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Full-Text Articles in Plant Sciences
Use Of Brassica Forage Crops To Extend The Grazing Season In The North-East Usa, G A. Jung, H W. Harpster, M G. Lambert, K T. Leath, R A. Byers
Use Of Brassica Forage Crops To Extend The Grazing Season In The North-East Usa, G A. Jung, H W. Harpster, M G. Lambert, K T. Leath, R A. Byers
IGC Proceedings (1993-2023)
Forage turnip (Brassica rapa L,) can be made available for animal utilisation in late summer or In late autumn-early winter, when coolseason grass pastures have a low animal carrying capacity. field trials were conducted to identify and quantify factors that influence turnip yield in December or January and to determine whether these factors affect turnip cultivars similarly. Different levels of production in late autumn-winter were attributed to summer drought, foliar diseases, freezing temperatures and rate of leaf senescence. In all instances, the effects of these factors varied with turnip cultivar. However, cultivar ranking generally was the same whether mean …
Improving Pasture Digestibility: Low Lignin Forages, C Lynne Mcintyre, Sharon L. Abrahams, Heather M. Bettenay, Ruth A. Sandeman, Christine Hayes, Donovan Sharp, Adrian Elliot, John M. Manners, John M. Watson
Improving Pasture Digestibility: Low Lignin Forages, C Lynne Mcintyre, Sharon L. Abrahams, Heather M. Bettenay, Ruth A. Sandeman, Christine Hayes, Donovan Sharp, Adrian Elliot, John M. Manners, John M. Watson
IGC Proceedings (1993-2023)
High lignin content in forages reduces dry matter digestibility and voluntary feed intake by ruminants. Ribozyme and antisense RNA technologies are being investigated as methods of reducing lignin levels and increasing digestibility in temperate and tropical forages. Pirstly, potential target genes in the lignin biosynthetic pathway, against which ribozyme and antisense contructs may be targeted, are being isolated from the temperate and tropical legumes, lucerne and Sty/osa11thes lmmilis, respectively. Secondly, promoter sequences that may direct expression of ribozyme and antisense contructs to specific cells and tissues are being isolated, Thirdly, various ribozyme design and delivery systems are being investigated in …
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
IGC Proceedings (1993-2023)
Senescent grass pasture has low feeding value end is the major limitation to animal productivity during summer in annual environments. The loss of fructan from the stems of temperate grasses as they senesce contributes significantly to the decline in feeding value of the grass, Temporary retention of fructan during senescence achieved by treating grass with a herbicide increases both the feeding value of the grass and the productivity of animals grazing the modified pasture. We have identified an enzyme responsible for initiating the loss of fructan from stems of Lolium rigidum. It has been purified, characterized and will be used …
Genetic Engineering Of Pasture Legume And Grasses For Reduced Lignin Content And Increased Digestibility, C Lynne Mcintyre, J M. Manners, J R. Wilson, H Way, D Sharp
Genetic Engineering Of Pasture Legume And Grasses For Reduced Lignin Content And Increased Digestibility, C Lynne Mcintyre, J M. Manners, J R. Wilson, H Way, D Sharp
IGC Proceedings (1993-2023)
Plants of tropical pastures have a higher lignin content than those of temperate pastures, which limits the digestibility and nutritive value of these forages. Ribozyme and antisense RNA technology is being investigated as a method of reducing lignin levels and increasing digestibility in the tropical forage Stylosanthes spp, and in the model system tobacco. Ribozymes to the tobacco anionic peroxidase mRNA have been designed and shown to be capable of cleaving this mRNA in vitro. Constructs for the expression of antisense and ribozyme RNA to reduce peroxidase gene expression have been prepared, Transgenic tobacco plants containing these constructs have been …
Utilization Of Tall Fescue In Pure Stand, In Association With White Clover And In Complex Mixtures, S Badoux
Utilization Of Tall Fescue In Pure Stand, In Association With White Clover And In Complex Mixtures, S Badoux
IGC Proceedings (1993-2023)
Tall fescue (Festuca arundinacea Schreb.) was cultivated in pure stand, in association with white clover (Trifolium repens L.) and in various complex grass-legume mixtures. Forage yield and quality were always higher in associations with white clover than in tall fescue pure stands. However, under dry conditions, the balance between the two components was difficult to maintain. In more complex mixtures cocksfoot and tall fescue tended to become dominant and to produce a forage of lower quality. In mixtures of long duration, we replaced meadow fescue by tall fescue. Total yield over 3 years was improved; the digestibility of …
Initial Growth And Herbage Quality Trends For Leaves And Stems Of Two Forage Sorghums, A G. Matches, T P. Karnezos, J W. Keeling
