Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 16 of 16
Full-Text Articles in Physical Sciences and Mathematics
Differences In Chemical Composition Among Provenances Of Tree Fodder Species In A Subhumid Environment: Relation To Use As Supplements, B H. Dzowela, L Hove, P L. Mafongoya
Differences In Chemical Composition Among Provenances Of Tree Fodder Species In A Subhumid Environment: Relation To Use As Supplements, B H. Dzowela, L Hove, P L. Mafongoya
IGC Proceedings (1997-2023)
Studies were initiated in a subhumid Southern African environment to assess the chemical composition and nutritive value of Acacia angustissima (Mill.) Kuntze, Calliandra calothyrsus Meiss. and Leucaena species. The objective was to determine variability in crude protein (CP) concentration, acid detergent fibre (ADF), neutral detergent fibre (NDF), and soluble and insoluble proanthocyanidins from fodder samples of species, subspecies and provenances. A wide range was found in these parameters. The implications of these chemical composition factors, especially proanthocyanidins, on the use of these browse fodders in livestock feeding systems are discussed.
Differences In Chemical Composition Among Provenances Of Browse Species In A Subhumid Environment: Relation To Use As Supplements, B H. Dzowela, L Hove, P L. Mafongoya
Differences In Chemical Composition Among Provenances Of Browse Species In A Subhumid Environment: Relation To Use As Supplements, B H. Dzowela, L Hove, P L. Mafongoya
IGC Proceedings (1997-2023)
Studies were initiated in a subhumid Southern African environment to assess the chemical composition and nutritive value of Acacia angustissima (Mill.) Kuntze, Calliandra calothyrsus Meiss. and Leucaena species. The objective was to determine variability in crude protein (CP) concentration, acid detergent fibre (ADF), neutral detergent fibre (NDF), and soluble and insoluble proanthocyanidins from fodder samples of species, subspecies and provenances. A wide range was found in these parameters. The implications of these chemical composition factors, especially proanthocyanidins, on the use of these browse fodders in livestock feeding systems are discussed.
Dry Matter Production And Nutritive Value Of Wild Alfalfa, C N. Shin
Dry Matter Production And Nutritive Value Of Wild Alfalfa, C N. Shin
IGC Proceedings (1997-2023)
Alfalfa grows wild in some parts of Korea, but specific information is lacking as to its agronomic characteristics, nutritive value and dry matter production potential. The objective of this study was to evaluate the usefulness of wild alfalfa (Medicago sativa L) as a forage. Wild alfalfa and Vernal were field sown at Keongsan, Keongbuk in the spring of 1995. Emergence for Vernal was better than for wild alfalfa. It was observed that the flowering date of the wild alfalfa was delayed by 8 days. Regrowth of Vernal was better than that of the wild alfalfa at each harvesting. After …
Evaluation Of Oat Genotypes For Forage And Seed Production In The Northeast Region Of Sao Paulo State-Brazil, R A. Reis, L R. De A. Rodrigues, T De J D. Rodrigues
Evaluation Of Oat Genotypes For Forage And Seed Production In The Northeast Region Of Sao Paulo State-Brazil, R A. Reis, L R. De A. Rodrigues, T De J D. Rodrigues
IGC Proceedings (1997-2023)
The DM production (DMP), chemical composition, and seed production of black oats (Avena strigosa Schreb.) and the yellow oat cultivars ‘UPF2’ , ‘UPF3’ and ‘UPF7’ (A. byzantina C. Kock.) were evaluated under two management systems: plants cut (60 days after sowing-DAS) and uncut for seed production. Oat genotypes were sown in 1993 and 1994. UPF7 was the least productive. No difference was detected (P > 0.05) in the cell wall composition of the genotypes. High values of CP (22.9%) and IVDMD (77.6%) were determined across all genotypes. In 1994, cutting at 60 DAS affected the seed production of the cultivars. …
Physiological And Chemical Characteristics Of Five Cultivars Of Cynodon, C C.C. Gomide, L.R. De A. Rodrigues, T.De J.D. Rodrigues, R A. Reis, D A. Banzatto
Physiological And Chemical Characteristics Of Five Cultivars Of Cynodon, C C.C. Gomide, L.R. De A. Rodrigues, T.De J.D. Rodrigues, R A. Reis, D A. Banzatto
IGC Proceedings (1997-2023)
The experiment was carried out at UNESP, Brazil, to evaluate five Cynodon cultivars: (Cynodon nlemfuensis Vanderyst cv “Tifton 68”, Cynodon spp. cv “Tifton 85”, Cynodon dactylon cv “Florakirk”, Cynodon nlemfuensis Vanderyst var. nlemfuensis cv “Florico” e Cynodon nlemfuensis Vanderyst var. nlemfuensis cv “Florona”). Plants were sampled once a week from 14 to 84 days of growth to study physiological characteristics and at 14-day intervals to study chemical characteristics. The following variables were studied: DM production, leaf/stem ratio, leaf weight/total dry matter ratio, relative growth rate, chlorophyll contents, leaf area, specific leaf area, LAI, and the contents of CP, NDF, …
