Vargas-Ortiz Luis, Andrade-Yucailla Veronica, Barros-Rodríguez Marcos, Lima-Orozco Raciel, Macías-Rodríguez Edis, Contreras-Barros Katherine, Guishca-Cunuhay Carlos
Departamento de Producción Animal, Instituto Superior Tecnológico Benjamín Araujo, Patate 180403, Ecuador.
Centro de Investigaciones Agropecuarias, Universidad Central "Marta Abreu" de Las Villas, Santa Clara 50100, Cuba.
Animals (Basel). 2022 Aug 31;12(17):2250. doi: 10.3390/ani12172250.
In recent years, the worrying generation of GHG from ruminant production has generated widespread interest in exploring nutritional strategies focused on reducing these gases, presenting the use of bioactive compounds (tannins) as an alternative in the diet. The aim of this research was to determine the effect of the addition of different levels of Acacia mearnsii on ruminal degradation, nutrient digestibility, and mitigation of greenhouse gas production. A completely randomized design with four treatments and six repetitions was used. The treatments were: T1, T2, T3, and T4 diets with, respectively, 0%, 20%, 40%, and 60% A. mearnsii. The rumen degradation kinetic and in vitro digestibility, and the production of gas, CH4, and CO2 were evaluated. In situ rumen degradation and in vitro digestibility of DM and OM showed differences between treatments, with T1 being higher (p < 0.05) in the degradation of the soluble fraction (A), potential degradation (A + B), and effective degradation for the different passage rates in percent hour (0.02, 0.05, and 0.08), compared to the other treatments. Rumen pH did not show differences (p > 0.05) between treatments. The lowest (p < 0.05) gas, CH4, and CO2 production was observed in treatments T1 and T2 with an approximate mean of 354.5 mL gas/0.500 g fermented DM, 36.5 mL CH4/0.500 g fermented DM, and 151.5 mL CO2/0.500 g fermented DM, respectively, compared to treatments T3 and T4. Under the conditions of this study, it was concluded that it is possible to replace traditional forages with up to 20% of A. mearnsii, without observing changes in the production of greenhouse gases with respect to the control treatment (0% of A. mearnsii); however, A. mearnsii is not usable because it significantly decreases rumen degradability of DM and OM, which would considerably affect the production in animals.
近年来，反刍动物生产中令人担忧的温室气体排放引发了人们对探索旨在减少这些气体的营养策略的广泛兴趣，提出使用生物活性化合物（单宁）作为日粮中的一种替代物。本研究的目的是确定添加不同水平的黑荆树对瘤胃降解、养分消化率和温室气体排放缓解的影响。采用完全随机设计，有四个处理组，六个重复。处理组分别为：T1、T2、T3和T4日粮，分别含有0%、20%、40%和60%的黑荆树。评估了瘤胃降解动力学、体外消化率以及气体、甲烷和二氧化碳的产生。干物质和有机物质的原位瘤胃降解和体外消化率在处理组之间存在差异，与其他处理组相比，T1在可溶性部分（A）的降解、潜在降解（A + B）以及不同每小时通过率（0.02、0.05和0.08）下的有效降解方面更高（p < 0.05）。处理组之间瘤胃pH值没有差异（p > 0.05）。与T3和T4处理组相比，在T1和T2处理组中观察到最低的（p < 0.05）气体、甲烷和二氧化碳产量，分别约为354.5 mL气体/0.500 g发酵干物质、36.5 mL甲烷/0.500 g发酵干物质和151.5 mL二氧化碳/0.500 g发酵干物质。在本研究条件下，得出的结论是，用高达20%的黑荆树替代传统草料时，相对于对照处理（0%黑荆树），未观察到温室气体产量的变化；然而，黑荆树不可用，因为它会显著降低干物质和有机物质的瘤胃降解率，这会对动物生产产生相当大的影响。
