Evaluación de la productividad, potencial forrajero y rentabilidad de graminias forrajeras de corte en asociación con Centrosema pubescens Benth en el piso bajo del cantón Gonzanamá

The main alternative to solve the drastic reduction of food during the dry season is the implementation of cutting forage grasses, which increase biomass with adequate nutritional quality, the research aimed to evaluate productive parameters, forage potential and profitability of cutting forage grasses with the association of a legume Centrosema pubescens Benth (Centrosema) on the ground floor of the Canton Gonzanamá. A Completely Random Blocks Design (DBCA) was established, with 6 treatments and 6 repetitions. T1 (Purple King Grass + Centrosema), T2 (Elephant Pasture + Centrosema), T3 (Cuba 22 + Centrosema), T4 (Purple King Grass), T5 (Elephant Pasture) and T6 (Cuba 22). Variables such as height, number of leaves and stems, length and width of the leaves, leaf area index, biomass production, nutritional quality, digestibility in situ, kinetic energy, palatability and profitability were evaluated. For the statistical comparisons the InfoStad program was used, through analysis of variance and Tukey tests at (p <0.05) of significance; the highest height reached T2 with 2.87 m at 128 days after sowing (Age: 45 DDCI), the highest number of leaves presented T5 with 336.65 leaves/tillers and stems increased with 43.9 stems/tillers; on the other hand, the greater length of the leaves showed the T1 with 1.09 m and 1.21 m, in the width of the leaves the highest value obtained the T6 with 4.2 cm, 4.3 cm and 4.9 cm at 98, 113 and 128 days after sowing, and with a leaf area of 1.74 cm2, 3.37 cm2 and 4.33 cm2. Regarding nutritional quality, in general terms the six treatments (T1, T2, T3, T4, T5 and T6) did not show significant differences at (p <0.05) presenting similar percentages of crude protein. As for the kinetic energy of the in situ ruminal degradability of dry matter, the six treatments (T1, T2, T3, T4, T5 and T6) in fraction (b) the most degradable forage grass was T3 with 72, 67%, at 48 hours for each in the incubation times (0, 6, 12, 24, 48 and 96 hours) all pastures are degraded at the same time of incubation, declining at 96 hours, leaving the insoluble. Both cultivars obtained higher estimated yields in forage see you presented T3 and T6 with 124 735 kg/FV/ha/cut and 123 595 kg/FV/ha/cut, with a net profitability index (Profit/Cost) a ratio of $ 2,36 being the most profitable when it comes to implementing cutting grass grasses. Key words: Productivity, cutting forage grasses, forage potential, degradability, digestibility in situ and profitability.

• Autore principale: Carrión León, Janeth Margarita (author)
• Natura: bachelorThesis
• Lingua: spa
• Pubblicazione: 2019
• Soggetti: GRAMÍNEAS FORRAJERAS; CALIDAD PROTEICA; PRODUCTIVIDAD
• Accesso online: http://dspace.unl.edu.ec/jspui/handle/123456789/22476