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Articles 181 - 210 of 3654
Full-Text Articles in Entire DC Network
Comparison Of Meat Performance Of Lambs Kept On Pastures And Intensively Fed On Pastures As Well As In Fattening Units, S Kukovics, T Schuszter, Cs Lanyi
Comparison Of Meat Performance Of Lambs Kept On Pastures And Intensively Fed On Pastures As Well As In Fattening Units, S Kukovics, T Schuszter, Cs Lanyi
IGC Proceedings (1977-2023)
Hungary is an exporting country in lambs which go for export either live or slaughtered. The majority of lambs are intensively fattened before slaughter or before live export. In the fattening pens (group fatting), a mixture of pelleted feed is offered ad libitum, but, in many cases, hay and/or straw are also fed. This feeding technology involves significant costs ; therefore, the testing of various fattening methods have been aimed at. Besides, we wished to study the fattening performance of imported Corriedale and Romney sheep, by using New-Zealand as well as Hungarian methods.
Comportement Alimentaire De Cerfs Rusa En Croissance Recevant Une Tation A Base De Graminee (Brachiaria Mutica), P Grimaud, P Chardonnet
Comportement Alimentaire De Cerfs Rusa En Croissance Recevant Une Tation A Base De Graminee (Brachiaria Mutica), P Grimaud, P Chardonnet
IGC Proceedings (1977-2023)
L'elevage commercial du cerf rusa en Nouvelle-Caledonie a commence en 1987. Les connaissances zootechniques sur cette espece sont encore sommaires a ce jour et !'experience menee vise a etudier Jes preferences alimentaires, la consommation et la croissance de cerfs recevant a volonte trois aliments de valeur nutritive moyenne a bonne.
Study Of A Strategy To Intensify Sheep Production Systems With Merino Ewes Grazing Mediterranean Natural Pastures, B H. Manterola, A L. Sirhan, A Dina Cerda
Study Of A Strategy To Intensify Sheep Production Systems With Merino Ewes Grazing Mediterranean Natural Pastures, B H. Manterola, A L. Sirhan, A Dina Cerda
IGC Proceedings (1977-2023)
In chilean arid and semiarid mediterranean ranges with a rainfall of 250 to 600 mm mainly during fall and winter and with a drought period of six to seven months per year natural pasture develops being the main forage source for sheep production. Productivity level is based on a 70-75 lambing percentage and 0.8-0.9 lambs/ewe/year, equivalent to 25-30 kg/ha/yr (at a stocking rate of 1 ewe/ha/yr). The first objective of this research was to quantify the reproductive and productive potential of Precocius Merino ewes, under intensive system with mating every eight months. The second objective was to study the performance …
Forward Rotational Grazing On Digitaria Decumbens Pasture With Weaned Female Creole Goats In Guadeloupe, G Alexandre, H Baudot, P Cruz, S Prache
Forward Rotational Grazing On Digitaria Decumbens Pasture With Weaned Female Creole Goats In Guadeloupe, G Alexandre, H Baudot, P Cruz, S Prache
IGC Proceedings (1977-2023)
Tropical herbage production regulation, obtained through fertilisation and irrigation, doesn't solve the problem of the low nutritive value and the low level of voluntary intake of this herbage. These problems are particulary important with young growing animals regarding to their low ingestive capacity and their high growth requirements. Different pasture management systems have been tested in Guadeloupe (French West Indies) in order to propose a better utilization of tropical pastures.
The Performance Of Sucking Lambs Grazing Unfertilized An Fertilized Natural Pasture And Rangeland Under Subarctic Conditions, Olafur Gudmundsson
The Performance Of Sucking Lambs Grazing Unfertilized An Fertilized Natural Pasture And Rangeland Under Subarctic Conditions, Olafur Gudmundsson
IGC Proceedings (1977-2023)
Under subartic conditions natural pastures and rangelands are not very productive and are often vulnerable to erosion when overgrazed. The grazing season is also very short, often only four to five months, during which time the lambs have to reach slaughter weight. It is therefore critical to increase carrying capacity and production of the land. Several studies have tested fertilizer use to increase plant production under these condition (e.g., Thorsteinsson and Sigurbjornsson, 1961 ; Arnalds 1974; Arnalds et al. 1980). However, while these studies have shown a manifold increase in forage production and a shift in plant composition to a …
Studies In Production Of Weaned Merino Lambs In Relation To Pasture Species During Their First Summer In Southern Australia, H Lloyd Davies
Studies In Production Of Weaned Merino Lambs In Relation To Pasture Species During Their First Summer In Southern Australia, H Lloyd Davies
IGC Proceedings (1977-2023)
A typical Mediterranean environment imposes problems in ensuring adequate nutrition of weaned lambs during their first summer (Allden 1959). All pasture species will have matured and set seed and generally are of low nutritive value. One solution to this problem is to graze pasture species grown under irrigation. The work reported here is on several investigations into the response of sheep in liveweight and wool production to some pure stands of grasses and legumes.
