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Articles 22051 - 22080 of 241129

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Neural Circuits Expressing The Serotonin 2c Receptor Regulate Memory In Mice And Humans, Hesong Liu, Yang He, Hailan Liu, Bas Brouwers, Na Yin, Katherine Lawler, Julia M Keogh, Elana Henning, Dong-Kee Lee, Meng Yu, Longlong Tu, Nan Zhang, Kristine M Conde, Junying Han, Zili Yan, Nikolas A Scarcelli, Lan Liao, Jianming Xu, Qingchun Tong, Hui Zheng, Zheng Sun, Yongjie Yang, Chunmei Wang, Yanlin He, I Sadaf Farooqi, Yong Xu Jun 2024

Neural Circuits Expressing The Serotonin 2c Receptor Regulate Memory In Mice And Humans, Hesong Liu, Yang He, Hailan Liu, Bas Brouwers, Na Yin, Katherine Lawler, Julia M Keogh, Elana Henning, Dong-Kee Lee, Meng Yu, Longlong Tu, Nan Zhang, Kristine M Conde, Junying Han, Zili Yan, Nikolas A Scarcelli, Lan Liao, Jianming Xu, Qingchun Tong, Hui Zheng, Zheng Sun, Yongjie Yang, Chunmei Wang, Yanlin He, I Sadaf Farooqi, Yong Xu

Children’s Nutrition Research Center Staff Publications

Declined memory is a hallmark of Alzheimer’s disease (AD). Experiments in rodents and human postmortem studies suggest that serotonin (5-hydroxytryptamine, 5-HT) plays a role in memory, but the underlying mechanisms are unknown. Here, we investigate the role of 5-HT 2C receptor (5-HT2CR) in regulating memory. Transgenic mice expressing a humanized HTR2C mutation exhibit impaired plasticity of hippocampal ventral CA1 (vCA1) neurons and reduced memory. Further, 5-HT neurons project to and synapse onto vCA1 neurons. Disruption of 5-HT synthesis in vCA1-projecting neurons or deletion of 5-HT2CRs in the vCA1 impairs neural plasticity and memory. We show that a selective 5-HT2CR agonist, …

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Productivity And Genotypic Diversity Of Trifolium Ambiguum In The Central Caucasian Mountains, Georgia, R G. Patterson, P R. Espie Jun 2024

Productivity And Genotypic Diversity Of Trifolium Ambiguum In The Central Caucasian Mountains, Georgia, R G. Patterson, P R. Espie

IGC Proceedings (1977-2023)

Trifolium ambiguum occurred in12 diverse grassland communities, ranging from 1700 m to 2850 m, in the Kasbegi region, Central Caucasus. Total herbage mass in mid summer ranged from 310 to 763 g/m2with T. ambiguum composition ranging from 0.5 to 51%. Maximum T. ambiguum production occurred in fertile, regularly mown hay meadows, but was reduced in severely grazed pastures. It has persisted in these communities after centuries of grazing or cutting, without fertiliser input. T. ambiguum ploidy levels were predominantly diploid (82% frequency of occurrence), often in conjunction with triploid (18%) or tetraploid (27%) genotypes. The triploid T. ambiguum genotype ( …

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Nitrogen Nutrition Of Brant (Branta Bernicla L.) Grazing On Saltmarsh And Pasture Species, G Q.A Anderson, M Andrews, S M. Percival, J S. Kirby Jun 2024

Nitrogen Nutrition Of Brant (Branta Bernicla L.) Grazing On Saltmarsh And Pasture Species, G Q.A Anderson, M Andrews, S M. Percival, J S. Kirby

IGC Proceedings (1977-2023)

