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Articles 541 - 570 of 11458
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Effect Of Management And Cultivar On Nodal Root Development Of White Clover, J R. Caradus, D F. Chapman, R A. Skipp
Effect Of Management And Cultivar On Nodal Root Development Of White Clover, J R. Caradus, D F. Chapman, R A. Skipp
IGC Proceedings (1977-2023)
Nodal root development of white clover (Trifolium repens L.) swards was monitored by harvesting marked nodes from late autumn to spring and by taking tiller plugs over 15 months. At a hill country site Grasslands Huia and a large-leaved French eultivar, Crau, had greater nodal root development, in terms of root length, than a smallleaved hill country ecotype. Compadson of the effects of rotational sheep and cattle grazing at both lowland and hill country sites showed greater nodal root development root length and lateral root production under cattle grazing. Percentage of nodes with roots was greater under rotational than set-stocked …
The Piosphere Effect Of A Goat Corral On The Productivity Of Arid Mediterranean-Type Rangelands In Northern Chile, S Lailhacar, A Mansilla, L Faundez, P Tonini
The Piosphere Effect Of A Goat Corral On The Productivity Of Arid Mediterranean-Type Rangelands In Northern Chile, S Lailhacar, A Mansilla, L Faundez, P Tonini
IGC Proceedings (1977-2023)
Arid rangelands of northern Chile consist of open shrub formations associated with a seasonal herbaceous stratum. Small pastoralists (comuneros) use the available fodder fer goat raising, by managing individual flocks under continuous grazing. Since each flock spends nights in a corral, a piosphere effect has evolved around it. Through radial transects and quadrals starling from the corral, cover, density, diversity and yield were determined for herbaceous and woody species. Except for shrub diversity and herbage yield, all other total variables showed significant increments with distance. When individual species were considered, different response trends were observed. Some species decreased, others increased, …
The Chaco Savanna Lands Of South America With Particular Reference To The Processes Of Degradation In Their Pastoral And Forestry Resources, Carlos Saravia Toledo
The Chaco Savanna Lands Of South America With Particular Reference To The Processes Of Degradation In Their Pastoral And Forestry Resources, Carlos Saravia Toledo
IGC Proceedings (1977-2023)
The South American Chaco, covering more than 1.2 million km2, is second only to the Amazonian natural savanna region. It is the southern extension of the vast savanna zone of the continent, ranging 2000 km on either side of the Tropic of Capricorn. In its pristine state it presented vast pastoral and forestry resources, but in less than 120 years, these resources have been devastated by their uncontrolled exploitation. For most of the drier half of the region the productivity has declined to very low levels. The pastoral resources were decimated by uncontrolled livestock grazing of cattle, sheep, goats, pigs, …
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
IGC Proceedings (1977-2023)
Africa continues to face a food and agricultural crisis, the effects of which are sometimes exacerbated by drought and civil strife. The food crisis is the result of the inability of African countries in the humid tropical areas and other zones to produce enough food to satisfy escalating demand, owing largely to rapid population growth and pressures of modernisation. Furthermore, the inability of these countries to earn adequate incomes and the lack of food security, especially in some countries suffering from drought, civil strife or war, has resulted in increasing reliance on food aid to fulfil their food import requirements. …
Hybridization Among Atylosia Species, S N. Tripathi
Hybridization Among Atylosia Species, S N. Tripathi
IGC Proceedings (1977-2023)
Hybridisations among Atyloslaalbicans (twining shrub),A.scarabaeoides species (herbaceous creeper) and A. cajanlfolia (erect shrub) were carried out. The interspecific cross A. albicans x A. scarabaeoides and trispecific cross (F1 of A. albicans x A. Scarabaeoides) x A. Cajanifolia manifest forage potentially through their various morphogenetic types, erect with profuse branching and high leafiness, semi-erect coupled with profuse branching, semi-erect bushy, and spreading with broadleaves. These hybrids possess desirable gene combinations for tolerance, persistence, vigour and productivity which constitute important attributes for their adaptive fitness in tropical grasslands. Although the 3 Atylosia species were morphogenetically divergent from one another, …
