Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Kentucky (9522)
- University of Nebraska - Lincoln (1408)
- University of South Florida (620)
- Utah State University (606)
- University of Texas Rio Grande Valley (436)
-
- Old Dominion University (339)
- University of Arkansas, Fayetteville (293)
- Department of Primary Industries and Regional Development, Western Australia (266)
- Western Kentucky University (174)
- University of Nevada, Las Vegas (142)
- Portland State University (140)
- Boise State University (129)
- University of New Hampshire (128)
- Montclair State University (125)
- University of South Carolina (110)
- City University of New York (CUNY) (107)
- TÜBİTAK (107)
- Louisiana State University (105)
- Western Michigan University (98)
- South Dakota State University (93)
- University of Dar es Salaam (86)
- Missouri University of Science and Technology (84)
- University of Colorado Law School (84)
- The University of Southern Mississippi (78)
- University of North Dakota (74)
- Wright State University (71)
- University of Texas at El Paso (68)
- Chapman University (62)
- Universitas Padjadjaran (61)
- China Coal Technology and Engineering Group (CCTEG) (60)
- Keyword
-
- Grazing (393)
- Nitrogen (272)
- Climate change (237)
- Alfalfa (203)
- Soil (187)
-
- Grassland (174)
- Biodiversity (167)
- Sheep (167)
- Forage (164)
- Phosphorus (164)
- Western Australia (164)
- Pasture (159)
- Cattle (156)
- Water quality (154)
- Digestibility (146)
- Yield (141)
- Forage quality (137)
- Silage (137)
- Sustainability (126)
- Remote sensing (122)
- Legumes (120)
- Nutritive value (120)
- Groundwater (119)
- Hydrology (118)
- Geology (115)
- Stocking rate (115)
- Trifolium repens (113)
- Intake (112)
- Management (112)
- Drought (109)
- Publication Year
- Publication
-
- IGC Proceedings (1977-2023) (9261)
- United States Geological Survey: Staff Publications (519)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (371)
- International Journal of Speleology (339)
- Memorandum (315)
-
- Theses and Dissertations (247)
- Faculty Publications (214)
- Department of Earth and Atmospheric Sciences: Faculty Publications (184)
- OES Faculty Publications (158)
- Electronic Theses and Dissertations (147)
- Graduate Theses and Dissertations (146)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (121)
- School of Natural Resources: Dissertations, Theses, and Student Research (118)
- Bulletin of the University of Nebraska State Museum (1924–2023) (112)
- USF Tampa Graduate Theses and Dissertations (110)
- Masters Theses (109)
- Turkish Journal of Earth Sciences (107)
- School of Geosciences Faculty and Staff Publications (98)
- Tanzania Journal of Science (86)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (83)
- Geosciences Faculty Publications and Presentations (79)
- OES Theses and Dissertations (77)
- United States Geological Survey: Publications (69)
- Open Access Theses & Dissertations (65)
- Master's Theses (64)
- Masters Theses & Specialist Projects (64)
- Journal of the Arkansas Academy of Science (63)
- United States Environmental Protection Agency: Publications (63)
- Jurnal Kultivasi (61)
- Coal Geology & Exploration (60)
- Publication Type
- File Type
Articles 5641 - 5670 of 17799
Full-Text Articles in Entire DC Network
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 2. Trace Minerals, G. H. R. Shadnoush
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 2. Trace Minerals, G. H. R. Shadnoush
IGC Proceedings (1977-2023)
The principal factors limiting the performance of grazing animals are low protein content of grasses, low energy intake due to high fibre content and mineral deficiencies or imbalances (McDowell, 1985). At least 26 mineral elements are required by at least one animal species (Church et al., 1988). These elements are generally required in small amounts. They have a great deal of importance for body tissue growth as well as for physiological functions. Mineral deficiencies and imbalances have been reported from almost all tropical regions of the world. This study was designed to measure the copper, iron, manganese and zinc …
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 1. Some Macro Minerals, G. H. R. Shadnoush
Mineral Status Of Some Permanent Range Plants For Grazing Sheep In Semi-Arid Areas Of The Chaharmahal And Bakhtiari Province In Iran. 1. Some Macro Minerals, G. H. R. Shadnoush
IGC Proceedings (1977-2023)
A deficiency of one or more of the essential minerals in animals can lead not only to a decrease in productivity but also to metabolic diseases in case of severe deficiencies (McDowell, 1985). In general, mineral, especially phosphorous, deficiencies and imbalances are reported from almost all tropical regions of the world (Matijovic & Durackova, 1994). This study was designed to measure the calcium, phosphorous, magnesium, potassium, sodium and chlorine contents of some plant species in the semi-arid rangeland of Chaharmahal & Bakhtiari Province in Iran, because little information is available at present.