The Effects Of Graminaceous Species And Stocking Rate On Grazing Performance Of Charolais Steers, Francoise Riviere, Odile Colin
The Effects Of Graminaceous Species And Stocking Rate On Grazing Performance Of Charolais Steers, Francoise Riviere, Odile Colin
IGC Proceedings (1977-2023)
High daily intakes of herbage with high digestibility are required to maximise animal production output per hectare from grazing. Tall fescue (TF) is well known for its high herbage production but its nutritive value may limit animal growth (Jacobson, 1969). Recently progress in sward species selection has provided· new TF cultivars with smooth leaves more digestible and better ingested by animals than the previous cultivars. The purpose of the trials reported here was to study, in comparison with perennial rye grass (PRG), the influence of new tall fescue cultivars, on steers growth grazing at two stocking rates.
Evaluation Of Three Tropical Perennial Grasses For Beef Production In South Central Florida, A Larbi, P Mislevy, W F. Brown, M B. Adjei
Evaluation Of Three Tropical Perennial Grasses For Beef Production In South Central Florida, A Larbi, P Mislevy, W F. Brown, M B. Adjei
IGC Proceedings (1977-2023)
Species of the genus Cynodon (Bermudagrasses and stargrasses) have a considerable potential for grazing in southern Florida (Adjei et al., 1980, Pitman et al., 1984). Preliminary evaluation studies indicate that two new stargrass cultivars, Florico and Florona ( Cynodon nlemfuensis Vanderyst var nlemfuensis) and Callie Hybrid Bermudagrass [C. dactylon (L.) Pers Tifton 44 X Callie], may offer alternatives to commercially available cultivars, due to their high forage production, persistence, cold tolerance and better nutritive value (Mislevy et al., 1981 and Brown, 1986). Little is known, however, of animal performance on these grasses under grazing. The objective of the study was …
Effects Of Grazing Sainfoin Stubble Fields And Adding With Green Hay On Grass-Lamb Fattening, Fu Yikun, Jia Dujing, Li Guangdi, Dang Bo, Wen Shangwen, Xu Changlin
Effects Of Grazing Sainfoin Stubble Fields And Adding With Green Hay On Grass-Lamb Fattening, Fu Yikun, Jia Dujing, Li Guangdi, Dang Bo, Wen Shangwen, Xu Changlin
IGC Proceedings (1977-2023)
With its fast turnover, low cost and high nutrition, lamb production has been developing an important industry of seasonal animal husbandry recently in China. The way of taking lambs from pastoral area and then fattened in farming area is considered to be most effective for lambs can make good use of feeds and climate resources in both farming and pastoral areas. The effects of grazing sainfoin ( Onobrychis viciifolia) stubble fields and adding with green hay on two types of lamb fattening were studied by means of measuring live-weight gains, meat quality and carcass output during 1986-1987, and the …
Efficiency Of Grazing On Growth And Nutrient Intake Of Dairy Heifers, M Okamoto, I Iketaki, N Hasegawa, N Yoshida
Efficiency Of Grazing On Growth And Nutrient Intake Of Dairy Heifers, M Okamoto, I Iketaki, N Hasegawa, N Yoshida
IGC Proceedings (1977-2023)
Grazing has traditionally been recognized as one of the most important labor-saving means in which herbage can be utilized more economically. However, in Japan, the practice of grazing is declining due to improved farm management - more animals per farm, greater harvest yield per area and higher production performance. Grazing animals tend to be healthier and more productive than animals kept in confinement. In addition, feed cost of raising dairy heifers on high pasture system is reduced by more than 50 % relative to the conventional (dry lot) system and to 65 % when the cost oflabor and facilities are …
Beef Production From Digitaria Eriantha Subsp. Eriantha In A Sub-Tropical Environment, M B. Hardy, N N. Gray
Beef Production From Digitaria Eriantha Subsp. Eriantha In A Sub-Tropical Environment, M B. Hardy, N N. Gray
IGC Proceedings (1977-2023)
Digitaria eriantha subsp. eriantha, previously known as D. smutsii (Russel and Smook 1980), is a robust perennial grass adapted to a wide range of soils and climatic conditions. In Australia, the species has performed well on a number of sites with soils ranging from« cracking clays to sandy loams» where rainfall varied between 400 and 1000 mm/annum (Strickland 1987). A similar range of adaptability has been recorded in South Africa (Brockett and Gray 1984, Dannhauser 1985). In cutting trials, D. eriantha yielded between 3500 and 15000 kg of dry matter/ha with annual rainfall of 450 and 1200 mm/annum respectively. The …