Selfing And Competition Applied To Lucerne Breeding And To Variety Constitution, P Rotili
Selfing And Competition Applied To Lucerne Breeding And To Variety Constitution, P Rotili
IGC Proceedings (1977-2023)
The variety constitution process of the forage Crops Institute of Lodi is characterised by: 1) the exploitation of interference effects (competition): 2) the utilisation of a selfing phase; 3) a synthetic variety formula based on parental clones derived by several parental populations, The phenotypic choice of mother plants and the progeny tests are made in dense swards. The research on competition has allowed the formulation of an ideal model of the lucerne (Medicago saliva L.) stand and of the plant ideotype, The ideal model of the lucerne stand is characterised by the synchrony of the individual plants for the physiological …
Achievements And Perspectives In The Breeding Of Forage Grasses And Legumes, A.J P. Van Wijk, J G. Boonman, W Rumball
Achievements And Perspectives In The Breeding Of Forage Grasses And Legumes, A.J P. Van Wijk, J G. Boonman, W Rumball
IGC Proceedings (1977-2023)
Successful breeding progrnmmes on forage grasses and legumes have in common that they made seed and plant material of superior genetic and physical quality available to the end-user at competitive prices. This was achieved by government- and privately-funded breeding programmes. A distinction between these two types of breeding organisations is made and discussed. Achievements in various areas are presented and the constraints the breeder is faced with ore given. It is felt that highly advanced genetic designs are not directly applicable, but that progress can continue to be made by applying classical procedures at a greater level of efficiency.
Evaluation Of Roadway Reconfigurations In Louisville, Kentucky, William Staats, Adam Kirk
Evaluation Of Roadway Reconfigurations In Louisville, Kentucky, William Staats, Adam Kirk
Kentucky Transportation Center Research Report
In 2009, Louisville Metro Public Works undertook its first roadway reconfiguration project, converting a section of Eastern Parkway (US 60A) from a four-lane undivided road to a three-lane section with a two-way left-turn lane and one travel lane in each direction. Since this initial project, Louisville Metro Public Works and the Kentucky Transportation Cabinet (KYTC) have completed 40 roadway reconfigurations to reduce the number of through lanes and reassign existing right-of-way to other roadway users. Additionally, the agencies have 25 more planned or proposed reconfiguration projects. This report documents the safety and operational performance of reconfigured roads. Across all projects, …
Evaluation Of Manual Thermal Brake Screening Systems, Jeeyen Koo, David Leddy, Jennifer Walton
Evaluation Of Manual Thermal Brake Screening Systems, Jeeyen Koo, David Leddy, Jennifer Walton
Kentucky Transportation Center Research Report
In 2021, manual thermal brake screening systems were installed at Lyon EB and Rowan County weigh stations. Two additional units were installed at Laurel SB and Scott County weigh stations the following year. Although this system is called a thermal brake screening system, its thermal camera images are used to find both brake and tire-related violations. At the time of this project, Lyon (EB), Rowan, and Scott County inspection locations also had tire pressure detection systems in addition to manual thermal brake screening systems. Both systems can be used to identify tire-related violations, but inspectors prefer to use the tire …
Antimicrobial Resistance In Equines: A Growing Threat To Horse Health And Beyond-A Comprehensive Review., Ajran Kabir, Bibek Lamichhane, Tasmia Habib, Alexis Adams, Hossam El-Sheikh Ali, Nathan M Slovis, Mats H. T. Troedsson, Yosra A. Helmy
Antimicrobial Resistance In Equines: A Growing Threat To Horse Health And Beyond-A Comprehensive Review., Ajran Kabir, Bibek Lamichhane, Tasmia Habib, Alexis Adams, Hossam El-Sheikh Ali, Nathan M Slovis, Mats H. T. Troedsson, Yosra A. Helmy
