Browsing by Subject "oats"

The aim of this master’s thesis was to investigate the potential of reducing enteric methane production from dairy cows by replacing barley grain with oat grain on a grass silage-based diet. The effects of grain species on in vitro methane production, digestibility, pH and volatile fatty acid (VFA) production pattern were investigated and a regression analysis was performed to entangle possible methane mitigating mechanisms of oats. The study was conducted in the laboratory at the Department of Agricultural Research for Northern Sweden in the autumn of 2016. An in vitro gas production system was applied, consisting of 16 diets with two replicates, four blanks and three runs, each with a three-day incubation time. The feed material consisted of eight varieties of barley, eight varieties of oats and timothy silage incubated at a grain/silage ratio of 1:1 on a dry matter basis. Rumen fluid was collected from two cannulated Nordic Red dairy cows after morning feeding. Gas sampling was performed at 2, 4, 8, 12, 24, 32 and 48 hours of incubation, meanwhile VFA-sampling, pH-measurements and sampling of incubation residues were performed at 48 hours. Methane production was estimated as predicted in vivo methane production and stoichiometrically predicted methane production. The in vitro digestibility was determined as true dry matter digestibility (TDMD). Content of indigestible neutral detergent fiber (iNDF) was determined by applying a 12-day in situ incubation in two Ayrshire dairy cows. Oats had a higher content of crude protein, neutral detergent fiber (NDF), iNDF and fat compared to barley, whereas barley had a higher content of starch. Replacing barley with oats decreased predicted in vivo methane production by 9% and stoichiometrically predicted methane production by 11%. Variety within grain was not found to have any significant effect on methane production. True DM digestibility and total VFA production were lower in oat-based diets compared to barley-based diets. No significant differences were observed between the diets considering VFA molar proportions. The pH was lower in barley-based diets compared to oat-based diets. True DM digestibility was the best predictor of methane production. Among grain composition parameters, iNDF content was the best predictor of methane production, followed by NDF. Crude fat content also predicted methane production relatively well. Based on the results of this experiment, it can be concluded that replacing barley grain with oat grain in the diet of dairy cows has a potential to lower methane production predicted in vitro. Furthermore, the methane mitigating effect observed in this experiment is at least partly due to the higher fat content and lower digestibility of oats compared to barley.

Achieving goals set for sustainable development and a prosperous life for future generations requires a collective effort, including from people on a private level, national governments, and private organizations alike. Sustainable development is often divided into three pillars, the environmental, economic and social pillars. One sector at the center of this is the agri-food sector, where social sustainability appears to be receiving little attention along its value chains. Oats, a staple product for Finland and Sweden, are considered a sustainable product from environmental and health perspectives, as well as potentially from an economic standpoint, but again social sustainability in the oats value chains is missing from the discussion. This thesis sets out to assess to which extent the social dimension of sustainability is addressed in these oats value chains. Using a mixed methods approach, the thesis explores the different measures used for assessing aspects of social sustainability. Measuring progress in sustainable development is often done through the use of indicators, which many of them are derived from the UN Sustainable Development Goals. Indicators are meant to reveal areas where progress has not been made and policy should be targeted for development. Large organizations are reporting their contributions in annually published sustainability reports. For this, sustainability aspects need to be measurable, which requires converting real-life phenomena into measurable indicators, often quantifiable numbers. This is especially difficult for some social aspects. There is a risk policymaking loses its focus of pursuing development beyond the indicators, but instead is only trying to answer to the indicators. The thesis is applying a qualitative mixed methods approach. First, published sustainability reports are assessed, followed by indepth, semi-structured expert interviews. The research material consists of two published sustainability reports, an unpublished sustainability report comparison document, as well as 11 interviews. The data was gathered in March, April and May 2022. The interviews were analyzed using a qualitative content analysis and divided into themes for analysis. From an objective general standpoint, the oats value chain stakeholders valued all three dimensions of sustainability equally, but through the use of examples of activities the same did not translate into the organizations’ daily activities. Actions and programs were more focused on environmental and economic aspects, and the absence of social sustainability examples in initial responses proposes a slight disregard toward the social dimension. Still, organizations introduced a variety of methods in place for assessing social issues, especially internally. Organizations in the oats value chain are looking to make an impact for a more sustainable future, but measuring performance presents challenges, especially on the social side. Categorizing aspects of social sustainability under different dimensions of sustainability is complicated.