Performance Of Three Beef Cow Genotypes When Grazing Sown Pasture At Two Sward Heights, I A. Wright, J R. Jones, T J. Maxwell, A.J F. Russel
Performance Of Three Beef Cow Genotypes When Grazing Sown Pasture At Two Sward Heights, I A. Wright, J R. Jones, T J. Maxwell, A.J F. Russel
IGC Proceedings (1977-2023)
In grassland based systems of animal production, it is important to choose a genotype of animal with production characteristics appropriate to the level of nutrition which can be supplied by the available resources. It is generally recognised that the most economically efficient beef cow systems are those that allow the cows to increase levels of body fat when feed is plentiful or cheap (eg. summer grazing in N. Europe) and to draw on those reserves during periods of feed scarcity or when feed is expensive (eg. winter) (Russel and Broadbent, 1985). The ability of cows to increase body reserves during …
Cow-Calf Performance On Cool Season And Warm Season Pasture Systems, J R. Gerrish, F A. Martz, V A. Johnson, R E. Morrow, G B. Garner
Cow-Calf Performance On Cool Season And Warm Season Pasture Systems, J R. Gerrish, F A. Martz, V A. Johnson, R E. Morrow, G B. Garner
IGC Proceedings (1977-2023)
Preweaning growth of beef calves is determined by milk production of the dam and herbage consumption by the calf. These parameters are impacted by quantity of herbage on offer and nutritive quality of the sward. Forage availability and quality are dependent upon species composition and pasture management. In the humid temperate regions, both C3 and C4 species are utilized in grazing programs with traditional grazing management being either continuous or very lax rotations. A grazing study was undertaken to evaluate the preweaning growth of calves and milk production of their dams as impacted by pasture species and intensity of management …
Soil Fertility And Beef Production In The Semi-Arid Sub-Tropics, P C. Kerridge, R W. Mclean
Soil Fertility And Beef Production In The Semi-Arid Sub-Tropics, P C. Kerridge, R W. Mclean
IGC Proceedings (1977-2023)
Two-thirds of the grazing lands in Queensland are on infertile soils, low in organic matter, phosphorus (P) and nitrogen (N) (Weston et al., 1981). Pasture quality is low and average liveweight gain (L WG) of steers on these soils ranges from 0.10 to 0.30 kg/day compared to 0.40 to 0.50 kg/day on more fertile soils. Low herbage production limits carrying capacity to 3-10 ha/animal. The nutritive value can be improved by (i) direct supplementation of animals with N and P, (ii) introduction of a legume together with fertilizer and/or supplement P or (iii) use of heavily fertilized improved grasses ± …
Long-Term Productivity Of Legumes-Based And Pure Grass Pastures In The Eastern Plains Of Colombia, C Lascano, J Estrada
Long-Term Productivity Of Legumes-Based And Pure Grass Pastures In The Eastern Plains Of Colombia, C Lascano, J Estrada
IGC Proceedings (1977-2023)
The savannas of Colombia have acid soils of low fertility, a well defined dry season and an herbaceous native vegetation of low nutritional value (Lascano and Spain, 1986). As a consequence, traditional livestock production is extensive and of low productivity in terms of animal growth and reproduction (Vera and Sere, 1985). An economically attractive alternative to increase cattle production in the savannas of Colombia is through the use of legume-based pastures, provided they are productive and persistent (Nores and Estrada, 1979). This paper presents results on animal production and forage attnbutes of a long-term grazing experiment which includes a grass …
Production And Utilization Of High-Quality Cold-Hardy Forages, D W. Koch, C Kercher, D Agee, R Jones
Production And Utilization Of High-Quality Cold-Hardy Forages, D W. Koch, C Kercher, D Agee, R Jones
IGC Proceedings (1977-2023)
Grazing is generally the least expensive method of forage utilization ; however, in temperate climates the growing season is relatively short and perennial forages are at peak nutritive value for a relatively short time. Brassica spp. have several characteristics which make them prime candidates for extending the grazing season : (1) they mature rapidly (Guillard and Allinson, 1984); (2) they are frost tolerant and maintain high nutrient value well during cold weather (Jung et al., 1984); and (3) they can be established with minimum tillage techniques (Jung et al., 1984; Koch et al., 1987). The purpose of this study was …