Captive brant Branta bernicla were fed a range of food plants to determine their ability to digest nitrogen and specifically soluble protein. Soluble protein levels in droppings were only a small fraction of those in plants, indicating substantial uptake or conversion. For white clover Trifolium repens L., uric acid content indicated that at least 50% of excreted nitrogen had been metabolised, strongly suggesting that a substantial fraction of soluble protein is utilised by the geese. Carbon/nitrogen ratios increased from plants to droppings while carbon/hydrogen ratios remained nearly constant indicating greater uptake of nitrogen relative to carbon. T. repens was found …

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Evaluation Of Morphological, Biological And Chemical Properties For Breeding On New Fodder-Grass Cultivars, S Kozlowski, B Golinska, P Golinski Jun 2024

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 …

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Alfalfa Seeding Patterns And Their Relations With Vegetative And Reproductive Development, R B. Medeiros, A.V A. Jacques, C Nabinger Jun 2024

Alfalfa Seeding Patterns And Their Relations With Vegetative And Reproductive Development, R B. Medeiros, A.V A. Jacques, C Nabinger

IGC Proceedings (1977-2023)

This study was conducted to understand how plant density (17, 61 and 89 plants m-2) and row spacing (30 and 90 cm) affect plant development and the consequences on potential seed yield (PSY) and agricultural realized seed potential (ARSP) of alfalfa (Medicago sativa L.) in south Brazil. Both variables were not affected by row spacing but were negatively correlated to plant population. This was a consequence of a higher allocation of assimilates to reproductive structures at low plant competition, denoted by a positive correlation between these two variables and reproductive parts growth rate. Despite the benefits of the low plant …

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Ecological Site Database- Basic Site Information For Resource Analysis And Decision Making, S L. Ekblad, J R. Carlson, W R. Oaks Jun 2024

Ecological Site Database- Basic Site Information For Resource Analysis And Decision Making, S L. Ekblad, J R. Carlson, W R. Oaks

IGC Proceedings (1977-2023)

The USDA Natural Resource Conservation Service (NRCS) describes and interprets range, native pasture, grazable forest, pasture, and hayland with ecological site descriptions and forage suitability groups. Ecological sites have evolved from agency range and woodland site descriptions, and have integrated alternate and more recent concepts with the traditional succession-retrogression model for site classification and interpretation. Ecological site interpretations are based on vegetation sampling by weight and composition, and other field data collection. Sample data is recorded and managed in the Ecological Site Information System (ESIS) and is analyzed to identify and develop site and suitability group descriptions. ESIS provides data …

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Validation Of Arachis Pintoi As A Forage Legume In Commercial Dual Purpose Cattle Farms In Forest Margins Of Colombia, C E. Lascano, G A. Ruiz, J Valasquez, J Rozo Jun 2024

Validation Of Arachis Pintoi As A Forage Legume In Commercial Dual Purpose Cattle Farms In Forest Margins Of Colombia, C E. Lascano, G A. Ruiz, J Valasquez, J Rozo

IGC Proceedings (1977-2023)

An on-farm pilot project was initiated in the Andean piedmont of the Amazon basin in Caquetá, Colombia to determine the contribution of the forage peanut Arachis pintoi (CIAT 17434) introduced in degraded pastures to animal production and soil improvement. Early results show that milk production in dual purpose cattle farms can be increased by 20% with A. pintoi-based pastures. However, to enhance adoption of the legume by farmers there is a need to make adjustments on pasture management and assure supply of high quality seed in the region.

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The Evolving International Grassland Congress, L R. Humphreys Jun 2024

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.

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Strategies For Forage Research And Transfer In India, R P. Singh, Bhag Mal Jun 2024

Strategies For Forage Research And Transfer In India, R P. Singh, Bhag Mal

IGC Proceedings (1977-2023)

The debate on how to meet the yawning gap of forage and feed (both in terms of quantity and quality) in India has continued since the last decade. This paper is an effort to discuss the feed and forage deficit, harnessing of unexploited resources (arable and non-arable) and the strategies of forage research and extension support for the development of forage and feed sector.

