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Articles 1801 - 1830 of 12202
Full-Text Articles in Entire DC Network
Nutrient Cycling And Crop Responses On Integrated Crop-Livestock Systems, José C. B. Dubeux Jr., E. R. S. Santos, J. E. Portuguez-Acuna, L. M. D. Queiroz
Nutrient Cycling And Crop Responses On Integrated Crop-Livestock Systems, José C. B. Dubeux Jr., E. R. S. Santos, J. E. Portuguez-Acuna, L. M. D. Queiroz
IGC Proceedings (1977-2023)
Integrated crop-livestock systems (ICLS) can bring numerous benefits to crops or livestock systems, such as increase soil C sequestration, farm profitability, and provisioning of ecosystem services. In a changing world, production systems need to become more resilient and sustainable. Specialized agriculture is characterized by a high level of inputs and outputs, and oftentimes specialize in a single crop to simplify management. However, such operational systems stray away from sustainable standards. Furthermore, specialized cropping systems may face problems such as persistence of pests and diseases, loss of biodiversity, stagnant yields, development of herbicide-resistant weeds, soil erosion and consequently loss of soil …
Strategic Integration Of Grasslands Within The Agricultural Landscape: Optimizing Benefits For The Producer And Society, A. J. Duff, J. G. Franco
Strategic Integration Of Grasslands Within The Agricultural Landscape: Optimizing Benefits For The Producer And Society, A. J. Duff, J. G. Franco
IGC Proceedings (1977-2023)
We provide a case study assessment, centered in the Upper Midwest region of the United States, of the economic and environmental outcomes associated with the inclusion of grasslands within dairy production systems. This farmscape design approach can be applied at farm, watershed, and regional scales, and has the potential to significantly improve the resilience of our agricultural lands. Ruminant livestock are uniquely adapted to utilize perennial forages, and the strategic integration of grasslands within the agricultural landscape can improve producer return on investment while generating ecosystem services that benefit the production system and society.
Forage Brassica Use In New Zealand And Australia Farming Systems, A. Dumbleton, H. G. Judson
Forage Brassica Use In New Zealand And Australia Farming Systems, A. Dumbleton, H. G. Judson
IGC Proceedings (1977-2023)
Forage brassica, genus Brassica, are annual feed crops grown on farming enterprises throughout New Zealand and Australia. These crops provide a source of high-yielding, high-quality feed, which is particularly useful to complement pasture production during periods when pasture growth is reduced. There are six forage brassica species and subspecies of agricultural importance including bulb turnip, swede, kale, forage rape, leafy turnip, and raphanobrassica. All of these, as well as interspecific crosses and individual cultivars, offer a range of characteristics to fit various environmental and livestock production challenges. Consumption of forage brassica crops in ruminant animals may reduce methane emissions …
Evaluation Of Mulberry Leaf Meal Feeding On The Growth And Hematological Profile Of Cross Bred Heifers, Rohit Bishist, Irfana Quadiri, Krishan Lal Gautam, Kamal Kishore
Evaluation Of Mulberry Leaf Meal Feeding On The Growth And Hematological Profile Of Cross Bred Heifers, Rohit Bishist, Irfana Quadiri, Krishan Lal Gautam, Kamal Kishore
IGC Proceedings (1977-2023)
Mulberry (Morus alba) is a multipurpose fodder tree with a high voluntary intake. Mulberry foliage is characterized by high digestibility and excellent level of protein which makes it comparable to commercial concentrates for dairy cattle. o evaluate the effect of dietary inclusion of mulberry leaf meal as a concentrate replacement (20%) in the crossbred heifers ration the present investigation was carried out at dairy farm Dr YSPUHF Nauni Solan. In the study, a total of 12 cross bred heifers (1-2 yr) were divided into two equal groups of 6 animals each, on the basis of body weight. The …