In Vitro Digestibility And Methane Production Of Two Tropical Grasses: Plant Spacing And Grazing Frequency, F. E. Enwete, P. A. Dele, O. L. Aiyesa, O. I. Awoola, C. C. Anotaenwere, J. I. Akinyode, T. A. Amole, Olufemi S. Onifade
In Vitro Digestibility And Methane Production Of Two Tropical Grasses: Plant Spacing And Grazing Frequency, F. E. Enwete, P. A. Dele, O. L. Aiyesa, O. I. Awoola, C. C. Anotaenwere, J. I. Akinyode, T. A. Amole, Olufemi S. Onifade
IGC Proceedings (1997-2023)
This study was carried out to investigate the influence of plant spacing and grazing frequency on the in vitro gas production, digestibility, and methane production of Guinea grass (Megathyrsus maximus) and Elephant grass (Cenchrus purpureus) in the humid southwest part of Nigeria. The experiment was laid in a 2 x 2 x 2 factorial arrangement in a split-split-plot design with three replicates, which consisted of two grazing frequency (3 and 6-week) as the main plot, two grass species: Guinea grass (M. maximus) and Elephant grass (C. purpureus) as the sub plot and …
Chemical Composition And Microbial Diversity Of The Silage Of Forage Peanut Harvested At Two Regrowth Ages And Treated With Microbial Inoculants, A. J. S. Macêdo, O. G. Pereira, V. P. Da Silva, A. J. Dos Anjos, W. Alves, H. R. O. Santos, K. G. Ribeiro
Chemical Composition And Microbial Diversity Of The Silage Of Forage Peanut Harvested At Two Regrowth Ages And Treated With Microbial Inoculants, A. J. S. Macêdo, O. G. Pereira, V. P. Da Silva, A. J. Dos Anjos, W. Alves, H. R. O. Santos, K. G. Ribeiro
IGC Proceedings (1997-2023)
The objective of this study was to evaluate the chemical composition and microbial diversity of the silage of forage peanut harvested at 40 and 80 days of regrowth and treated with microbial inoculants. The inoculants evaluated were commercial inoculant (CI) Sil-All 4×4 (Lallemand®, Brazil); the AV14.17, Lactiplantibacillus pentosus strain (ISO) isolated from alfalfa silage; and control (CTRL), without inoculant. A total of 500 g of forage was ensiled in nylon-polyethylene bags (25.40 × 35.56 cm). After 60 days of fermentation, the bags were opened and silages were analyzed for dry matter (DM), mineral matter (MM), organic matter (OM), crude protein …
Responses Of Irrigated Pasture Nutritive Characteristics To Summer Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
Responses Of Irrigated Pasture Nutritive Characteristics To Summer Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
IGC Proceedings (1997-2023)
Low summer rainfall in southwest Victoria, Australia, restricts pasture growth and reduces pasture nutritive value thereby limiting potential milk production. One fifth of dairy farmers in the region have some capacity to irrigate during summer and nitrogen (N) fertiliser is used to enhance pasture dry matter (DM) yield. Data on the effects of N fertiliser on irrigated pasture nutritive characteristics during summer in southwest Victoria are lacking. Two experiments determined the potential of N fertiliser to improve pasture nutritive (crude protein, CP and metabolisable energy, ME) value during summer.
A Decision Support System For Monitoring Livestock Diet Quality And Performance: Verification Study On Cattle, Adami Tulu, Ethiopia, A. A. Jama, G. Tolleson, J. W. Stuth, Abule Ebro, K. Zander, Robert J. Kaitho
A Decision Support System For Monitoring Livestock Diet Quality And Performance: Verification Study On Cattle, Adami Tulu, Ethiopia, A. A. Jama, G. Tolleson, J. W. Stuth, Abule Ebro, K. Zander, Robert J. Kaitho
IGC Proceedings (1997-2023)
Fecal profiling technology based on near infrared spectroscopy (NIRS) has been widely used in the U.S. to predict the diet quality and performance of free-ranging animals (e.g. Leite & Stuth 1995, Lyons & Stuth 1992, Lyons et al., 1993, Stuth et al., 1999, Tolleson et al., 2001). This technology is linked with the Nutritional Balance Analyzer (NUTBAL-PRO) model to form the core of a nutritional advisory system for livestock producers in the United States. This model predicts changes in body weight and condition for a broad range of livestock classes for cattle, sheep and goats. To test …
Effect Of Dairy Effluent On Turnip Nutritive Characteristics, Joe L. Jacobs, G. N. Ward, Frank R. Mckenzie
Effect Of Dairy Effluent On Turnip Nutritive Characteristics, Joe L. Jacobs, G. N. Ward, Frank R. Mckenzie
IGC Proceedings (1997-2023)
In southern Victoria, high summer temperatures and low rainfall lead to low pasture growth and a decline in nutritional value until rainfall commences in autumn. Annual forage crops such as turnips often are used to fill the summer feed gap. Jacobs & Ward (2003) observed that dairy effluent applied at low rates could improve turnip DM yields and crude protein content. Results from the first two years of a 3-year study comparing a range of effluent application rates on turnip leaf and root nutritive characteristics are reported.