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Changes In The Distribution Of Carbohydrates Due To Water Stress And Root-Shoot Ratio As An Index Of Drought Resistance In Ecotypes Of Adesmia Bicolor (Poir.) D.C., B G. Neves-Piestun, Armando Olano, Dan Piestun Jun 2024

Changes In The Distribution Of Carbohydrates Due To Water Stress And Root-Shoot Ratio As An Index Of Drought Resistance In Ecotypes Of Adesmia Bicolor (Poir.) D.C., B G. Neves-Piestun, Armando Olano, Dan Piestun

IGC Proceedings (1977-2023)

The genera Adesmia, is found in the “El Plata” area. Adesmia bicolor (Poir). D.C. is one of the most common species in Uruguay that belongs to this genera. In this study, three ecotypes were collected from different kinds of environments. Ecotypes 016, 2316 and 7017, came from superficial-soil, clay-soil and sandy soil, respectively. The ecotypes of Adesmia bicolor (Poir.) DC. were studied under water-stress conditions (two levels), during two stages: vegetative phase and beginning of blossom. In both stages, leaf-water potential (LWP), leaf-relative-water content (LRWC), leaf-dry matter (LDM), stem-dry matter (SDM) and root-dry matter (RDM) were measured, while root-shoot ratio …

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A Comparison Of Steer Gains On Cunningham Leucaena And Some Alternative Psyllid-Tolerant Shrub Legumes, R J. Jones, B Palmer Jun 2024

A Comparison Of Steer Gains On Cunningham Leucaena And Some Alternative Psyllid-Tolerant Shrub Legumes, R J. Jones, B Palmer

IGC Proceedings (1977-2023)

Five shrub legumes, Leucaena leucocephala cv.Cunningham, L. leucocephala cv.Tarramba, L. diversifolia CPI 33820, L. pallida CQ 3439 and Calliandra calothyrsus CPI 115690 were compared for yield and steer gain in comparison to an all-grass control. Shrubs were sown in rows 4 m apart and all treatments, including the control, were sown with the grass Urochloa mosambicensis cv.Nixon. Edible legume yield was highest for L. leucocephala cv.Tarramba and lowest for L. leucocephala cv.Cunningham. In the absence of psyllid attack, liveweight gains over a 5-week period in summer were highest with cv.Cunningham (1170g/d) and lowest for C. calothyrsus (391 g/d) and the …

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Grazing Impacts On The Production Stability Of Fescue Prairie, W D. Willms, J F. Dormaar, J R. King Jun 2024

Grazing Impacts On The Production Stability Of Fescue Prairie, W D. Willms, J F. Dormaar, J R. King

IGC Proceedings (1977-2023)

The fescue prairie in southwestern Alberta is highly productive but susceptible to grazing during the growing season. This study examined how production stability is affected by grazing impact. It was initiated in 1949 using four fixed stocking rates (1.2, 1.6, 2.4, 4.8 animal-unitmonths ha-1). Forage and livestock production were estimated over 4 or 15 years, respectively. The coefficient of variation (CV) for either primary or secondary production was constant over all rates except for the very heavily stocked paddock. Forage production, and therefore livestock production, in that paddock was dependent on precipitation during the growing season. Heavy grazing pressure resulted …

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Dry Matter Allocation And Nutritive Value Of Tropical And Temperate Fodder Trees And Shrubs In The Gauteng Province Of South Africa, J P. Lindeque, N.F G. Rethman, C C. Botha Jun 2024

Dry Matter Allocation And Nutritive Value Of Tropical And Temperate Fodder Trees And Shrubs In The Gauteng Province Of South Africa, J P. Lindeque, N.F G. Rethman, C C. Botha

IGC Proceedings (1977-2023)

Fodder tree and shrub species from the genera Albizzia, Atriplex, Cassia, Chamaecytisus, Cytisus, Leucaena, Lupinus, Medicago, Sesbania and Teline were evaluated in terms of their adaptation to local conditions and potential production of protein-rich forage and fuelwood. Atriplex nummularia, Cassia sturtii, Chamaecytisus palmensis, Cytisus maderiensis, Leucaena species, Sesbania sesban and Teline stenopetala offer considerable potential, both in terms of yield of protein-rich forage and/or fuelwood.