First Insight On The Genesis Of Iron Oxide-Hydroxide Biospeleothems In Rancho Chico Lava Tube, Mexico, Rafael López-Martínez, Elizabeth Solleiro-Rebolledo, Rocio Alcántara-Hernández, Teresa Pi Puig, Sergey Sedov, Daisy Valera Fernández, M. Nayeli Luis-Vargas, Yasmany Lima Vera, Jesús Solé, Ramon Espinasa-Pereña
First Insight On The Genesis Of Iron Oxide-Hydroxide Biospeleothems In Rancho Chico Lava Tube, Mexico, Rafael López-Martínez, Elizabeth Solleiro-Rebolledo, Rocio Alcántara-Hernández, Teresa Pi Puig, Sergey Sedov, Daisy Valera Fernández, M. Nayeli Luis-Vargas, Yasmany Lima Vera, Jesús Solé, Ramon Espinasa-Pereña
International Journal of Speleology
Iron is a common element in lava tube systems, typically observed as thin crusts or inferred from the reddish coloration of secondary mineral deposits. In this study, we describe iron oxide-hydroxide biospeleothems discovered in the Rancho Chico Lava Tube, located within the Xalapa Monogenetic Volcanic Field in Mexico. We adopt an integrative approach combining petrography, soil micromorphology, scanning electron microscopy, mineralogy, and 16S rRNA gene metabarcoding. DNA sequencing reveals the presence of microorganisms such as Acidithiobacillus, Gallionella, and members of the Leptospirillaceae family, which may be involved in the oxidation of Fe²⁺ within the lava tube. The source …
Biochar Suppresses Growth, Pupation And Eclosion Success Of A Specialist (Manduca Sexta) And A Generalist (Spodoptera Frugiperda) Insect Herbivore, Nischal Wagle, Soumya Unnikrishnan, Satinderpal Kaur, Engil Isadora Pujol Pereira, Rupesh R. Kariyat
Biochar Suppresses Growth, Pupation And Eclosion Success Of A Specialist (Manduca Sexta) And A Generalist (Spodoptera Frugiperda) Insect Herbivore, Nischal Wagle, Soumya Unnikrishnan, Satinderpal Kaur, Engil Isadora Pujol Pereira, Rupesh R. Kariyat
School of Earth, Environmental, & Marine Sciences Faculty Publications
Biochar is a charcoal-like substance made by the pyrolysis of organic material from agricultural and forestry waste. While biochar is well documented for altering soil physicochemical conditions, few studies have investigated its possible effects on the management of arthropod pests. Tobacco hornworm (Manduca sexta) and fall armyworm (Spodoptera frugiperda, FAW) are specialist and generalist insect herbivores respectively, that can cause significant defoliation in natural and agricultural ecosystems. In this study, we examined whether walnut shell biochar can affect growth and development of these herbivores. Specifically, we investigated how biochar influences parameters such as mass gain, length …
Evaluation Of Tree Legumes Species At Different Agroclimatic Zones Of Indonesia, Mas'ud Panjaitan, R Jessop, W W. Stur
Evaluation Of Tree Legumes Species At Different Agroclimatic Zones Of Indonesia, Mas'ud Panjaitan, R Jessop, W W. Stur
IGC Proceedings (1977-2023)
The population of Indonesia is over 145 million and more than 56 % of them earn their living from agriculture (Bi. Stat. Ind., 1983). A major problem in the development of improved animal production has been the shortage of feed and the generally low nutritive value of tropical forages which limit livestock production in Indonesia (Asian Agriculture Survey, 1969). The production of feed of adequate quality for ruminants is an important consideration particularly for small holders. In many situations, nitrogen fixing legume trees can be used as a high protein feed supplement which improves the utilization of grasses and crop …
Valeur Nutritive D'Un Parcours Mixte A Acacia Cyanophylla, Atriplex Nummularia Et Medicago Arborea, Y Saadani, C Kayouli
Valeur Nutritive D'Un Parcours Mixte A Acacia Cyanophylla, Atriplex Nummularia Et Medicago Arborea, Y Saadani, C Kayouli
IGC Proceedings (1977-2023)
II existe tres peu de donnees concernant la valeur nutritive des arbustes fourragers ; les rares etudes realisees en Tunisie ont porte surtout sur leur productivite, la charge animale et sur leur appetence (Hamrouni et Sarson, 1975; Ben Boubaker, 1985). L'objectif de ce travail est d'etudier la valeur nutritive des feuilles et brindilles d' Acacia cyanophylla, d' A triplex nummularia et de Medicago arborea ainsi que leur contribution dans la ration de caprins et d'ovins.