Initial Growth And Herbage Quality Trends For Leaves And Stems Of Two Forage Sorghums, A G. Matches, T P. Karnezos, J W. Keeling
IGC Proceedings (1993-2023)
Forage sorghums (Sorghum bicolor (L.) Moench) are commonly grown on the southern Great Plains of the USA as pasture, hay or emergency feed. Grazing and harvesting schedules generally span a wide range of plant maturities, Therefore, we measured at weekly intervals (from 32 to 96 days after planting) the herbage yield and quality of leaves and stems for Trudan 8 (hybrid sudangrass) and Funk-G 1990 (FG- 1990) (hybrid forage sorghum), Replicated plantings were grown under irrigation at Lubbock, Texas in 1990 and 1991. Trudan 8 generally had a lower propo1tion of leaves, leaf yield/plant, digestibility and crude protein levels …
Alfalfa Energetic Value Improvement For Dairy Cows, M Ghesquiere, Jean Claude Emile, G Genier, P Guy
Alfalfa Energetic Value Improvement For Dairy Cows, M Ghesquiere, Jean Claude Emile, G Genier, P Guy
IGC Proceedings (1993-2023)
An experimental alfalfa (Medicago saliva L.) population whose in vitro and in vivo digestibilities are significantly higher than controls was offered to dairy cows in order to investigate its efficiency for· feeding high yielding dairy cattle. Three trials were conducted on first or second cut. Alfalfa was given ad lib. and as fresh forage. The improved digestibility was confirmed. The experimental type was ingested more by cows despite a lower dry matter content and allowed higher milk production. This result shows a real genetic variability for energetic value in alfalfa.
Improved Feeding Vlue In Senescing Grass Pasture After Application Of Glyphosate, R J. Simpson, K L. Gatford, C Siever-Kelly, B J. Leury, H Dove
Improved Feeding Vlue In Senescing Grass Pasture After Application Of Glyphosate, R J. Simpson, K L. Gatford, C Siever-Kelly, B J. Leury, H Dove
IGC Proceedings (1993-2023)
Annual grass pasture sprayed with glyphosate (180 g a.i./ha) at heading retained higher concentrations of water-soluble carbohydrates anci nitrogen than control pasture during senescence. Consequently, the. i11, vitro digestibility of the sprayed pasture was also higher than that of the control pasture. Merino wethers (18 months old) grazing the sprayed pasture consumed more senescent herbage and gained weight ( 40 g/ head/day) until 60 days after anthesis, whereas those grazing control pastures only maintained their Jive weight. However, in both treatments pasture feeding value declined with time and as a consequence improved aniinal performance was not maintained indefinitely.
Comparison Of Digestibility Of Sorghum Silage By Sheep And By Heifers With Special Reference To The Hemicellulose Monosaccharides, Osamu Kawamura, Shigeyuki Tanaka, Takashi Miaki, Kazuo Shinkai
Comparison Of Digestibility Of Sorghum Silage By Sheep And By Heifers With Special Reference To The Hemicellulose Monosaccharides, Osamu Kawamura, Shigeyuki Tanaka, Takashi Miaki, Kazuo Shinkai
IGC Proceedings (1993-2023)
Sorghum (Sorghum bicolor Moench) and corn are the most popular summer forages in south-west Japan. In this experiment, the digestibilities of sorghum silage were determined by adult sheep and by heifers. The digestibilities of all proximate components by heifers were higher than by sheep, Non-structural carbohydrates were almost completely digested by sheep, in contrast to heifers which excreted a portion of the grain undigested. Neutral detergent fibre, acid detergent fibre, hemicellulose, cellulose and lignin digestibilities for heifers were higher than those for sheep. Heifers digested each hemicellulose monosaccharide better than sheep, Sheep and heifers differed by the largest extent …
Chemical And Physical Changes Associated With Maturity Of Barley, Pearl Millet And Berseem Clover, Z Naseer, J P. Fontenot, R L. Grayson, V G. Allen, S M. Chaudhry
Chemical And Physical Changes Associated With Maturity Of Barley, Pearl Millet And Berseem Clover, Z Naseer, J P. Fontenot, R L. Grayson, V G. Allen, S M. Chaudhry
IGC Proceedings (1993-2023)
Experiments were conducted with barley (Hordeum vulgare) and millet (Pennisetum americanum), collected at vegetative, boot, heading and mature growth stages, and berseem clover (Trifollum alexandrium) collected al vegetative, bud and late bloom stages, In the grasses, stems and leaf sheaths were higher (P<0.05) in cell wall constituents, xylose, p-coumaric acid, and ferulic acid and lower (P<0.05) In in vitro dry matter digestibility (IVDMD) than leaf blades. In the legume, stems were higher (P<0,05) in cell wall constituents and xylose than petioles and leaflets, Al advanced maturity, scanning electron microscopy (SEM) showed increased lignification and decreased tissue digestion for leaf sheaths and stems of grasses, compared with leaf blades. In berseem,petioles were higher in IVDMD than leaflets and stems.