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Native Grasses In The Pilbara Region, Australia; Resource Acquisition, Allocation And Growth, L J. Ingram, L T. Bennett, M A. Adams Jun 2024

Native Grasses In The Pilbara Region, Australia; Resource Acquisition, Allocation And Growth, L J. Ingram, L T. Bennett, M A. Adams

IGC Proceedings (1977-2023)

Biomass production and nitrogen content of the native perennial grasses, Barley Mitchell grass (Astrebla pectinata ) and Kangaroo grass (Themeda triandra), were studied over the 1996 growing season. After 160 mm of rain, the biomass of T. triandra increased from 2 to 4 t/ha, while A. pectinata increased from 1.1 to 1.5 t/ha. N in aboveground biomass of T. triandra increased from 14.5 to 17 kg/ha and of A. pectinata from 8.5 to 10 kg/ha. A. pectinata leaves senesced quickly increasing the total amount of N in dead leaves. T. triandra senesced more slowly but dead leaves …

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The Effect Of Different Winter Utilization Periods Of A C4 Subtropic Foggage On The Growth Of Weaners, I F. Reckling, G.H J. Kruger Jun 2024

The Effect Of Different Winter Utilization Periods Of A C4 Subtropic Foggage On The Growth Of Weaners, I F. Reckling, G.H J. Kruger

IGC Proceedings (1977-2023)

A significant (P<0.05) increase in lick consumption was found, as winter progressed, which was attributed to a significant decline in the quality (P<0.05) of Digitaria eriantha foggage. Harvested treatments resulted in a significant (P<0.05) decline in residual soil nitrogen levels compared to unharvested treatments. Losses, due to trampling, on average was 21.25%. It is advocated that Digitaria eriantha ought to be utilised in summer and is only suitable for maintenance if utilised in winter.

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Leucaena Leucocephala As A Supplement For Goats On Tropical Pastures, T Clavero, R Razz Jun 2024

Leucaena Leucocephala As A Supplement For Goats On Tropical Pastures, T Clavero, R Razz

IGC Proceedings (1977-2023)

A field experiment was conducted in the dryland farming area of Northwest Venezuela in order to evaluate three diets in grazing goats (pasture only; grazing pasture + 0.3 kg of commercial concentrate/ animal/d; grazing pasture + restricted grazing for 2 hours daily in Leucaena leucocephala) on milk production (mp) and milk composition (fat -f- and mineral concentration -mc-). The experiment was laid out as randomized block design. The data showed significant difference (P<0.05) between treatments. Milk production increased in 50 and 70% when goats had access to commercial concentrate or Leucaena graizing as well as grass pasture compared with the control treatment. Milk production in goats with access to Leucaena was insignificantly different than goats on concentrate. Treatments did not affect milk composition. The results suggest that Leucaena leucocephala can supply an adequate amount of nutrient with similar value to commercial concentrate for milk production in grazing goats.

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Evaluation Of The Chemical Composition Of Some Locally Available Acacia Seeds As Animal Feed In Botswana, A A. Aganga, C M. Tsopito Jun 2024

Evaluation Of The Chemical Composition Of Some Locally Available Acacia Seeds As Animal Feed In Botswana, A A. Aganga, C M. Tsopito

IGC Proceedings (1977-2023)

Two separate studies were conducted using indigenous browse seeds. In the first study, seeds from nine locally available Acacia trees were analysed for proximate composition, fatty acid composition and in vitro dry matter digestibility. Nutrient composition of the seeds varied in crude protein from 12.52% for Acacia robusta to 21.82% for Acacia erubescens. Ash content ranged from 3.20% to 4.75%. The in vitro dry matter digestibility ranged from 46.00% for Acacia rehmanniana to 62.00% for Acacia erubescens. Fatty acids present in the seeds included palmitic, linoleic and oleic acids. The second study was to evaluate the influence of processing on …