The Effect Of Two Magnesium Fertilisers, Kieserite And Mgo, On Herbage Mg Content, M. B. O'Connor, A. H. C. Roberts, R. Haerdter
The Effect Of Two Magnesium Fertilisers, Kieserite And Mgo, On Herbage Mg Content, M. B. O'Connor, A. H. C. Roberts, R. Haerdter
IGC Proceedings (1977-2023)
Supplementing Mg to dairy cows is widely practised in New Zealand. Various methods are used including drenching, pasture dusting, water trough treatment and adding to hay, silage and other feedstuffs (Young et al., 1979). Fertiliser Mg (calcined magnesite, MgO) is widely used to maintain soil Mg status but research has shown that using fertiliser Mg to achieve good soil, pasture and animal Mg status requires large inputs of Mg (120 kg/ha) and maintaining blood serum Mg status in dairy cows tends to be short-lived without further animal supplementation (O'Connor et al., 1987). The objective of these experiments was …
Potassium Content And The Balance Between Potassium And Other Minerals And Crude Protein In Forage Can Have A Big Impact On Dairy Cow Health, Hary Eriksson
IGC Proceedings (1977-2023)
Preliminary studies indicated that the mineral balance in forage may affect dairy cow health. A bigger study covering the four most northern counties in northern Sweden was conducted. The objective of this study was to compare data on harvested forage with farm data on milk yield and animal health.
Distribution Of Trace Elements In Plant Parts Of Red Clover (Trifolium Pratense L.), S. Ignjatovic, Z. Lugic, D. Sokolovic, J. Radovic
Distribution Of Trace Elements In Plant Parts Of Red Clover (Trifolium Pratense L.), S. Ignjatovic, Z. Lugic, D. Sokolovic, J. Radovic
IGC Proceedings (1977-2023)
There is little information on the distribution of minerals in plant parts although factors affecting mineral content in forages have been well investigated (Fleming, 1973; Whitehead et al., 1985). The aim of this investigation was to determine the trace mineral content in plant parts of different cultivars of red clover (foreign and domestic) and to assess differences between cultivars. The existence of significant differences between cultivars would indicate the possibility of selecting cultivars to satisfy particular animal requirements for minerals.
Use Of Green Sulla Forage For Feeding. 2. Effects On Lamb Carcass And Meat Quality, A. Bonanno, M. L. Alicata, G. Tornambè, F. Mazza, G. Di Miceli, D. Giambalvo
Use Of Green Sulla Forage For Feeding. 2. Effects On Lamb Carcass And Meat Quality, A. Bonanno, M. L. Alicata, G. Tornambè, F. Mazza, G. Di Miceli, D. Giambalvo
IGC Proceedings (1977-2023)
Diets with 2.5% of condensed tannins (CT) from carob pulp have been showed to reduce lamb carcass weight, yield and fatness, as a consequence of lower digestibility due to strong protein-tannin bonds. Moreover the diets lightened meat colour and negatively affected meat sensory properties (Priolo et al., 2000). There is evidence that some tannin-rich legumes have weaker stability of the protein-tannin complex post-rumen (McSweeney et al., 2001). Since the CT-containing sulla (Hedysarum coronarium L.) demonstrated improved lamb growth performance in comparison with CT-lacking annual ryegrass (Lolium multiflorum Lam. subsp. wersterwoldicum) (Giambalvo et al., 2005), …
Use Of Green Sulla Forage For Feeding. 1. Effects On Lamb Growth And Gastrointestinal Nematode Parasite Infestation, D. Giambalvo, A. Di Grigoli, M. L. Alicata, B. Formoso, A. S. Frenda, P. Trapani
Use Of Green Sulla Forage For Feeding. 1. Effects On Lamb Growth And Gastrointestinal Nematode Parasite Infestation, D. Giambalvo, A. Di Grigoli, M. L. Alicata, B. Formoso, A. S. Frenda, P. Trapani
IGC Proceedings (1977-2023)
Recent studies have shown that some forage legumes containing condensed tannins (CT), such as sulla (Hedysarum coronarium L.), can reduce the gastrointestinal nematode burden in sheep (Niezen et al., 1998) and increase post-ruminal protein availability (Waghorn et al., 1994). This study aimed to evaluate the anthelmintic and nutritional properties of sulla forage in relation to its CT content. Thus, the growth performance and the level of nematode infestation of lambs fed sulla were compared with those of lambs fed ryegrass (Lolium multiflorum Lam. subsp. wersterwoldicum), lacking in CT.