Influence Of Maturity On Quality And Agronomic Characteristics Of Energycane, P Mislevy, M B. Adjei, F G. Martin, G M. Prine
Influence Of Maturity On Quality And Agronomic Characteristics Of Energycane, P Mislevy, M B. Adjei, F G. Martin, G M. Prine
IGC Proceedings (1993-2023)
As fossil fuel supplies decline and become cost prohibitive, biomass must be exploited as a renewable energy source, Energy yield from biomass tends to vary among species and different parts of the same plant, The purpose of this research was to determine change in percentage dry matter (DM), DM yield and quality (crude protein (CP), in vitro organic matter digestion (IVOMD)) of green leaves (GL), dead leaves (DL) and stems (S) of L79-1002 energycane (Saccharum spp. L.) harvested at 0.6 m increments from 0.6 to 4,2 m. As plant height at harvest increased from 0.6 to 4.2 m, GL quantity …
Seasonal Changes In Vitro Digestibility Of Leaf And Pseudostem And Its Implications For Diet Digestibility Of Perennial Ryegrass Continuously Stocked With Sheep, H Clark
IGC Proceedings (1993-2023)
The dry matter digestibility (DMD%) of 3 categories of leaf (youngest expanding leaf, youngest fully expanded leaf, older leaves) and the pseudostem in 3 late heading diploid perennial ryegrass (Lolium perenne L.) cultivars (S23, Melle and Mascot) was estimated on 6 occasions during a single 6-month. grazing season. The cultivars were continuously stocked to maintain a sward height of 4 cm. Information on the DMD% of the plant parts was combined with details of the proportions of leaf and pseudostem consumed by the sheep to obtain an estimate of diet digestibility. Differences between cultivars in the DMD% of plant …
Alfalfa Stem Architecture Effects On Forage Quality, K D. Kephart, A Boe, R Bortnem
Alfalfa Stem Architecture Effects On Forage Quality, K D. Kephart, A Boe, R Bortnem
IGC Proceedings (1993-2023)
Forage quality in alfalfa (Medicago sativa L.) may be improved by selection for increased branching to dilute stem bases with less lignified branch tissue. This research was done to determine the effects of selection for branching on growth and forage quality of alfalfa stems. Divergent selection for the mass ratio of aidllary. to main stems (AMR) was done within 2 alfalfa cultivars and tested at 2 locations. High-AMR genotypes had about 16% greater AMR than low-AMR genotypes. Although differences in AMR existed, i11 vitro digestible dry matter (IVDDM) concentration of total stems and stem branches did not differ between …
Improving The Digestibility Of Warm-Season Perennial Grasses, K J. Moore, K P. Vogel, A A. Hopkins, J F. Pedersen, L E. Moser
Improving The Digestibility Of Warm-Season Perennial Grasses, K J. Moore, K P. Vogel, A A. Hopkins, J F. Pedersen, L E. Moser
IGC Proceedings (1993-2023)
The nutritional value of perennial warm-season grasses is limited primarily by digestible energy concentration. The relatively low digestibility of these grasses is due to their high concentration of fibre and its resistance to degradation in the rumen. The objective of this study was to evaluate quantitatively improvements in the digestibility of 5 experimental switchgrass (Panicum virgatum L.) populations in terms of a first-order digestion model in order to develop selection strategies for further improvement. The populations were developed by recurrent restricted phenotypic selection from a base population by l cycle of selection for low and 3 cycles for high …