History Of Endophytic Toxicosis And Novel Variety Solutions, J. H. Bouton
History Of Endophytic Toxicosis And Novel Variety Solutions, J. H. Bouton
IGC Proceedings (1977-2023)
Associations of Epichloe endophytes with tall fescue [Lolium arundinaceum (Schreb). Darbush.] and perennial ryegrass (Lolium perenne L.) form the basis for the known science and ecology of mutualistic, fungal endophytes, and especially their impact on livestock. In the USA, millions of acres are endophyte infected today due mainly to planting ‘Kentucky 31’ to reduce soil erosion. Health problems emerged later among animals grazing the grass. These toxicity symptoms were listed under the general term ‘Fescue Toxicosis’. Research demonstrated that ergot alkaloids produced by the mutualism were mainly responsible. Developing endophyte-free versions of major varieties reduced host grass persistence …
Comparison Of Two Low-Input Cow/Calf Production Systems On Temperate Grassland, W. B. Bryan, Mata Padrino, E. Felton, E. C. Prigge, V. W. Temu, O. J. Gekara
Comparison Of Two Low-Input Cow/Calf Production Systems On Temperate Grassland, W. B. Bryan, Mata Padrino, E. Felton, E. C. Prigge, V. W. Temu, O. J. Gekara
IGC Proceedings (1977-2023)
Two systems of grass farming were compared in an eight-year experiment in West Virginia, USA. The grassland consisted primarily of cocksfoot (Dactylis glomerara L.), Kentucky bluegrass (Poa pratensis L.), tall fescue (Festuca arundinacea Schreb.), and red (Trifolium pretense L.) and white clover (T. repens L.). The objective was to compare two systems of beef cow calf production. The experiment was a randomized complete block with two replicated treatments. The grassland of treatment 1 (system 1) was overseeded with legumes, grazing started 1 wk earlier and continued 1 wk later than treatment 2 (system 2) and …
Grazing Cover Crops In The Eastern Us: Performance Of Sheep, Goats, And Cattle Grazing Brassica Cover Crops, K. Cassida
Grazing Cover Crops In The Eastern Us: Performance Of Sheep, Goats, And Cattle Grazing Brassica Cover Crops, K. Cassida
IGC Proceedings (1977-2023)
Grazing annual forage crops has attained new interest with the increase in use of cover crops. Grazing annual forages grown as cover crops not only allows livestock producers to extend the grazing season but also gives row crop growers a way to recoup the cost of planting cover crops through grazing leases. Species in the Brassicaceae family (turnip, rape, kale, radish, and hybrids) have wide adaptability across the eastern US, excellent forage yield potential, and extremely high nutritional value. Brassicas are sometimes described as “high-moisture concentrates.” Their low effective fiber content drives the common recommendation to grow them with annual …
Extended Season Grazing On Two Ranches At Opposite Ends Of The Americas, Brett Chedzoy
Extended Season Grazing On Two Ranches At Opposite Ends Of The Americas, Brett Chedzoy
IGC Proceedings (1977-2023)
Dormant season feeding of stored forages accounts for the majority of beef cattle production expenses across the world (Geiser and Boetel 2017). Additionally, most beef cattle production and particularly cow-calf operations are relegated to less accessible and productive landscapes, which reduces access to and increases costs for stored feeds. A comparison of two cow-calf operations owned and operated by the same family in the Province of Cordoba, Argentina and State of New York, USA are offered as case studies of creative solutions to these challenges. In Argentina, appropriate stocking for year-long grazing is the key to surviving the winter dormant …
The Partial Replacement Of Perennial Ryegrass Silage With Ensiled Biorefined Perennial Ryegrass Press Cake, And Its Impact On Productivity Of Late Lactation Dairy Cows, H. Costigan, B. Lahart, M. Kennedy, T. Rumley, L. Shalloo
The Partial Replacement Of Perennial Ryegrass Silage With Ensiled Biorefined Perennial Ryegrass Press Cake, And Its Impact On Productivity Of Late Lactation Dairy Cows, H. Costigan, B. Lahart, M. Kennedy, T. Rumley, L. Shalloo
