Influence of Changes in Botanical Diversity and Quality of Wet Grasslands through Phenological Phases on Cow Milk Fatty Acid Composition
| Autor: | Radisav Dubljević, Božidarka Marković, Dušica Radonjić, Milan Marković, Danijela Stešević |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Geography
Planning and Development lcsh:TJ807-830 lcsh:Renewable energy sources Forage Management Monitoring Policy and Law Biology Pasture fatty acids Grassland botanical diversity Animal science Grazing Dry matter lcsh:Environmental sciences chemistry.chemical_classification phenological phase lcsh:GE1-350 geography Biomass (ecology) milk geography.geographical_feature_category Renewable Energy Sustainability and the Environment lcsh:Environmental effects of industries and plants 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences 040201 dairy & animal science lcsh:TD194-195 chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Composition (visual arts) grassland Polyunsaturated fatty acid |
| Zdroj: | Sustainability, Vol 12, Iss 6320, p 6320 (2020) Sustainability Volume 12 Issue 16 |
| ISSN: | 2071-1050 |
| Popis: | Natural pastures in Montenegro, together with natural meadows, are the most important forage source and comprise 95% of the used agricultural area (UAA). The aim of this study was to estimate the changes in grassland biomass, chemical and floristic composition and fatty acid composition in milk of cows grazed on Agrostis stolonifera semi-natural wet grassland in the Central region of Montenegro. Investigation was conducted during three phenological phases: early vegetative, optimal vegetative and full reproductive phase. The chemical composition of the grassland biomass was changed through the phenological phases. A significant increase during the experimental period in the content of dry matter and crude fibers and a decrease in crude protein content were determined. The pasture community consisted of 52 species, belonging to 19 families. The total amount of plant species classified as excellent, very good and good quality was 7.69%, while medium quality plants amounted to 13.46%, low quality plants to 19.23%, valueless plants to 34.62% and toxic plants to 25%. The total quality index was 4.166. The highest quality index of this community was in the second phenological phase, then in the third phase the lowest quality was in the first phenological phase. According to the floristic composition and biomass quality, this lowland pasture can be qualified as being of moderate to good quality. The content of milk fat, protein and solid non-fat (SNF) was increased from the first to the third vegetation phase, but the differences between the phases were not significant (p > 0.05). The content of a majority of saturated fatty acids (SFAs) also increased, while the total content of monounsaturated fatty acids (MUFAs) was high in the second phase and decreased significantly in the third phase. The content of polyunsaturated fatty acids (PUFAs) was constant in the first two phases, while it significantly decreased in the third phase. The highest content of most of MUFAs and PUFAs was obtained in the second phenological phase. The content of fatty acids in the third phase significantly affected (p < 0.05) by the phenological phase. This research contributes to the improvements in the grazing management of wet grasslands as well as the animal performances (milk yield and quality of milk). |
| Databáze: | OpenAIRE |
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