Forage Production And Nutritive Value Of Leucanea Leucoephala In Southern Puerto Rico, L E. Tergas, R Milton Martinez, A V. Mendez Cruz
Forage Production And Nutritive Value Of Leucanea Leucoephala In Southern Puerto Rico, L E. Tergas, R Milton Martinez, A V. Mendez Cruz
IGC Proceedings (1977-2023)
Leucaena leucocephala (L.) is a perennial schrub native to Mexico, Central America and the Caribbean, considered by investigators as a valuable forage legume because of its capacity for high production of digestible forage with a high protein content and tolerance to drought in semiarid regions with annual rainfall less than 1,000 mm (Skerman, 1977). The soil fertility of the semiarid region in southern Puerto Rico is adequate, but rainfall distribution is limiting for forage production and nutritive value. There is a demand for a suitable and inexpensive source of high quality forage to improve the diet of the grazing cattle …
Apparent Digestibility, Dynamics Of Rumen Fermentation And Sites Of Digestion Of Hays Of Leucaena Leucocephala (Lam) De Wit Cv. Peru, N M. Rodreiguez, I Borges
Apparent Digestibility, Dynamics Of Rumen Fermentation And Sites Of Digestion Of Hays Of Leucaena Leucocephala (Lam) De Wit Cv. Peru, N M. Rodreiguez, I Borges
IGC Proceedings (1977-2023)
Protein deficiency, among others, is a common problem for livestock production in tropical regions. The use oflegumes has been suggested as a solution and Leucaena leucocephala has shown a great potential due to its capacity of nitrogen (N) fixation and dry matter (DM) production (NAS, 1984). However, very little is known about its nutritive value regarding its protein-energy balance and the process of digestion. The present work aimed the evaluation of the nutritive value of hays of Leucaena leucocephala cut at two stages of growth, through trials of apparent digestibility, dynamics of rumen fermentation and partition of digestion.
In Situ Degradation Of Cell Wall Neutral Sugars Of Normal And Brown Midrib Sorghum X Sudangrass Hybrids, K J. Moore, J O. Fritz, E H. Jaster
In Situ Degradation Of Cell Wall Neutral Sugars Of Normal And Brown Midrib Sorghum X Sudangrass Hybrids, K J. Moore, J O. Fritz, E H. Jaster
IGC Proceedings (1977-2023)
The nutritive value of forage for ruminants is limited by the digestibility of the complex polysaccharides cellulose and hemicellulose by rumen microbes. In grasses, the polysaccharide fraction of the cell wall is composed largely of polymers of neutral sugars and to a lesser extent uronic acids. Cellulose is a high molecular weight linear polymer of B-1 ➔ 4) linked Dgluco-pyranose units. Hemicellulose is a complex mixture of linear and branched-chain heteropolymers containing xylose, arabmose, mannose, galactose, glucose, and uronic acids (Van Soest, 1982). Lignification of the cell wall is a primary factor limiting the digestion of cell wall polysaccharides. Close …
Feed Evaluation Using Mobile Dacron Bags And Influences Of The Diet Composition, H Anzola, F N. Owens
Feed Evaluation Using Mobile Dacron Bags And Influences Of The Diet Composition, H Anzola, F N. Owens
IGC Proceedings (1977-2023)
The Mobile Nylon Bag (MNB) technique has been used successfully in protein nutrition studies with swine (Sauer et al., 1983) to determine amino acid availability from protein in specific feedstuffs. Canadian researchers also have tested this technique to predict site of digestion in ruminants (Kirkpatrick and Kennelly, 1987). Differences in small intestinal digestion may explain why animal responses differ to dietary protein sources which have similar ruminal escape values (Owens, 1986). The MNB holds promise to appraise the intestinal availability of undegraded dietary protein though further developmel).t and testing are needed. The objective of this experiment was to examine the …
Sites Of Digestion Of Nitrogen Of Hays Made With The Tropical Legume Neonotonia Wightii, R R. Vera, E A. Pizarro, A Toscano, N M. Rodriguez
Sites Of Digestion Of Nitrogen Of Hays Made With The Tropical Legume Neonotonia Wightii, R R. Vera, E A. Pizarro, A Toscano, N M. Rodriguez
IGC Proceedings (1977-2023)
