Composición química y cinética de degradación ruminal de forraje verde hidropónico de avena a cuatro tiempos de cosecha

Abstract

The aim of this research was to evaluate the effect of the harvest age on the nutritional value of hydroponic green oat forage (HGOF). The research was carried out in the Faculty of Agriculture Sciences of the Technical University of Ambato. The seeds used of oat were of the variety INIAP 82. The planting density was 6.4kg/m2, the chemical fertilization was done covering the nutritional requirements for the cultivation by irrigation water (1L/m2 every 6 h). The experiment was conducted under a completely random design with four treatments (harvest times: T1:8, T2:11, T3:14 and T4:17 days) and six replicates. Were analyzed the following response variables: chemical composition, in vitro digestibility and in situ ruminal degradation of nutrients, this test was performed using the nylon bag in the rumen and six bulls of approximately 450±49 kg of live weight. The results show a greater (P=0.0012) MS content in treatments T2(94.56), T3(95.29) and T4(95.28), with respect to OM, FDA, EB did not show differences between treatments (P>0.05). However, NDF and Ash was higher (P<0.05) in treatments T3 and T4 (45.72 y 47.91, 4.46 y 4.91 respectively) in relation to the other treatments respectively. The potential degradation of DM and OM (A+B) did not show differences between treatments (P>0.05), however, in the effective degradation was greater (P<0.005) en T1 y T2. Regarding the degradation potential (A+B) and effective degradation of the NDF and ADF, they did not show differences between treatments evaluated (P>0.05). In vitro digestibility of DM and OM did not show differences between treatments (P>0.05). Under the conditions of this study it can be concluded that harvest times of FVHA for the feeding of ruminants are between 8 and 11 days, as it contains the highest nutrient content and better ruminal degradation parameter.