IGC Proceedings (1977-2023)
Although necessary to maintain milk production in late lactation when grass is scarce, dependency on imported concentrate has negative environmental credentials; diversifying native feeds i.e., perennial ryegrass, using biorefinery, to produce high quality by-products may be a solution (Sanders et al., 2020). To validate these suggestions, a study was undertaken on dairy cows during the winter period; 60% of a perennial ryegrass silage diet was replaced with perennial ryegrass (PRG) press cake in treatment cows (GSPC; n=20), while a perennial ryegrass silage diet was offered to control cows (GS; n=20). Cows substituted with press cake produced 9.1 and 10.5 % …
Grazing And Animal Welfare Of Dairy Cows In Europe, What Do We Know?, A. Van Den Pol-Van Dasselaar, D. Hennessy, J. Isselstein
Grazing And Animal Welfare Of Dairy Cows In Europe, What Do We Know?, A. Van Den Pol-Van Dasselaar, D. Hennessy, J. Isselstein
IGC Proceedings (1977-2023)
Grazing systems are important components of the landscape in almost all European countries. Grazing is inherently close to the nature of herbivores, but no longer applied everywhere in Europe. This paper discusses the extent of dairy cow grazing in Europe and the effect of grazing on animal welfare. The study builds on results of surveys from the European Grassland Federation (EGF) Working Group “Grazing” (WGG) in the period 2010–2022 and a focus group meeting in 2022. Data on the extent of grazing of dairy cows in Europe are provided. Europe can be divided into six distinctive regions with respect to …
Isoflavones In Legumes As Functional Forages And Feeds In Ruminant Grazing Systems, B. E. Davis, Michael D. Flythe, T. A. Hamilton, D. G. Ely, L. H. Anderson, J. R. Weinert-Nelson
Isoflavones In Legumes As Functional Forages And Feeds In Ruminant Grazing Systems, B. E. Davis, Michael D. Flythe, T. A. Hamilton, D. G. Ely, L. H. Anderson, J. R. Weinert-Nelson
IGC Proceedings (1977-2023)
Legumes are often utilized in livestock grazing systems to improve diet quality, diversity, and consequently animal performance. In addition to their nutritional utility, legumes contain phytoestrogenic isoflavones that have selective antimicrobial activity in the rumen and once absorbed can cause arterial vasodilation. These added bioactive functions of isoflavones suggest that legumes could be strategically utilized in grazing systems as functional forages to improve ruminant performance and health. The objective of this presentation will be to discuss past and current research on the application of isoflavones via legumes as an antimicrobial for growth promotion and as a mitigation strategy for fescue …
Cool-Season Annual Legumes And Forbs For Grazing And Cover Crop Systems, S. L. Dillard
Cool-Season Annual Legumes And Forbs For Grazing And Cover Crop Systems, S. L. Dillard
IGC Proceedings (1977-2023)
Annual forage legumes and non-leguminous forbs can be used to interseed into perennial forage grasses or as a short-term grazing option between row crop rotations. Diversification of cropping systems by increasing number or type of cover crops in crop rotation plays an important role in improving land-use efficiency and in promoting sustainable agriculture. Legumes and other broadleaf forages provide increased forage digestibility and crude protein as a result of their greater leaf-to-stem ratio. In the Southeast U.S, few novel cultivars have been released in the last 20 years, resulting in the reliance on only a few forage cultivars and species. …
Animal And Forage Performance Of Integrated Crop-Livestock Systems, S. L. Dillard
Animal And Forage Performance Of Integrated Crop-Livestock Systems, S. L. Dillard
IGC Proceedings (1977-2023)