Comparison Of Yield, Forage Quality And Persistence Of 11 Grasses Grown With Irrigation In A Semi-Arid Climate, D E. Glover, G A. Kielly, R H. Cohen, P G. Jefferson
Comparison Of Yield, Forage Quality And Persistence Of 11 Grasses Grown With Irrigation In A Semi-Arid Climate, D E. Glover, G A. Kielly, R H. Cohen, P G. Jefferson
IGC Proceedings (1993-2023)
Nutritive quality of many grass species used for forage in the Northern Great Plains of Canada and the United States is not well documented, especially at different maturity stages. This study compared agronomic and forage quality characteristics of eleven grasses common to Saskatchewan. Botanical separation and quality analysis was undertaken at three growth stages. Meadow Brome (Bromus riparius), Russian Wildrye (Psathyrostachys juceus) and Altai Wildrye (Elymus angustus) were shown to have high leaf to stem ratios which corresponded with high protein levels. Separations showed persistence of Reed Canarygrass (Phalaris arudinaceus), Creeping Foxtail …
The Effect Of Glyphosate On Dm Yield And Quality Of Forage Sorghum, T Kipnis, Sofia Kaller, G Krivat, Levana Dvash, D Ben-Ghedalia
The Effect Of Glyphosate On Dm Yield And Quality Of Forage Sorghum, T Kipnis, Sofia Kaller, G Krivat, Levana Dvash, D Ben-Ghedalia
IGC Proceedings (1993-2023)
The possibility of improving the forage quality of sorghum (Sorghum bicolor L. Moench) by using herbicide was assessed in field trials. Glyphosate (Roundup) reduced cell wall content and increased the digestibility of the dry matter. When sprayed towards the end of vegetative growth, quality improvement could be achieved without reduction in yield. Glyphosate may enhance accumulation of sugars, however, the possibility that the herbicide improves forage quality by affecting cell wall structure and digestibility cannot be ruled out.
Anatomic And Chemical Traits, And In Vitro Digestibility Of Three Tropical Grasses, S Queiroz, Jose Alberto Gomide, Jose Maria
Anatomic And Chemical Traits, And In Vitro Digestibility Of Three Tropical Grasses, S Queiroz, Jose Alberto Gomide, Jose Maria
IGC Proceedings (1993-2023)
Single linear correlation was established between in vitro dry matter digestibility (IVDMD) and contents of chemical entities as well as proportion of different tissues. Top and bottom leaves were sampled from Jaraguagrass, setariagrass and dwarf elephantgrass. Among the chemical entities, lignin showed better correlation with IVDMD. The proportion of sclerenchyma in the samples of stem and leaf lamina from the top layer and the parenchymall cells in the leaf sheath showed highly significant correlations with the IVDMS NDF content correlated positively with percentage of sclerenchyma, lignified vascular tissues and parenchyma bundle sheath, but negatively with percentage mesophyll and epidermis tissues. …
Anatomy Of Forage Plant Parts In Relation To Digestion, P Rezvani Moghaddam, D Wilman
Anatomy Of Forage Plant Parts In Relation To Digestion, P Rezvani Moghaddam, D Wilman
IGC Proceedings (1993-2023)
The objective of this study was to contribute some quantitative information regarding the proportion of cell types and the thickness of cell walls in different plant parts of three major forage species, lucerne (Medicago sativa L.), tall fescue (Festuca arundinacea Schreb.) and maize (Zea mays L.). All plant parts examined contained a significant proportion of cell types with walls which appeared too thick to be completely degraded during the time which plant particles are likely to spend in the rumen; this applied particularly to lucerne stems and maize leaf blades.