Leaf, Pod And Whole Plant Tannin Contents In Pigeon Pea (Cajanus Cajan (L.) Millsp), Rodolfo Godoy, P. M. Santos, Francisco H. D. Souza
Leaf, Pod And Whole Plant Tannin Contents In Pigeon Pea (Cajanus Cajan (L.) Millsp), Rodolfo Godoy, P. M. Santos, Francisco H. D. Souza
IGC Proceedings (1977-2023)
Tannin content is an important characteristic of leguminous crops and it has been used as a selection criterion in pigeon-pea improvement programmes (Godoy et al., 1994). In south-eastern Brazil, pigeon pea is often consumed by bovines in the dry season (from April though October), after flowering occurs, and is recommended in some cases, specifically for that time of the year (Lourenço et al., 1994). Since tannin content is being used as a selection criterion and the animals in the dry season preferentially eat pods and leaves, an experiment was conducted to compare whole plant, leaf and pod tannin …
Bat Use Of Afforested And Encroached Patches And Their Role In Extending Bat Habitat Into The Nebraska Sandhills, Jacob L. Wagner
Bat Use Of Afforested And Encroached Patches And Their Role In Extending Bat Habitat Into The Nebraska Sandhills, Jacob L. Wagner
School of Natural Resources: Dissertations, Theses, and Student Research
The Nebraska Sandhills are currently undergoing a state shift to a redcedar dominated woodland due to anthropologic planting of eastern redcedar (Juniperus virginiana) and woody encroachment from the periphery of the Sandhills. To better understand this novel ecosystem and how bats are utilizing it I collected data at Barta Brothers Ranch with acoustic sensor grids consisting of 24,100 m-spaced acoustic sensors placed adjacent to planted windbreaks. Supplemental data from the Nebraska North American Bat Monitoring Program was used for data analysis at larger spatial scales. I used linear regressions and kriging interpolation maps to see how bats used windbreaks during …
Sedimentary Processes And Instability On The Mississippi River Delta Front Near The Wreck Of The Ss Virginia, Nathan Figueredo
Sedimentary Processes And Instability On The Mississippi River Delta Front Near The Wreck Of The Ss Virginia, Nathan Figueredo
LSU Doctoral Dissertations
Multi-cores and piston cores were collected seaward of the Mississippi River Delta’s Southwest Pass at ~80 m water depth in 2017 to better understand sedimentary characteristics and processes on the Mississippi River Delta Front (MRDF) in the vicinity of the SS Virginia shipwreck, and to support marine archeological research. Core analyses were performed to inform our understanding of the dynamics of sediment motion in the study area through radionuclide activity (210Pb and 137Cs), volume frequency of grain size, bulk density, and fabric (X-Radiography). Sediment accumulation rates (SAR), calculated from multi-core 210Pb activity are 0.22 - 0.29 …
Geoarchaeology Of Estuarine Seascapes In Tampa Bay, Florida., Kendal R. Jackson
Geoarchaeology Of Estuarine Seascapes In Tampa Bay, Florida., Kendal R. Jackson
USF Tampa Graduate Theses and Dissertations
This dissertation investigates the geological, ecological, and archaeological histories of Tampa Bay, Florida’s largest open-water estuary system. Previous geoscientific and archaeological work has studied the evolution of Florida’s estuaries as ‘pre-anthropogenic’ ecosystems and conceptualized Indigenous maritime societies as mostly passive inhabitants of dynamic ‘natural’ environments. Further, the environmental legacies of more recent, industrial-scale estuary modification attending Florida’s 20th-century population boom have been understudied—leading to popular and scientific confusion about historical conditions. The work composing this dissertation research seeks to reconceptualize Tampa Bay as a complex mosaic of cultural seascapes that have been variously altered and modified by human societies across …
Reintroducing Hemp (Rongony) In The Material Palette Of Madagascar: A Study On The Potential Of Hemp Clay Components And Its Impact On Social And Ecological Communities., Henintsoa Thierry Andrianambinina
Reintroducing Hemp (Rongony) In The Material Palette Of Madagascar: A Study On The Potential Of Hemp Clay Components And Its Impact On Social And Ecological Communities., Henintsoa Thierry Andrianambinina