Grazing of cool-season cover crops has been shown to be a viable tool for extending the grazing season while mitigating environmental risks associated with row-crop farming systems. Grazing cover crops is not novel, but most recent information available on this practice focuses on soil health as opposed to forage production and animal performance. Research has shown that forage quality of cool-season annual cover crops is sufficient to maintain an average daily gain of at least 1 kg/d and as high as 1.5 kg/d. Forage species selection plays an important role in the success of an integrated crop-livestock system. Grasses typically …
Preliminary Results: Complementary C4:C3 Grazing Systems, M. Berry, P. Keyser, S. Jagadamma, H. Nauman, K. Coffey, C. Nieman, P. Owens, A. Ashworth, E. Bisangwa
Preliminary Results: Complementary C4:C3 Grazing Systems, M. Berry, P. Keyser, S. Jagadamma, H. Nauman, K. Coffey, C. Nieman, P. Owens, A. Ashworth, E. Bisangwa
IGC Proceedings (1977-2023)
Native warm-season grasses (NWSG) can produce high quality forage and high rates of gain for beef cattle. However, little data is available on how NWSG affect the productivity of cow-calf operations on a farm scale. Therefore, we implemented an experiment at three sites, Booneville, AR, Linneus, MO and Louisville, TN, with cow-calf pairs (mature cows over ≥ 3 years old, spring calving). We evaluated two forage systems that mix either a drought or drought/flood tolerant native C4 species [big bluestem (BB) blend or eastern gamagrass (EG)] with a cool-season perennial, tall fescue (TF), and compared them to the most …
Fodder Scenario And Hortipastoral Opportunities To Enhance Fodder Production In India, Nagaratna Biradar, C. Lakshmi Devi, Vinod Kumar, Narendra S. Kulkarni, G. K. Kumar Anil, S. S. Guledagudda, A. Bheemappa
Fodder Scenario And Hortipastoral Opportunities To Enhance Fodder Production In India, Nagaratna Biradar, C. Lakshmi Devi, Vinod Kumar, Narendra S. Kulkarni, G. K. Kumar Anil, S. S. Guledagudda, A. Bheemappa
IGC Proceedings (1977-2023)
Food grain production and livestock production are closely related in India as crop-residue forms the major source of fodder for livestock. It’s thus assumed that increase in food grain production has positive effect on availability of dry matter to the livestock. Using land use classification, crop production (2015 to 2020) and livestock census (2019) data, dry matter (DM) availability for livestock for 28 states of India was estimated. Hortipastoral opportunities by estimating area available under orchards in southern India were done to assess the possibility of introducing fodder crops in orchards. Some of the fodder crops were introduced in orchards …
Productivity And Variability Of Pastures And Cover Crops In Lowland Rice-Pasture Rotations In Uruguay, Walter Ayala, J. Terra
Productivity And Variability Of Pastures And Cover Crops In Lowland Rice-Pasture Rotations In Uruguay, Walter Ayala, J. Terra
IGC Proceedings (1977-2023)
No abstract provided.
Cripping Girlhood On Service Dog Tok, Anastasia Todd
Cripping Girlhood On Service Dog Tok, Anastasia Todd
Gender and Women's Studies Faculty Publications
This article explores how disabled girl handlers crip girlhood on service dog tok, the emergent subculture on TikTok comprised of disabled handlers who upload and post videos about their everyday life in partnership with a service dog. Looking at the TikTok accounts and self-representational practices of three disabled girl handlers—Ava of @avaandcheddar, Claire of @rosie.the.sd, and Lexy of @muslimservicedogmom28—this article traces how their videos evince an audio–visual representation of interspecies intimacy, a becoming with, that complicates the familiar story of the disabled girl handler/service dog dyad that one might see or scroll past online—one of rehabilitative exceptionalism, disability disavowal, and …
Forage News [2024-02], University Of Kentucky
Alzheimer’S Disease And Inflammatory Biomarkers Positively Correlate In Plasma In The Uk-Adrc Cohort, Kate E. Foley, Zachary Winder, Tiffany L. Sudduth, Barbara J. Martin, Peter T. Nelson, Gregory Jicha, Jordan P. Harp, Erica M. Weekman, Donna M. Wilcock