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Salt Tolerance In Herbage And Its Application To Greening The Desert, Y Maeda, T Otani, K Ogiwara, S Murai, H Takenaga Jun 2024

Salt Tolerance In Herbage And Its Application To Greening The Desert, Y Maeda, T Otani, K Ogiwara, S Murai, H Takenaga

IGC Proceedings (1977-2023)

Canadian peat moss was used as water holding material and the efficacy of mixing the peat with the sand on water holding capacity of the sand, and the adaptability of alfalfa (AL), burmudagrass (BG), bahiagrass(BH), weeping lovegrass (WL) and Japanese lawngrass(JL) to dry and saline conditions were investigated. Without mixing peat, pF value of the sand did not change for 6 days after watering, but rose markedly up to 2.9 after 18 days. With mixing peat at the rate of 2% by the sand weight, the value did not change for 20 days, and rose gradually up to 2.5 on …

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Forage Yields Of Simple Mixtures Of Selected Genotypes Of Grasses And Adapted Herbaceous Legumes In Southwest Nigeria, I Ezenwa, M E. Aken'ova Jun 2024

Forage Yields Of Simple Mixtures Of Selected Genotypes Of Grasses And Adapted Herbaceous Legumes In Southwest Nigeria, I Ezenwa, M E. Aken'ova

IGC Proceedings (1977-2023)

Three tropical grasses viz. Guinea grass (Panicum maximum Jacq), elephant grass (Pennisetum purpureum Schum) and star grass (Cynodon nlemfuensis Vanderyst) and three herbaceous legumes viz. Verano stylo (Stylosanthes hamata (L) Taub), centro (Centrosema pubescens Benth) and tropical kudzu (Pueraria phaseoloides (Roxb) Benth) were evaluated for their dry matter (DM) yield potential in mixtures and sole stands. Annual DM yields of Verano stylo in mixtures with star grass, Guinea grass and elephant grass as well as tropical kudzu mixtures with Guinea grass and elephant grass varied between 13.2 and 14.2 t/ha. These yields were similar to …

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The Productivity And Botanical Composition Of Permanent, Temporary And Slot Seeded Grassland, J Fiala, J Gaisler, V Pavlu Jun 2024

The Productivity And Botanical Composition Of Permanent, Temporary And Slot Seeded Grassland, J Fiala, J Gaisler, V Pavlu

IGC Proceedings (1977-2023)

The development of botanical composition and primary production was followed from 1993 to 1995 at the southern side of the Jizera Mountains on three-cutting permanent, temporary and slot seeded grassland. Each grassland type was divided into 4 variants with various doses of mineral fertilization. The same clover-grass mixture composed of 5 components were used for the renovation by ploughing and slot seeding. During three years of the observation a very fast drop of the clover portion for the benefit of grass species and herbs was noted especially by the renewed grassland. Also sown grass species in the renewed grassland declined …

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Galega Orientalus Lam. Var "Gale" New Legume, Protein And Perennial Fodder Crop In Fr Yugoslavia, B Radenovic Jun 2024

Galega Orientalus Lam. Var "Gale" New Legume, Protein And Perennial Fodder Crop In Fr Yugoslavia, B Radenovic

IGC Proceedings (1977-2023)

In our four-year research, (Galega orientalis Lam.) Var. “GALE” grown in the region of North Backa, FR Yugoslavia, gave a considerably higher yield in green mass, hay, crude protein content, crude fat content, ash and dry matter contents, compared to control plant (average of the 1991/96 trials). During hay stacking, leaves did not fall off, which is a very favorable property.