Masters Theses
When mentioning the word hemp, especially in the local language of Madagascar, the literal translation does not set it apart from marijuana, as they are both called “rongony” - creating the stigma around hemp as the negative stereotype of marijuana. However, the material has been used by the ancestors of Madagascar, as well as across cultures, in its fibrous form to produce fabrication like textile goods and packaging. During colonization, the prohibition of hemp intensified, and since then, any activity related to either of these plants is prohibited and will end in severe punitive measures. This thesis explores the strengths …
Beyond The Lines, Miranda-Max De Beer
Beyond The Lines, Miranda-Max De Beer
Masters Theses
Long-held frameworks and philosophies developed over human history have rarely accounted for dynamic flux or shifts between parallel states of being; they’ve ignored the glaring consequences humanity’s brief occupation of the Geologic Timeline will have on the planet. These beliefs have enabled societies to operate through life as if there was no tomorrow, (ab)using the Earth without considering those who eventually reap what’s sown. Beyond the Lines identifies manifestations of the mindset that restricts how we understand living systems and the world around us as so much of what exists in tandem with contemporary society does not adhere to the …
Unearthing Complexity: Tangible Histories Of Water And Earth, Alexis Violet
Unearthing Complexity: Tangible Histories Of Water And Earth, Alexis Violet
Masters Theses
Unearthing Complexity investigates conceptions of time and surface through geological stories of the water and earth. Building on theories of deep time, hydrofeminism, critical zones, and grounding, I hope to foster a deeper awareness of time scales other than our own and a more tangible understanding of the embodied experience of matter in the universe. Working toward a new literacy of the water and earth in which they are recognized as living, changing bodies to which we are inherently tied at a molecular level, the site of this multiscalar inquiry occurs in the coastal zones of the Narragansett Bay where …
Wast3d Potential, Andrew Larsen
Wast3d Potential, Andrew Larsen
Masters Theses
Waste is obsolete. Standard building industry practices are harmful to the environment. Non-traditional construction methods were examined as alternatives. Circular design logic was the guiding principle in material choice. Additive manufacturing is a proven modern method for building construction. Research on 3D printing case studies revealed that recycled plastic is a proven material and readily available. Removing plastic waste from the environment and sequestering it in architectural components gives the material a new purpose. The component of focus was a building block for a wall assembly. Inspiration was taken from the hexagonal Basalt rock formations found near volcanic fault lines. …
A Review Of Theropithecus Oswaldi With The Proposal Of A New Subspecies, Dagmawit Abebe Getahun, Eric Delson, Chalachew Mesfin Seyoum
A Review Of Theropithecus Oswaldi With The Proposal Of A New Subspecies, Dagmawit Abebe Getahun, Eric Delson, Chalachew Mesfin Seyoum
Publications and Research
Theropithecus oswaldi darti, as currently understood, is the oldest Theropithecus taxon in the fossil record and the earliest subspecies in the Theropithecus oswaldi lineage. Theropithecus oswaldi darti is typified at the site of Makapansgat in South Africa, and a similar form (T. o. cf. darti) is usually recognized at Hadar, Dikika, some Middle Awash localities, and Woranso-Mille in Ethiopia. This taxon is also tentatively believed to occur in Kenya at Kanam and Koobi Fora and in Member C of the Shungura Formation in Ethiopia. While there is a general consensus that the East African ‘darti’ specimens are …
Corn Cob And Corn Husk Biochars Enhance The Growth Of Corn (Zea Mays L.) In Fertilized Clay Loam Soil, Arsenio D. Bulfa Jr, Gina Villegas Pangga, Amparo M. Wagan
Corn Cob And Corn Husk Biochars Enhance The Growth Of Corn (Zea Mays L.) In Fertilized Clay Loam Soil, Arsenio D. Bulfa Jr, Gina Villegas Pangga, Amparo M. Wagan
The Philippine Agricultural Scientist