Veterinary Science Faculty Publications
The equine industry holds substantial economic importance not only in the USA but worldwide. The occurrence of various infectious bacterial diseases in horses can lead to severe health issues, economic losses, and restrictions on horse movement and trade. Effective management and control of these diseases are therefore crucial for the growth and sustainability of the equine industry. While antibiotics constitute the primary treatment strategy for any bacterial infections in horses, developing resistance to clinically important antibiotics poses significant challenges to equine health and welfare. The adverse effects of antimicrobial overuse and the escalating threat of resistance underscore the critical importance …
Influence Of Different Breeds Of Pigs To The Natural Succession, H D. Matthes, A.C D. Micklich, G Dietl, H Mohring, W Jentsch
Influence Of Different Breeds Of Pigs To The Natural Succession, H D. Matthes, A.C D. Micklich, G Dietl, H Mohring, W Jentsch
IGC Proceedings (1977-2023)
The aim of this study was to find out the effect of pigs on the natural succession. We used 4 different breeds of pigs for our investigations. Because of the grazing behaviour and their rooting activity the total number of plants increased up to 30%. But the vegetation quickly returned to conditions prior to rooting, if the rooting activity fails to happen. Rooting activity of pigs on floodplain soil and following grazing in the next spring after rooting permits seeds of different species of plants to germinate and develop in the plant free areas. These plants often have little chance …
High Moisture Corn Supplementation Of Different Dry Matter Content To Cows Grazing Temperate Pasture, D H. Rearte, H Alvarez, F Santini
High Moisture Corn Supplementation Of Different Dry Matter Content To Cows Grazing Temperate Pasture, D H. Rearte, H Alvarez, F Santini
IGC Proceedings (1977-2023)
The objective of this study was to evaluate grazing dairy cows performance supplemented with high moisture corn of different dry matter content. Cows grazed fresh forage oat day and night and received 5 kg DM high moisture corn daily. Treatments 1 and 2 were high moisture corn of 30% and 18% moisture content respectively. Twenty Holstein cows were used for milk production and composition studies and six rumen fistulated cows were used for rumen digestion studies. Milk production and composition and body weight gain were not affected by the dry matter content of the supplemented high moisture corn. Related to …
Seasonal Distribution Of Forage Yield From A "Natural" Pasture Under Rotational Grazing, W R. Kanneganti, T R. Dhiman, R P. Walgenbach, L Massingill, M P. Russelle, L D. Satter
Seasonal Distribution Of Forage Yield From A "Natural" Pasture Under Rotational Grazing, W R. Kanneganti, T R. Dhiman, R P. Walgenbach, L Massingill, M P. Russelle, L D. Satter
IGC Proceedings (1977-2023)
A 2-yr grazing study was conducted to quantify forage available daily for cattle intake from a natural pasture managed under rotational grazing. Grazing was initiated around 1 May, and was managed with a rotation length of about 17 d each for cycles 1 and 2, and 30 d each for the rest. In 1994, under adequate moisture conditions, forage availability during 5/1-6/1, 6/1-8/15, 8/15-9/15, and 9/15-10/ 15 was 77, 66, 38 and 14 kg DM ha-1 d-1, respectively, resulting in a total yield of 8580 kg ha-1 in 175 d. In 1995, a prolonged period of dry summer reduced the …
The Effects Of Storage Period On The Germinability Of Rhodes Grass (Chloris Gayana), K C. Kawonga
The Effects Of Storage Period On The Germinability Of Rhodes Grass (Chloris Gayana), K C. Kawonga
IGC Proceedings (1977-2023)
An experiment was initiated to investigate the post harvest changes in the seed quality of Rhodes grass (Chloris gayana). The aim of the study was to find out the causes of poor germination of locally produced Rhodes grass seed. Random samples (72) were taken from a seed lot grown at Golden Valley Research Station. Seventy-two random samples were subdivided into groups of twelve and were stored at six locations. Half the samples were stored at room temperature and the other half were stored in the refrigerator for a period of one to six months. The germination test was …