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Cutting Date Effects Of Yield And Quality Of Unimproved Kudzu (Pueraria Lobata (Willd.) Ohwi.), T H. Terrill, S Gelaye, S Mahotiere, E A. Amoah, S Miller, W R. Windham Jun 2024

Cutting Date Effects Of Yield And Quality Of Unimproved Kudzu (Pueraria Lobata (Willd.) Ohwi.), T H. Terrill, S Gelaye, S Mahotiere, E A. Amoah, S Miller, W R. Windham

IGC Proceedings (1977-2023)

Kudzu (Pueraria lobata (Willd.) Ohwi.), a vigorous, perennial warmseason legume, is considered a weed in the southern United States. It is tolerant of drought and low soil fertility and has potential as a low-input forage for livestock production. A field experiment tested effects of cutting date on yield and nutritive value of an unimproved stand of kudzu (10-15 yr old) in central Georgia. Yield measurements were made in June, July, September, and November, 1994, with forage samples taken to determine quality parameters. Soil fertility was unaffected by cutting treatment. Whole plant and leaf dry matter (DM) production and crude …

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Long Term Weed Management Effects In Alfalfa, Randy Dovel, Mylen Bohle Jun 2024

Long Term Weed Management Effects In Alfalfa, Randy Dovel, Mylen Bohle

IGC Proceedings (1977-2023)

Five herbicide treatment regimes were applied to spring and fall seeded alfalfa from 1991 to 1995 at two locations, Klamath Falls and Powell Butte, Oregon. Treatments were evaluated by measuring alfalfa crown and weed stand counts, yield, weed content and forage quality of all cuttings each year. Weed control treatment did not affect hay yield at Klamath Falls. Severe weed competition in 1991 caused lower yields in untreated plots in 1992 at Powell Butte. Weed growth was most pronounced in the first cutting at both sites. The presence of weeds did not adversely affect forage quality in any cutting except …

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Effect Of Frequency And Intensity Of Defoliation On Oat- Vetch Mixture, M J. Arzadun, M H. Vallejos, M M. Piersanti Jun 2024

Effect Of Frequency And Intensity Of Defoliation On Oat- Vetch Mixture, M J. Arzadun, M H. Vallejos, M M. Piersanti

IGC Proceedings (1977-2023)

An experiment was conducted to evaluate the effect of different cutting regimes on productivity and complementarity between oat and vetch in a mixture. The treatments were allocated in a factorial design on a split-split-plot disposition: they were 3 cutting frequencies (each 35, 70 and 105 days), 3 cutting heights (2, 8 and 14 cm above ground) and 3 crops (oat, vetch and the 1:1 mixture). Forage production (dry matter per hectare) and complementarity between species Relative Yield Total (RYT) were evaluated. The highest forage production (p- 0.05) was obtained with a cutting height of 2 cm and a frequency of …

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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 Jun 2024

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.

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Productivity Of Grasses In A Pasture In The Cerrado Area Of The "Triangulo Mineiro", I F. Andrade, M A. Oliveira Jun 2024

Productivity Of Grasses In A Pasture In The Cerrado Area Of The "Triangulo Mineiro", I F. Andrade, M A. Oliveira

IGC Proceedings (1977-2023)

A grazing trial using guinea and coloniao (Panicum maximum), setaria (Setaria sphacelata), andropogon (Andropogon gayanus), and signalgrass (Brachiaria decumbens) was conducted during three grazing cycles: 1st cycle - Apr. 5, 1984 to Jul. 23, 1984; 2nd - Dec. 4, 1984 to Oct. 30, 1985 and 3rd - Jan. 16, 1986 to Jan. 15, 1987. It was also used with four stocking rates- T1= 0.8, T2= 1.0, T3= 1.2, and T4= 1.4 animal units/ha (AU/ha). In the 2nd period signalgrass was discarded because of poor condition of the pastures, and in the last grazing cycle …

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Legume-Legume Complementary For Sustainable Pasture Development In The Tropics, M Peters, S A. Tarawali, R Schultze-Kraft, A Musa Jun 2024

Legume-Legume Complementary For Sustainable Pasture Development In The Tropics, M Peters, S A. Tarawali, R Schultze-Kraft, A Musa

IGC Proceedings (1977-2023)

The use of legume-legume mixtures to alleviate limitations of individual species in legume based technologies was investigated in subhumid Nigeria. The results indicate the potential of legume mixtures, through processes of complementation and compensation, to reduce the risk of legume establishment and survival and thus ensure sustainable legume yields and percentages. The implications for on-farm adoption of forage legumes are discussed.

