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