Performance And Environmental Assessment Of Biochar-Based Membranes Synthesized From Traditional And Eco-Friendly Solvents, Abelline Katusiime Fionah, Isaac Oluk, Laura Brady, Diana M. Byrne, Isabel Escobar
Performance And Environmental Assessment Of Biochar-Based Membranes Synthesized From Traditional And Eco-Friendly Solvents, Abelline Katusiime Fionah, Isaac Oluk, Laura Brady, Diana M. Byrne, Isabel Escobar
UK CARES Faculty Publications
Water contamination resulting from coal spills is one of the largest environmental problems affecting communities in the Appalachia Region of the United States. This coal slurry contains potentially toxic substances, such as hydrocarbons, heavy metals, and coal cleaning chemicals, and its leakage into water bodies (lakes, rivers, and aquifers) can lead to adverse health effects not only for freshwater bodies and plant life but also for humans. This study focused on two major experiments. The first experiment involved the use of biochar to create a biochar–polysulfone (BC-PSf) flat-sheet multifunctional membrane to remove organic contaminants, and the other major experiment compared …
Examining The Progress In Additive Manufacturing In Supporting Lean, Green And Sustainable Manufacturing: A Systematic Review, Catherine Maware, Rumbidzai Muvunzi, Tinotenda Machingura, Ilesanmi Daniyan
Examining The Progress In Additive Manufacturing In Supporting Lean, Green And Sustainable Manufacturing: A Systematic Review, Catherine Maware, Rumbidzai Muvunzi, Tinotenda Machingura, Ilesanmi Daniyan
Institute for Sustainable Manufacturing Faculty Publications
The quest for waste reduction and the development of manufacturing processes that meet the economic, social and environmental requirements necessitate this study. Additive manufacturing is an emerging digital technology that can be used to seamlessly develop a product through material deposition in layers. The study aims to investigate the progress made in the development of additive manufacturing to support lean, green and sustainable manufacturing. The study employs a systematic literature review approach, specifically the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). A total of 158 articles identified from different academic databases that detailed empirical, conceptual and theoretical findings …
Serotonin Receptor-Mediated Vasorelaxation Occurs Primarily Through 5-Ht4 Activation In Bovine Lateral Saphenous Vein, Ronald J. Trotta, David L. Harmon, James L. Klotz
Serotonin Receptor-Mediated Vasorelaxation Occurs Primarily Through 5-Ht4 Activation In Bovine Lateral Saphenous Vein, Ronald J. Trotta, David L. Harmon, James L. Klotz
Animal and Food Sciences Faculty Publications
To better understand mechanisms of serotonin- (5-HT) mediated vasorelaxation, isolated lateral saphenous veins from cattle were assessed for vasoactivity using myography in response to increasing concentrations of 5-HT or selective 5-HT receptor agonists. Vessels were pre-contracted with 1 × 10−4 M phenylephrine and exposed to increasing concentrations of 5-HT or 5-HT receptor agonists that were selective for 5-HT1B, 5-HT2B, 5-HT4, and 5-HT7. Vasoactive response data were normalized as a percentage of the maximum contractile response induced by the phenylephrine pre-contraction. At 1 × 10−7 M 5-HT, a relaxation was observed …
Developing A Cross-Asset Allocation Mechanism, Jon Wilcoxson, Bryan Gibson, Bethany Paris
Developing A Cross-Asset Allocation Mechanism, Jon Wilcoxson, Bryan Gibson, Bethany Paris
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet (KYTC) has developed several tools and methods to compare the value of proposed projects within specific programs and asset classes, including the Enhanced Bridge Prioritization Index, Enhanced Pavement Prioritization Index, and the Strategic Highway Investment Formula for Tomorrow (SHIFT). Although immensely valuable, these methods and tools do not offer a convenient way of comparing the contributions of individual projects to meeting overall KYTC performance goals. As such, the Cabinet needs a robust mechanism for comparing the impact of projects across its capital, safety, and asset management programs. Following a review of cross-asset allocation frameworks described in …