Alzheimer’S Disease And Inflammatory Biomarkers Positively Correlate In Plasma In The Uk-Adrc Cohort, Kate E. Foley, Zachary Winder, Tiffany L. Sudduth, Barbara J. Martin, Peter T. Nelson, Gregory Jicha, Jordan P. Harp, Erica M. Weekman, Donna M. Wilcock
Neurology Faculty Publications
INTRODUCTION: Protein-based plasma assays provide hope for improving accessibility and specificity of molecular diagnostics to diagnose dementia. METHODS: Plasma was obtained from participants (N = 837) in our community-based University of Kentucky Alzheimer’s Disease Research Center cohort. We evaluated six Alzheimer’s disease (AD)- and neurodegeneration-related (Aβ40, Aβ42, Aβ42/40, p- tau181, total tau, and NfLight) and five inflammatory biomarkers (TNF𝛼, IL6, IL8, IL10, and GFAP) using the SIMOA-based protein assay platform. Statistics were performed to assess correlations. RESULTS: Our large cohort reflects previous plasma biomarker findings. Relationships between biomarkers to understand AD–inflammatory biomarker correlations showed significant associations between AD and inflammatory …
Cold-Inducible Rna Binding Protein Impedes Breast Tumor Growth In The Pymt Murine Model For Breast Cancer, Daniel A. Lujan, Joey L. Ochoa, Ellen J. Beswick, Tamara A. Howard, Helen J. Hathaway, Nora I. Perrone-Bizzozero, Rebecca S. Hartley
Cold-Inducible Rna Binding Protein Impedes Breast Tumor Growth In The Pymt Murine Model For Breast Cancer, Daniel A. Lujan, Joey L. Ochoa, Ellen J. Beswick, Tamara A. Howard, Helen J. Hathaway, Nora I. Perrone-Bizzozero, Rebecca S. Hartley
Markey Cancer Center Faculty Publications
RNA binding proteins (RBPs) post-transcriptionally regulate gene expression by associating with regulatory sequences in the untranslated regions of mRNAs. Cold-inducible RBP (CIRP) is a stress-induced RBP that was recently shown to modulate inflammation in response to cellular stress, where it increases or decreases pro-tumorigenic (proinflammatory) cytokines in different contexts. CIRP expression is altered in several cancers, including breast cancer, but the effects of CIRP on inflammation in breast cancer is not known. Here, we investigate if CIRP alters growth and the inflammatory profile of breast tumors. Transgenic mice overexpressing CIRP in the mammary epithelium were crossed with the PyMT mouse …
Designing Dual-Purpose Management Strategies For Sheep Production And Pollinators In Dryland Pastures, Mia Caudillo, Andony Melathopoulos, Mary Smallman, Sarah A. Kinkaid, David E. Prado-Tarango, Serkan Ates
Designing Dual-Purpose Management Strategies For Sheep Production And Pollinators In Dryland Pastures, Mia Caudillo, Andony Melathopoulos, Mary Smallman, Sarah A. Kinkaid, David E. Prado-Tarango, Serkan Ates
IGC Proceedings (1977-2023)
Development of novel grazing management practicesfor both livestock production and pollinator health is becoming increasingly crucial in pasture-based farming systems. The effect of pasture type and spring closing dates on lamb liveweight gain, pasture production, botanical composition, bloom density and bee visitation was monitored over 2 years at the Oregon State University in Corvallis. Total annual dry matter yield (DMY) of diverse pastures in 2020/2021 was 8.8 t DM ha-1 and this was greater (P-1) and legume pastures (6.6 t DM ha-1). In successive years, lambs grew faster in legume pastures (287, 215 g per head d …
Tillering Of ‘Marandu’ Brachiaria Under Different Nitrogen Rates In The Brazilian Savannah, A. B. O. Assis, A. L. Bocchi, T. C. Pedrosa, A. O. Matos, A. P. B. Soares
Tillering Of ‘Marandu’ Brachiaria Under Different Nitrogen Rates In The Brazilian Savannah, A. B. O. Assis, A. L. Bocchi, T. C. Pedrosa, A. O. Matos, A. P. B. Soares
IGC Proceedings (1977-2023)