Changes In Grass Quality Of Coastal Meadows In Estonia, Tiina Köster, Karin Kauer, R. Viiralt, A. Selge
Changes In Grass Quality Of Coastal Meadows In Estonia, Tiina Köster, Karin Kauer, R. Viiralt, A. Selge
IGC Proceedings (1997-2023)
In Estonia the reason for reduction in coastal meadows and expansion of the stands of the common reed (Phragmites australis) is the discontinuation of traditional use of grasslands which were previously grazed and cut. Phragmites australis usually produces dense and monospecific stands at the waterline, where species richness is low. It can survive in ungrazed shore meadows, but it suffers from grazing (Tyler, 1969). The investigated Phragmitetum australis association had been influenced by grazing activities, but it remained rather sparse and due to that had relatively low productivity, reaching 3.11 t DM/ha. Traditionally coastal meadows have been used …
Nutritional Characteristics Of Four Species Of Native Pastures From The Highlands Of Central Mexico, O. A. Castelán, A. A. Rayas, A. Espinoza, J. Estrada, C. Arriaga, F. Mould
Nutritional Characteristics Of Four Species Of Native Pastures From The Highlands Of Central Mexico, O. A. Castelán, A. A. Rayas, A. Espinoza, J. Estrada, C. Arriaga, F. Mould
IGC Proceedings (1997-2023)
Research in Mexico has been devoted to nutritional characterisation of improved pastures, but native species of grasses have not been studied. The aim of this experiment was to evaluate the nutritional value of four species of native pastures and composite samples of them.
Variation In The Quality Of Forage Of Six Rangeland Species In Different Phenological Stages, Zeid Ahmadi, H. Arzani, Hossein Azarnivand
Variation In The Quality Of Forage Of Six Rangeland Species In Different Phenological Stages, Zeid Ahmadi, H. Arzani, Hossein Azarnivand
IGC Proceedings (1997-2023)
An understanding of forage quality is fundamental to the measurement of grazing capacity. In addition, knowledge of forage quality is necessary for planning grazing and developing range improvement and development programmes, such as planting and seeding of rangelands. Among the different factors that affect forage quality, phenological stage is particularly important (Cook, 1972; Caballero et al.,2001). The objective of this study was to investigate the effects of plant species, phenological stages and life form on forage quality indices.
Nutritive Quality Of Silages By Conventional Laboratory Methods And Near Infrared Reflectance Spectroscopy, Pilar Castro, G. Flores, A. González-Arráez, J. Castro, B. Fernández-Lorenzo
Nutritive Quality Of Silages By Conventional Laboratory Methods And Near Infrared Reflectance Spectroscopy, Pilar Castro, G. Flores, A. González-Arráez, J. Castro, B. Fernández-Lorenzo
IGC Proceedings (1997-2023)
Preservation of forages as silages is needed by dairy farmers in NW Spain to feed their cows during the dry (summer) and cold (winter) seasons. The objective of this work was to compare the prediction of in vivo digestibility values by conventional laboratory methods and by near infra-red reflectance spectroscopy (NIRS) for herbage and maize silages.
The Seasonal Nutritional Value Of Kikuyu Oversown With Ryegrass And Clover, Robin Meeske, Philip R. Botha, Hennie A. Snyman
The Seasonal Nutritional Value Of Kikuyu Oversown With Ryegrass And Clover, Robin Meeske, Philip R. Botha, Hennie A. Snyman
IGC Proceedings (1997-2023)
To overcome the seasonality and relatively low forage quality of kikuyu (Pennisetum clandestinum), annual ryegrass (Lolium multiflorum spp.), perennial white (Trifolium repens) and red clover (Trifolium pratense) can be incorporated into an existing kikuyu stand to improve pasture quality and spring production. The aim of this study was to determine the quality of kikuyu (K), kikuyu oversown with annual ryegrass (KR), kikuyu oversown with a mixture of perennial ryegrass (Lolium perenne) and perennial white and red clover (KRC) and kikuyu oversown with a mixture of white and red clover (KC), in …
Agronomic Characteristics Of Novi Sad Winter Vetch Cultivars, V. Mihailović, A. Mikić, B. Ćupina, S. Vasiljević, D. Milić
Agronomic Characteristics Of Novi Sad Winter Vetch Cultivars, V. Mihailović, A. Mikić, B. Ćupina, S. Vasiljević, D. Milić
IGC Proceedings (1997-2023)
Genus Vicia. contains important annual food and forage species such as field bean, V. faba., narbon vetch, V. narbonensis, and common vetch, V. sativa (Maxted, 1995), while Hungarian V. pannonica Crantz and hairy vetch V. villosa also play an important role in the Balkans. Winter vetches are excellent forage catch crops useful for sustainable agriculture and organic farming (Ċupina et al., 2004). Our study was aimed at determining the agronomic characteristics of the winter vetch cultivars developed in Novi Sad, assessing thus their ability for successful growing in the prevailing conditions of Serbia and Montenegro.