Β-Aminopropionitrile Induces Distinct Pathologies In The Ascending And Descending Thoracic Aortic Regions Of Mice, Michael K. Franklin, Hisashi Sawada, Sohei Ito, Deborah A. Howatt, Naofumi Amioka, Ching Ling Liang, Nancy Zhang, David B. Graf, Jessica J. Moorleghen, Yuriko Katsumata, Hong S. Lu, Alan Daugherty
Β-Aminopropionitrile Induces Distinct Pathologies In The Ascending And Descending Thoracic Aortic Regions Of Mice, Michael K. Franklin, Hisashi Sawada, Sohei Ito, Deborah A. Howatt, Naofumi Amioka, Ching Ling Liang, Nancy Zhang, David B. Graf, Jessica J. Moorleghen, Yuriko Katsumata, Hong S. Lu, Alan Daugherty
Biostatistics Faculty Publications
BACKGROUND: β-aminopropionitrile (BAPN) is a pharmacological inhibitor of LOX (lysyl oxidase) and LOXLs (LOX-like proteins). Administration of BAPN promotes aortopathies, although there is a paucity of data on experimental conditions to generate pathology. The objective of this study was to define experimental parameters and determine whether equivalent or variable aortopathies were generated throughout the aortic tree during BAPN administration in mice. METHODS: BAPN was administered in drinking water for a period ranging from 1 to 12 weeks. The impacts of BAPN were first assessed with regard to BAPN dose, and mouse strain, age, and sex. BAPN-induced aortic pathological characterization was …
A Mini-Review Of Strategies For Recruiting Older African Americans To Alzheimer's Disease Research., Darlingtina Esiaka, Christina C Yarborough, Bernadette A Fausto, Mark A Gluck
A Mini-Review Of Strategies For Recruiting Older African Americans To Alzheimer's Disease Research., Darlingtina Esiaka, Christina C Yarborough, Bernadette A Fausto, Mark A Gluck
Behavioral Science Faculty Publications
African Americans experience higher incidence and prevalence of Alzheimer's disease (AD). Yet, they continue to be underrepresented in AD research, limiting the ability to generalize findings to the increasingly diverse US population. To reduce AD disparities, targeted efforts are needed to increase the representation of African Americans in AD research. This mini review identified evidence-based strategies that increased research participation among older African Americans. Four recruitment strategies emerged from eight published peer-reviewed studies that directly evaluated the effectiveness of strategies aimed at increasing the number of African American participants in Alzheimer's research. The strategies include community outreach and education, face-to-face …
The Potential Impact Of Endangered Species Legislation On Federal Grazing Lands And The Livestock Industry, G M. Luciuk, B Bristol, T W. Weins, D M. Boyle
The Potential Impact Of Endangered Species Legislation On Federal Grazing Lands And The Livestock Industry, G M. Luciuk, B Bristol, T W. Weins, D M. Boyle
IGC Proceedings (1977-2023)
Crown based grazing is an integral part of the management structure of cattle operations, and is very important to the economic fabric of rural communities. Federal crown lands, such as the PFRA operated community pastures are an integral part of the resource conservation efforts in western Canada. These lands represent a significant reservoir of the remaining natural lands which are important for wildlife habitat. Sustainable management of such contiguous blocks of land is essential for the maintenance of biodiversity. Proposed endangered species legislation would require the development of recovery plans on federal lands for endangered, threatened and extirpated species. Rural …
Objective Indicators For Monitoring Drought In Grasslands, D H. White, S M. Howden
Objective Indicators For Monitoring Drought In Grasslands, D H. White, S M. Howden
IGC Proceedings (1977-2023)
Australia’s National Drought Policy was ratified by the Commonwealth (Federal), State and Territory governments in 1992. However, a sequence of El Niño-based events that started in Queensland in 1991 culminated in much of Australia experiencing abnormally low rainfall throughout 1994 and into 1995. Many farmers experienced substantial loss of income. The Commonwealth government therefore devised measures to determine which areas had been exposed to exceptional drought so that financial assistance could be directed as effectively as possible. In this paper we discuss progress in developing regionally-sensitive indicators and methodologies to aid in future assessments of drought exceptional circumstances.