Biochar is a carbon (C) rich material that improves soil quality, increases crop yield, and is produced from biomass pyrolysis under a limited oxygen environment. An experiment laid out in a split-plot, a completely randomized design (CRD) and was conducted to investigate the growth responses of corn-to-corn cob biochar (CCB) (15 t ha-1), and corn husk biochar (CHB) (15 t ha-1) in a Lipa clay loam soil (Typic Eutrudepts) applied with organic fertilizer (OF) (10 t ha-1) and inorganic fertilizer [recommended rate (RR):120 N;60 P2O5-60; K2O …
Natural And Anthropogenic Factors Affecting The Development Of Two Highland Agricultural Soils Of Bukidnon, Philippines, Guadalupe D. Calalang, Laurent Bock, Gilles Colinet, Vincent Hallet, Peter Walpole
Natural And Anthropogenic Factors Affecting The Development Of Two Highland Agricultural Soils Of Bukidnon, Philippines, Guadalupe D. Calalang, Laurent Bock, Gilles Colinet, Vincent Hallet, Peter Walpole
The Philippine Agricultural Scientist
This research was conducted in two highland areas of Bukidnon, Philippines: Miarayon, a sub-catchment of the upper Cagayan de Oro River; and Bendum, a sub-catchment of the upper Pulangui River. Due to their pyroclastic parent rock materials, soils in the upper Cagayan de Oro are classified as Andic Cambisol in open and convex positions, and Andic Umbrisol in concave and depressed positions. Soils in the upper Pulangui are classified as Pisoplinthic Acrisol, Ferralic Nitisol, and Acric Nitisol in areas with ultramafic rock parent materials, and Haplic Cambisol with pyroclastic deposits. Element contents in rocks were congruent to the total soil …
Characterization Of Boreal-Arctic Vegetation Growth Phases And Active Soil Layer Dynamics In The High-Latitudes Of North America: A Study Combining Multi-Year In Situ And Satellite-Based Observations, Michael G. Brown
Dissertations, Theses, and Capstone Projects
This dissertation examined the seasonal freeze/thaw activity in boreal-Arctic soils and vegetation physiology in Alaska, USA and Alberta, Canada, using in situ environmental measurements and passive microwave satellite observations. The boreal-Arctic high-latitudes have been experiencing ecosystem changes more rapidly in comparison to the rest of Earth due to the presently warming climatic conditions having a magnified effect over Polar Regions. Currently, the boreal-Arctic is a carbon sink; however, recent studies indicate a shift over the next century to become a carbon source. High-latitude vegetation and cold soil dynamics are influenced by climatic shifts and are largely responsible for the regions …
Effect Of Condensed Tannins In Sainfoin On In Vitro Protein Solubility Of Lucerne, J. Aufrère, M. Dudilieu, C. Poncet, R. Baumont
Effect Of Condensed Tannins In Sainfoin On In Vitro Protein Solubility Of Lucerne, J. Aufrère, M. Dudilieu, C. Poncet, R. Baumont
IGC Proceedings (1977-2023)
Proteins of fresh legume forages such as lucerne are highly degraded in the rumen, resulting in their inefficient use by the animal. The condensed tannins (CT) present in some forages can improve the nutritional value of these forages and of associated feeds in the diet. Previous in vitro work (Waghorn & Shelton, 1997) showed that CT from Lotus corniculatus are able to bind with and precipitate protein from a ryegrass/clover pasture, but when these forages were fed to sheep, the CT effects on digestion and animal performance were weak. This revealed a need for a better understanding of the mechanism …
Herbage Production, Nitrogen Fixation And Condensed Tannin Concentrations In Lotus Glaber Mill. Germplasm, H. Acuña, M. Figueroa, P. Hellman, A. Concha
Herbage Production, Nitrogen Fixation And Condensed Tannin Concentrations In Lotus Glaber Mill. Germplasm, H. Acuña, M. Figueroa, P. Hellman, A. Concha
IGC Proceedings (1977-2023)
Lotus glaber (Lg) grows on clay, sandy and medium textured soils in central Chile (32º to 38º S). The diversity of environments where the species grows naturally supports the hypothesis that genetic variability would be found. The objectives of the experiment were to characterise accessions of Lg collected in the region for dry matter (DM) production, comparative capacity to fix atmospheric N and condensed tannins (CT) in Lg grown on clay soils used for cropping rice.