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Growth Of Heifers And Changes In Vegetation In A Natural Grassland Oversown With Caribbean Stylo, Vinod Shankar, J N. Gupta, V S. Upadhyay Jun 2024

Growth Of Heifers And Changes In Vegetation In A Natural Grassland Oversown With Caribbean Stylo, Vinod Shankar, J N. Gupta, V S. Upadhyay

IGC Proceedings (1977-2023)

The paper reports a three year study on the growth of heifers and vegetational changes in a natural grassland oversown with caribbean stylo and grazed in a deferred- rotational grazing system. There were two feeding treatments. One set of grazing heifers was given common salt only. The other set of heifers were given supplemental feeding of leucaena green @4 per cent or Leucaena hay @ 1 per cent body weight. The supplemental feeding of leucaena was beneficial in terms of body weight gain particularly during the dry summer months. Population of the caribbean stylo oversown in natural Sehima- Heteropogon …

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Productivity Of Silphium Perfoliatum L. In Low Input Agricultural Systems, G Pichard, R Cussen, F Moore Jun 2024

Productivity Of Silphium Perfoliatum L. In Low Input Agricultural Systems, G Pichard, R Cussen, F Moore

IGC Proceedings (1977-2023)

There is a large area in the coastal region of southern Chile affected by low productivity of soils and severe climatic limitations, which is owned mainly by small farmers. This research was conducted with dairy farmers producing an average of 20,000 liters/year whose main problem is cattle underfeeding because of severe seasonal cycles in pasture growth and extended overgrazing of natural grasslands of low production potential. Silphium perfoliatum L. is a perennial forage species that grows well during the summer period when grasslands have stopped their growth due to moisture stress and high temperatures. Based on the agronomic results and …

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Dry Matter Production And Nutritive Value Of Forage Of Digitaria Eriantha Cv. Irene In Two Locations Of The Central Semi-Arid Region Of Argentina, C A. Frasinelli, H J. Petruzzi, J H. Veneciano, C M. Ferri, V V. Jouve, N P. Stritzler, O A. Terenti Jun 2024

Dry Matter Production And Nutritive Value Of Forage Of Digitaria Eriantha Cv. Irene In Two Locations Of The Central Semi-Arid Region Of Argentina, C A. Frasinelli, H J. Petruzzi, J H. Veneciano, C M. Ferri, V V. Jouve, N P. Stritzler, O A. Terenti

IGC Proceedings (1977-2023)

The aim of this experiment was to compare dry matter (DM) production rates and nutritive value of a warm-season grass, Digitaria eriantha cv. Irene, in two locations of Central Argentina, Santa Rosa (SR) and Villa Mercedes (VM). The plants were established in two identical groups of plots, within a randomized block design. DM rates were calculated from serial, out of phase clippings, and in vitro dry matter digestibility (IVDMD) and crude protein (CP) content analyzed on subsamples. The study lasted for three consecutive growing seasons. Results showed that DM production rates were generally higher (P<0.05) in SR than in VM, but IVDMD and CP content showed no clear trends between both locations. DM production tended to lower from year 1 to 3, related to processes of N depletion from soils (VM) and diminishing rainfall (SR). It is concluded that D.eriantha is a very promising warm-season grass to Central Argentina. Data of nutritive value obtained in one location can be used in others, but results of DM production rates should be taken under the conditions where they will be used.

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