Linear And Community-Based Processes Of Ethical Decision Making For Grassland Workers, Gary W. Fick
Linear And Community-Based Processes Of Ethical Decision Making For Grassland Workers, Gary W. Fick
IGC Proceedings (1977-2023)
Grasslands are basic elements in sustainable development, but few grassland workers are familiar with concepts of ethical decision making useful in integrating ecological, economic, and sociological components of sustainability. Most published procedures for ethical decision making are based on linear models for individualized social systems with modern technologies. In the context of sustainable agriculture, nonlinear community-based procedures may be more appropriate. In this paper, a nonlinear model from the Haudenosaunee (Iroquois) Indians is compared to more conventional linear procedures. After identification of a problem, linear models often leave the solution of the ethical dilemma (ranking ethical goals when they conflict) …
Evaluation Of Lolium Perenne And Lolium Multiflorum Cultivars In Chilean Andisols, F R. Demanet, M G. Mora
Evaluation Of Lolium Perenne And Lolium Multiflorum Cultivars In Chilean Andisols, F R. Demanet, M G. Mora
IGC Proceedings (1977-2023)
During the seasons 1992/93, 1993/94, 1994/95, the productive pattern of seven cultivars of Lolium perenne: Nui, Ellett, Santa Elvira, Solo, Embassy, Super Nui, Marathon and five Lolium multiflorum: Tetrone, Montblanc, Concord, Aberoscar, Abercomo, was evaluated in a dryland area of Southern Chile. The average season at yield reached by the evaluated cultivars was statistically similar (P< 0.05). However, Ellett, Solo and Marathon, showed a higher persistence and Tetrone and Montblanc presented a plant structure which might allow a greater complementation with Trifolium pratense.
Evaluation Of Morphological, Biological And Chemical Properties For Breeding On New Fodder-Grass Cultivars, S Kozlowski, B Golinska, P Golinski
Evaluation Of Morphological, Biological And Chemical Properties For Breeding On New Fodder-Grass Cultivars, S Kozlowski, B Golinska, P Golinski
IGC Proceedings (1977-2023)
Our work is an attempt to emphasize the importance of grass morphological, biological and chemical properties in the process of development of new forage cultivars. Results of our investigations indicate that there are realistic possibilities of developing grass cultivars with improved nutritive properties. However, breeding works can only be effective if a wide range of different properties can be taken into consideration and if, simultaneously, mutual correlations occurring between them are also considered. High mutability of properties revealed by lower taxonomic units of the species observed in Poland indicates that they can constitute a valuable material for breeding work on …
Australian And Us Experiences With Transfer Of Rangeland Improvement Technologies: A Comparative Analysis, A P. Thurow, N Macleod, J R. Conner
Australian And Us Experiences With Transfer Of Rangeland Improvement Technologies: A Comparative Analysis, A P. Thurow, N Macleod, J R. Conner
IGC Proceedings (1977-2023)
American and Australian range economists work in tandem with range ecologists and management specialists to develop and analyze strategies for technology transfer. Historically, this process has developed around a model aimed at communication with a narrow target group (ranchers) with easily-defined and homogeneous goals (continuously improving income). In accord with this traditional model of technology transfer, the focus of range economists’ inquiries was once to assess the cost-effectiveness of grazing improvement technologies (Conner, 1985). It is a relatively recent phenomenon that both American and Australian range technology transfer agents are encountering an increasingly broad social and ecological agenda. Ranchers recognize …
The Evolving International Grassland Congress, L R. Humphreys
The Evolving International Grassland Congress, L R. Humphreys
IGC Proceedings (1977-2023)
The locations of the International Grassland Congresses are listed. Analysis of the disciplinary themes of papers presented at five Congresses from 1937 to 1993 indicated a considerable homeostasis of content. The plant genetic base for grassland improvement received most attention, and this, together with plant physiology, plant ecology and soil science contributed 52 to 57 per cent of the subject matter at all five Congresses. Emergent topics are mentioned.