Condensed Tannins In Different Varieties Of Lotus Corniculatus, Christina L. Marley, Rhun Fychan, R. Jones
Condensed Tannins In Different Varieties Of Lotus Corniculatus, Christina L. Marley, Rhun Fychan, R. Jones
IGC Proceedings (1977-2023)
Research has shown that Lotus corniculatus may provide benefits as a grazing forage for ruminants, because of improved efficiency of protein utilisation in part due to the presence of condensed tannins (CT) in the forage. Lotus species have been found to contain different CT (Aerts et al., 1999). The aim of this experiment was to determine if differences exist in CT concentration among L. corniculatus varieties.
Ariation In Tannin Content And Morphological Traits In Lotus Corniculatus L. (Bird’S-Foot Trefoil), A. H. Marshall, F. Ribaimont, R. P. Collins, D. Bryant, M. T. Abberton
Ariation In Tannin Content And Morphological Traits In Lotus Corniculatus L. (Bird’S-Foot Trefoil), A. H. Marshall, F. Ribaimont, R. P. Collins, D. Bryant, M. T. Abberton
IGC Proceedings (1977-2023)
Lotus corniculatus L. (bird's-foot trefoil) is a potentially valuable species for UK grassland agriculture. The herbage contains proanthocyanidins, or condensed tannins (CT's), which help to reduce bloat, have anthelmintic properties, can protect protein in the rumen, and thus potentially reduce N losses to the environment. It is currently a relatively minor species within UK grassland, as available varieties lack persistence in mixed swards (Hopkins et al., 1996). The seed used is of foreign bred varieties with no varieties bred specifically for the UK environment. To explore the feasibility of breeding L. corniculatus for the UK, variation in morphological traits, …
Light Intensity Is Positively Correlated With The Synthesis Of Condensed Tannins In Lotus Corniculatus, Sergio Arcioni, T. Bovone, F. Damiani, F. Paolocci
Light Intensity Is Positively Correlated With The Synthesis Of Condensed Tannins In Lotus Corniculatus, Sergio Arcioni, T. Bovone, F. Damiani, F. Paolocci
IGC Proceedings (1977-2023)
The importance of Condensed Tannins (CT) in forage legumes has been well documented in several studies. The role of plant genetics in this field is the acquisition of competences in order to be able to modulate CT synthesis in leaves of these species. The role of light has been investigated in this work on the increase of condensed tannin levels in leaves of two contrasting genotypes of birdsfoot trefoil (Lotus corniculatus).
Condensed Tannin Concentration And Herbage Accumulation Of A White Clover Bred For Increased Floral Condensed Tannin, V. T. Burggraaf, S. L. Woodward, D. R. Woodfield, E. R. Thom, G. C. Waghorn, P. D. Kemp
Condensed Tannin Concentration And Herbage Accumulation Of A White Clover Bred For Increased Floral Condensed Tannin, V. T. Burggraaf, S. L. Woodward, D. R. Woodfield, E. R. Thom, G. C. Waghorn, P. D. Kemp
IGC Proceedings (1977-2023)
White clover is a high quality feed for ruminants, however, its high protein content results in excessive urea excretion in urine and can cause bloat, reducing its potential value for animal production. The condensed tannins (CT) in some forages can reduce these problems, but plants may have poor agronomic performance. White clover produces CT in its flower heads, but herbage CT concentrations are normally too low to benefit animals. This paper reports CT concentrations and herbage accumulation over 2 years of an experimental line of white clover (HT) selected for increased flowering and floral CT concentrations.