Analysis Of Mixed Sward Silage By Near Infrared Reflectance Spectroscopy (Nirs), P Castro, J Castro, A Gonzalez-Arraez, G Flores
Analysis Of Mixed Sward Silage By Near Infrared Reflectance Spectroscopy (Nirs), P Castro, J Castro, A Gonzalez-Arraez, G Flores
IGC Proceedings (1993-2023)
NIR calibration equations were developed to determine crude protein (CP), acid detergent fibre (ADF), organic matter (OM), in vivo organic matter digestibility (OMD) and metabolizable energy (ME) in mixed swards silages. Spectra of 96 in vivo evaluated silages were recorded on a PSCO 6250 monochromator spectrophotometer using NSAS (NIRS Spectral Analysis Software) and converted to NewISI software. NIR calibrations were obtained by modified PLS regression of the 2nd. derivative of SNV and De-trended spectra on laboratory and in vivo data. Determination coefficients (R2) ranged from 0.77 for ME to 0.98 for CP and OM. Highest standard errors of calibration and …
A Dynamic Model For Changes In Nutritional Value In Grass. An Approach To Modify The Model To A Mixed Ley With Grass And Red Clover, A.-M Gustavsson
A Dynamic Model For Changes In Nutritional Value In Grass. An Approach To Modify The Model To A Mixed Ley With Grass And Red Clover, A.-M Gustavsson
IGC Proceedings (1993-2023)
The objective of this approach was to check the possibility to modify a dynamic model for simultaneous simulation of the above-ground dry matter growth (DM) and concentrations of crude protein CP) and metabolizable energy (ME) in stands of timothy (Phleum pratense L.) to a model for mixed leys with timothy and red clover (Trifolium pratense L.). DM growth is estimated in relation to intercepted radiation, air temperature, soil-water status and tissue-N concentration. CP is estimated in relation to plant uptake of N from soil mineralization, nitrogen fixation and applied fertilizer, and dilution of N during plant growth. ME …
Stover Traits As Indicators For Forage Aptitude In Argentine Hybrids Of Maize, L M. Bertoia, M B. Aulicino, R Burak
Stover Traits As Indicators For Forage Aptitude In Argentine Hybrids Of Maize, L M. Bertoia, M B. Aulicino, R Burak
IGC Proceedings (1993-2023)
The use of maize as forage in Argentina has increased in recent years. Nowadays, the seed sold in the country as forage maize belongs to selected grain hybrids. The development of wholly forage materials means a complete change in the architecture of the plant. Our aims were 1) To propose classification criteria of maize genotypes 2) To characterize maize hybrids used as forage on the Argentine market, based on yield and quality forage traits. Numerical techniques allowed the classification of the hybrids. Stover digestibility and stover soluble carbohydrates, indicative of forage quality traits, presented the greatest variability. These results would …
The Energetic Utilization Of Forages In Fresh And Dried Condition By Ruminants, W Jentsch
The Energetic Utilization Of Forages In Fresh And Dried Condition By Ruminants, W Jentsch
IGC Proceedings (1993-2023)
The influence of dehydration of forages on digestibility and energy utilization was measured by indirect calorimetry in respiration chambers with adult wether sheep as a model for ruminants. Comparisons were carried out between fresh and carefully dried forages (experiment 1) and between fresh and not only carefully but also severely dried forages (experiment 2). Careful drying caused no change, but severe drying decreased energy and especially crude protein digestibility. There were no differences in utilization of metabolizable energy between fresh and carefully or severely dried forages.