The tiller is the basic unit of grass growth and tiller density determines the horizontal ground cover, leaves production and pastures perennially. The objective in this study was to quantify the number of aerial and basal tillers and basal:aerial tillers ratio in Urochloa brizantha cv. Marandu, established in Brazilian savannah, submitted to nitrogen doses (0, 50, 100 and 150 kg N/ha). The experiment was carried out in the Forage and Pasture Sector of Jataí Federal University (UFJ) and after soil correction and fertilization, plots were established with Marandu palisade grass in a randomized block design, with four replications and four …
Effect Of Soil Source And Variety On The Heavy Metal Contents Of Guinea Grass, C. C. Anotaenwere, P. O. Bankole, P. A. Dele, Alaba O. Jolaosho
Effect Of Soil Source And Variety On The Heavy Metal Contents Of Guinea Grass, C. C. Anotaenwere, P. O. Bankole, P. A. Dele, Alaba O. Jolaosho
IGC Proceedings (1977-2023)
The aim of this study was to evaluate the heavy metal content in soils and grasses planted on selected contaminated soils. The study was a 3 x 2 factorial experiment in a completely randomized design comprising of two factors which are: 3 soil sources (i.e., industrial site, dump site and Fadama (a lowland around a river/stream) which was used as the control) and 2 varieties of Megathyrsus maximus (var. Local and Ntchisi) replicated four times. Soils were collected from the three sites and planting was done in a greenhouse. Soil samples were collected before and after planting. Samples of the …
Effect Of Nitrogen Source And Age At Harvest On The In Vitro Digestibility Of Oba Super Ii Maize Fodder, C. C. Anotaenwere, P. A. Dele, F. E. Salawu, B. T. Akinyemi, O. A. Okukenu, Alaba O. Jolaosho
Effect Of Nitrogen Source And Age At Harvest On The In Vitro Digestibility Of Oba Super Ii Maize Fodder, C. C. Anotaenwere, P. A. Dele, F. E. Salawu, B. T. Akinyemi, O. A. Okukenu, Alaba O. Jolaosho
IGC Proceedings (1977-2023)
This experiment was carried out in the Pasture Section of the Directorate of University farms and the laboratory of Department of Pasture and Range Management, Federal University of Agriculture, Abeokuta, Nigeria, to evaluate the effect of nitrogen source (Swine manure, N.P.K. 15:15:15 as well as the control) and age at harvest on the in vitro gas production and digestibility of Oba Super II maize fodder. The experiment was in a split plot design. The nitrogen source was applied at the rate of 120 kgN/ha two weeks after planting. Maize was harvested at 8, 10 and 12 weeks after planting, oven …
Harvest Time Determine Biomass And Nutritive Value Of Forage Soybean In The Northwestern Loess Plateau Of China, An Dong, Jean Marie Vianney Nsigayehe, Y. Y. Shen
Harvest Time Determine Biomass And Nutritive Value Of Forage Soybean In The Northwestern Loess Plateau Of China, An Dong, Jean Marie Vianney Nsigayehe, Y. Y. Shen
IGC Proceedings (1977-2023)
Soybean is a critical legume crop, which can be used as high protein forage in a crop-forage rotation system to supplement forage and increase system productivity. According to the actual production demand, selecting a suitable harvest time and the best feeding variety of soybean can provide a theoretical basis for applying forage soybean in a rotation system. In this study, four forage soybean varieties were selected in the Loess Plateau of northwest China. They were harvested on three dates suitable for local rotation conditions, and their biomass and nutritive value were evaluated. At the early harvest (20 August), the nutritive …
Phyllochron And Growth Dynamic Of Lolium Perenne L. And Bromus Valdivianus Phil. As Affected By Soil Ph, Phosphorus And Nitrogen Restriction, Oscar A. Balocchi, M. F. Alonso, I. Calvache
Phyllochron And Growth Dynamic Of Lolium Perenne L. And Bromus Valdivianus Phil. As Affected By Soil Ph, Phosphorus And Nitrogen Restriction, Oscar A. Balocchi, M. F. Alonso, I. Calvache
IGC Proceedings (1977-2023)
Permanent grasslands are the main food for livestock production systems in Southern Chile. Therefore, it is essential to develop management tools that optimize the use of pastures. Among these tools, the phyllochron could be a better method to control grazing frequency. The aim of this study was to determine the effect of three levels of soil pH, phosphorus (P) and nitrogen (N) on the phyllochron and growth dynamic of Lolium perenne and Bromus valdivianus. Nine monophytic mini-swards of each species were established in 125 L containers for three different pH, P and N levels. For one year we measured: …