Effects Of Simulated High-Sugar Forages On Grazing Behaviour Of Sheep, Gerald P. Cosgrove, A. J. Parsons
Effects Of Simulated High-Sugar Forages On Grazing Behaviour Of Sheep, Gerald P. Cosgrove, A. J. Parsons
IGC Proceedings (1977-2023)
Sustaining an optimum composition in mixed-species pasture and in the diet of grazing animals is constrained by many factors. Altering the concentration of water soluble carbohydrate (WSC) of one species to improve its nutritional value for animals may not deliver the benefits in the assumed manner if it also affects preference and the balance of species in the pasture. Furthermore, associated changes in other constituents (e.g. fibre, protein) make it difficult to attribute animal responses solely to the manipulated trait (e.g. Lee et al. 2000). The objective of this study was to simulate changes in the concentration of water soluble …
High Floral Tannin White Clover Reduces Rumen Ammonia Concentrations In Dairy Cows, V. T. Burggraaf, G. C. Waghorn, S. L. Woodward, D. R. Woodfield, E. R. Thom, P. D. Kemp
High Floral Tannin White Clover Reduces Rumen Ammonia Concentrations In Dairy Cows, V. T. Burggraaf, G. C. Waghorn, S. L. Woodward, D. R. Woodfield, E. R. Thom, P. D. Kemp
IGC Proceedings (1977-2023)
White clover produces high quality forage for ruminant production, but it results in high rumen ammonia concentrations, indicating extensive protein degradation. The excess ammonia is absorbed through the rumen and excreted as urea in urine, at a cost to the animal and the environment. Condensed tannins (CT) contained in some forages reduce proteolysis in the rumen, which can lead to increased amino acid absorption and therefore improved animal performance. White clover produces CT in its flower heads, but concentrations are normally too low to benefit animals. This paper reports on comparisons of rumen ammonia concentrations in dairy cows grazing HT …
Substrate-Dependent Activation Of Polyphenol Oxidase In Red Clover, Ana L. Winters, F. R. Minchin, P. Morris
Substrate-Dependent Activation Of Polyphenol Oxidase In Red Clover, Ana L. Winters, F. R. Minchin, P. Morris
IGC Proceedings (1977-2023)
Polyphenol oxidases (PPO) are copper metaloproteins that catalyse the oxidation of o-diphenols to quinones, highly reactive molecules which readily bind to nucleophilic sites on cellular components and proteins. Red clover protein, due to this enzyme is resistant to protease degradation during. Theses enzymes (circa. 60-65 kDa) are located in the thylakoid lumen and can be converted to a 40-45 kDa form by proteolysis both in vitro and in vivo (Gelder et al., 1997). Conversion to the smaller form has been demonstrated to confer activity at neutral pH. Other treatments, such as the presence of lipids or detergents …
Variation In Protein Quality Of Forage Legumes During Spring Growth, M. Gierus, J. Kleen, F. Taube
Variation In Protein Quality Of Forage Legumes During Spring Growth, M. Gierus, J. Kleen, F. Taube
IGC Proceedings (1977-2023)
The utilisation of forage legumes in combination with reduced N inputs as fertilisers is an alternative for the production of high quality forage. Although white clover (WC) is widely used in grassland and has a high content of crude protein (CP), a combination of this high CP content with a high proportion of rapidly-available proteins and fast degradation rate in the rumen may reduce the efficiency of N use by ruminants in comparison with other forage legumes. The objective of the present study was to investigate the variation in content of CP fractions A, B and C in different forage …
Effects Of Particle Size In Forage Samples For Protein Breakdown Studies, G. Pichard, C. Tapia
Effects Of Particle Size In Forage Samples For Protein Breakdown Studies, G. Pichard, C. Tapia
IGC Proceedings (1977-2023)
Coupling ruminal processes of hydrolysis and synthesis continues to be a research issue where more progress is needed. This requires the development of good protein assessment methods, particularly when representing the breakdown processes that occur in fresh pastures eaten by herbivores. Laboratory analyses need to deal with small and homogeneous samples, but the mechanical reduction of particle size may not reflect the actual digestion kinetics occurring when the original fresh forage is consumed. Such physical traits may alter the release of non-structural compounds and the penetration of microbial enzymes (Boudon et al., 2002). The objective of this work was …