Corn Silage In Sustainable And Conventional Systems For Finishing Beef Cattle, J P. Fontenot, V G. Allen, L L. Scott, D H. Vaughan, C A. Laub, D B. Taylor
Corn Silage In Sustainable And Conventional Systems For Finishing Beef Cattle, J P. Fontenot, V G. Allen, L L. Scott, D H. Vaughan, C A. Laub, D B. Taylor
IGC Proceedings (1993-2023)
The objective of the research was to compare finishing beef steers on high corn (Zea mays L.) silage diets in which the corn was produced under conventional and sustainable systems. The conventional corn forage was produced on a given area for 5 yr, using conventional practices, alternating with 5 yr of alfalfa (Medicago sativa L.) The sustainable system corn forage was produced in a 4-yr rotation with small grain cover crops and legumes, in which corn was grown in a given area once every 4 yr. Input of pesticides was less for the sustainable system. Steers were fed …
Effect Of The Ammoniation On Brachiaria Decumbens Hays, B Rosa, R A. Reis, K T. Resende, L.R De A. Rodrigues, C C. Jobim
Effect Of The Ammoniation On Brachiaria Decumbens Hays, B Rosa, R A. Reis, K T. Resende, L.R De A. Rodrigues, C C. Jobim
IGC Proceedings (1993-2023)
The effect of the ammoniation on B. decumbens hay obtained during the phase of seed maturation were studied as follows: hay not treated and hay treated with 2 or 3% of NH3, or 3.6 or 5.4% of urea. Ammoniation reduced the contents (g/kg DM) of NDF, hemicellulose, ADF, and lignin and increased the contents of total N, and ADIN; the IVDMD; the IVOMD; the “in situ” degradability of DM and OM and the apparent digestibility (g/kg nutrient) of DM, OM, and CP, as well increased the daily voluntary intake (g/kg0.75) of DM, the digestible DM, OM, the digestible OM, the …
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
IGC Proceedings (1993-2023)
Production of biosolids has been increasing consistently in the last few years. Land application of wastes is being regarded as an alternative means of disposal and as a source of inexpensive fertilizer material. Pastures are particularly attractive in this regard since the areas occupied are extensive and large amounts of fertilizer are required for adequate production. The objective of this study is to investigate the effects of various rates of biosolids on bahiagrass yield and quality. Forage samples were collected from each plot from April to December. Significant increases in dry matter production, crude protein content and in vitro digestibility …
Long-Term Effects Of Co2 Enrichment And Temperate Increase On Forage Quality In A Temperate Grass, J F. Soussana, J M. Besle, I Chabaux, P Loiseau, P C. De Faccio Carvalho
Long-Term Effects Of Co2 Enrichment And Temperate Increase On Forage Quality In A Temperate Grass, J F. Soussana, J M. Besle, I Chabaux, P Loiseau, P C. De Faccio Carvalho
IGC Proceedings (1993-2023)
Perennial ryegrass swards were grown during two years at two N fertilizer supplies in elevated (700 ppm) or ambient atmospheric CO2 concentration at outdoor temperature and at + 3°C in elevated CO2. Elevated CO2 and temperature increase had only minor impacts on the digestibility and on the fiber composition of the cut material. On average, the water soluble carbohydrate concentration of the leaf laminae was doubled in elevated CO2, whereas a 3°C temperature increase reduced this concentration by 25 %.
Nutritive Value Of Guineagrass Cultivars In The Winter As Influenced By Nitrogen Fertilization, N.F G. Rethman, W.A J. Steenekamp
Nutritive Value Of Guineagrass Cultivars In The Winter As Influenced By Nitrogen Fertilization, N.F G. Rethman, W.A J. Steenekamp
IGC Proceedings (1993-2023)
The monitoring of yield, structure and nutritive value of four Panicum maximum (Guineagrass) cultivars, utilized as standing hay in the winter, yielded valuable data on the relative importance of nitrogen fertilization and cultivar. While nitrogen had a strong influence on yield and crude protein content it was the differences between cultivars, with respect to soil adaptation and structure, which played a dominant role. It is recommended that future research place particular emphasis on the adaptation of cultivars and genotype differences in structure.
Nitrogen And Fiber Digestion In Sheep Fed Fresh-Frozen And Field-Dried High And Low Tannin Sericea Lespedeza, T H. Terrill, W R. Windham, C S. Hoveland, H E. Amos, B Kouakou, S Gelaye
Nitrogen And Fiber Digestion In Sheep Fed Fresh-Frozen And Field-Dried High And Low Tannin Sericea Lespedeza, T H. Terrill, W R. Windham, C S. Hoveland, H E. Amos, B Kouakou, S Gelaye
IGC Proceedings (1993-2023)
Field-drying reduces extractable condensed tannin (CT) of sericea lespedeza [Lespedeza cuneata (Dum-Cours) G. Don], but effects on specific bound and unbound forms of CT and the relationship to protein and fiber digestion in ruminants are unclear. Intake and digestibility of fresh-frozen and field-dried high- and low-tannin sericea were investigated in a feeding trial with sheep (Ovis spp.). Field-drying had no effect on crude protein (CP) and fiber content of sericea, but shifted CT from extractable to bound forms. Digestion coefficients for CP, neutral detergent fiber (NDF), and acid detergent fiber (ADF) were lower for high-tannin sericea than the low-tannin …
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 (1993-2023)
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 (1993-2023)
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.