Mass Production And Morphology Of Marandu Brachiaria Under Different Nitrogen Rates In The Brazilian Savannah, V. L. Banys, A. O. Matos, A. L. Bocchi, I. I. Silva, L. V. D. Ribeiro
Mass Production And Morphology Of Marandu Brachiaria Under Different Nitrogen Rates In The Brazilian Savannah, V. L. Banys, A. O. Matos, A. L. Bocchi, I. I. Silva, L. V. D. Ribeiro
IGC Proceedings (1977-2023)
Nitrogen is the nutrient that most contributes to increase forage productivity and quality. The objective was to evaluate Marandu brachiaria submitted to nitrogen doses in the Brazilian savannah through the total and green mass production, leaf:stem and brachiaria:weed ratio. Plots were established in a randomized block design, with four replications and four N doses 0, 50, 100 and 150 kg N/ha). After the uniformization cut, the data collect cycles occurred when the canopy reached 30 cm average height. Samples were taken until 15 cm from the ground in an area of 0.25 m2. Fractions were separated according botanical …
Grazing Management For Alfalfa Persistence And Productivity In Warm-Climate Regions, D. Basigalup
Grazing Management For Alfalfa Persistence And Productivity In Warm-Climate Regions, D. Basigalup
IGC Proceedings (1977-2023)
Alfalfa is the most important cultivated forage crop in Argentina, where about 3 million hectares are grown. Even though the use of direct grazing is coming down during the last 15 years, it is still important for both beef and dairy production. Alfalfa grazing can play an important role in reducing operative costs and decreasing quality loss due to forage conservation (hay or silage). In this paper, the main concepts necessary to implement adequate and practical rotational grazing systems are briefly discussed. Particular attention is given to issues such as grazing frequency, grazing period, pasture use efficiency, and alfalfa quality …
Genetic Variability Of Lucerne Landraces From Central Italy Detected By Rapd Markers, L Russi, G Barcaccia, M Falcinelli, F Veronesi
Genetic Variability Of Lucerne Landraces From Central Italy Detected By Rapd Markers, L Russi, G Barcaccia, M Falcinelli, F Veronesi
IGC Proceedings (1977-2023)
With the aim to characterize six lucerne landraces (Medicago sativa L.), representing a sample of a collection from central Italy, sixty individuals per landrace were evaluated by screening for RAPD markers with three lucerne-specific primers. Twenty-one amplification products were scored as present or absent across all plants. The dendrogram from mean genetic similarity estimates displayed Casalina alone and the other landraces clustered into one distinct group, showing a single branch point with more than 73% of genetic similarity. The discriminant analysis grouped the landraces in a similar manner. The first function maximally separated the group Grosseto, Gubbio and C. …
Amphicarpic Legumes For Tropical Pasture Persistence, R Schultze-Kraft, A Schmidt, H Hohn
Amphicarpic Legumes For Tropical Pasture Persistence, R Schultze-Kraft, A Schmidt, H Hohn
IGC Proceedings (1977-2023)
Amphicarpy, by which a plant produces underground seeds in addition to aerial fruits, is found in many plant families and in species of at least 15 legume genera. First studies on the tropical Centrosema rotundifolium and subtropical Macroptilium panduratum revealed for both species, besides their stoloniferous growth habit, two important mechanisms for survival under unfavorable conditions: (1) Underground meristems and reserve organs, and (2) regeneration from a soil seed reserve based on underground, aerial-flowering independent, seed production. Underground seed production was for both species particularly high on very sandy soils, but amphicarpy enables the plants to exhibit a plasticity response …