The Influence Of Range Condition On The Hydrological Characteristics In A Semi-Arid Rangeland, H A. Snyman
The Influence Of Range Condition On The Hydrological Characteristics In A Semi-Arid Rangeland, H A. Snyman
IGC Proceedings (1977-2023)
Herbage production, water-use efficiency (i.e. above-ground phytomass production per unit of evapotranspiration), surface runoff, deep percolation, soil loss and soil organic matter content were determined on rangeland in three different ecological conditions, viz. poor, moderate and good, for 20 years. Hydraulic non-floating lysimeters were used to determine evapotranspiration (Et), soil evaporation (E) and deep percolation. Runoff and soil loss were recorded on runoff plots. Above-ground phytomass production, water-use efficiency, deep percolation and soil organic matter content decreased (P<0.01) when plant cover was reduced or range and soil condition declined. The dense plant cover of veld in good condition provides a situation in which surface runoff and soil loss rates are lower (P<0.01) than that from veld in poor condition.
Grazing Sheep On Revegetated Saline Pastures: Effects Of Season And Grazing On Morphology And Nutritive Value Of Saltbush, Atiq Ur Rehman, J B. Mackintosh, B E. Warren, D R. Lindsay
Grazing Sheep On Revegetated Saline Pastures: Effects Of Season And Grazing On Morphology And Nutritive Value Of Saltbush, Atiq Ur Rehman, J B. Mackintosh, B E. Warren, D R. Lindsay
IGC Proceedings (1977-2023)
This experiment was designed to determine the thickness of saltbush (Atriplex amnicola) stem grazed by sheep, grazing pressure on saltbush in the presence of understorey and the effect of season on the nutritive value of saltbush. Four 0.9 ha plots of Atriplex amnicola were grazed by a group of 10 Merino wethers each. The results indicated that the maximum diameter of stem selected by sheep under extreme conditions was only 1.5 mm. The number of stems chewed per 0.1m2 quadrat were 0.8, 9.6, 20.1 and 18.0 (P<0.05) after 2, 4, 6 and 8 wk. From January to June the nitrogen content (14 to 30 gkg-1) and DMD (0.65 to 0.72) of saltbush leaves remained high. These results suggest that in the presence of understorey the grazing pressure on saltbush was least and increases when the feed from understorey was exhausted. The nutritional value of saltbush did not deteriorate severely during the summer and autumn period.
The Role Of Seeds Rate In Higher Persistence On Newly Established Meadows, P Golinski, S Kozlowski
The Role Of Seeds Rate In Higher Persistence On Newly Established Meadows, P Golinski, S Kozlowski
IGC Proceedings (1977-2023)
The paper presents results of a 7-year experiment concerning four mixtures applied for the renewal of meadows using the method of conventional tillage. The increase of the seed rate guarantees that the final composition of the obtained sward resembles the composition of species used in the sowing mixture and, what is equally important, this composition remains unchanged for a long period of utilization of meadows subjected to this method of renovation. Denser sowing restricts the appearance in the sward of species not used in the sowing mixture. Furthermore, it allows the development of a much more compact sward with a …