Tropical pasture species are of well-known lower quality than temperate species and there is evidence that some tropical legumes may contain antiquality factors that reduce further their nutritive value. Nonetheless, the nutritive value of Neonotonia wightii is generally moderate to high (Pizarro et al., 1983 ; Ribeiro et al., 1980), although there is little information on the factors that affect its quality, and none on the rate and sites of digestion within the gastrointestinal tract of ruminants. The aim of the work reported here was to examine the effect of age on the chemical composition, apparent digestibility and sites of …
Nutritive Value Of Perennial Ryegrass Swards Grazed By Sheep In Autumn In The Uk, J A. Milne, H Dove, A M. Sibbald
Nutritive Value Of Perennial Ryegrass Swards Grazed By Sheep In Autumn In The Uk, J A. Milne, H Dove, A M. Sibbald
IGC Proceedings (1977-2023)
A knowledge of the nutrient supply from grazed herbage for ewes in the autumn in N. Europe is required to predict the consequences for their subsequent reproductive performance. Herbage intake has been found to be positively related to sward height over this period at low sward heights but there is no information over a wider range of heights, on the amounts of non-ammonia nitrogen (NAN) available for absorption in the small intestine nor on the digestion of organic matter in the rumen. Experiments on frozen or artificially dried herbage harvested in the autumn have given variable results for the amounts …
Comparison Of Laboratory Methods For Estimating Herbage Digestibility, Francoise Riviere, P Maupetit, G Blanchard
Comparison Of Laboratory Methods For Estimating Herbage Digestibility, Francoise Riviere, P Maupetit, G Blanchard
IGC Proceedings (1977-2023)
Forages are an important source of nutrients for ruminants and recently interest has been shown in using forages for a greater proportion of the nutrients in ruminant production. The feeding value of forages mainly depends on their digestible organic matter contents. Feeding of forages to animals is the most accurate method of evaluation but such trials are expensive and very slow. Many laboratory procedures have been developped for estimating forage nutritive value. Recently, near infrared reflectance has been developped to provide a fast and reliable alternative method. The aim of the study is to compare laboratory methods of forage evaluation …
Enzymatic Solubility And Other Analytic Parameters Predicting Digestibility In Grasses Of Middling Food Value, J Silva Colomer, M Zarate, J C. Guevara, C Fransinelli
Enzymatic Solubility And Other Analytic Parameters Predicting Digestibility In Grasses Of Middling Food Value, J Silva Colomer, M Zarate, J C. Guevara, C Fransinelli
IGC Proceedings (1977-2023)
For a long time, laboratories techniques have been applied to predict "in vivo" digestibility. Among the biological methods, those basing on rumen fluid are the most used in the nutrition laboratories (Osbourn and Siddons, 1980). These techniques, however, present difficulties as the necessity of maintaining rumen-fistulated donor animals, variations in ruminal activity and high cost. For these reasons, the capacity of enzymatic solubility to predict digestibility has been studied in the last few years in different forages : hays, cereal straws, silages and pellets (Aerts et al., 1977 ; Rivero Yeas, 1985), agricultural byproducts (Aerts, 1977; Aguilera and Molina, 1986) …
Use Of Near Infrared Spectroscopy To Assess Nutritional Status Of Cattle Diets On Rangelands, J W. Stuth, E D. Kapes, R K. Lyons
Use Of Near Infrared Spectroscopy To Assess Nutritional Status Of Cattle Diets On Rangelands, J W. Stuth, E D. Kapes, R K. Lyons
IGC Proceedings (1977-2023)
There are two principal means for assessing the quality of grazing ruminant diets, analysis of extrusa from esophageally fistulated animals or indirect estimates from fecal analysis. Wet chemistry methods are well documented for the former but have proven to be of limited value regarding the latter. It is the purpose of this research to determine the suitability of near infrared spectroscopy (NIRS) for estimating diet crude protein (%) and organic matter digestibility (%) directly from extrusa and indirectly from feces.
Near Infrared Reflectance Spectroscopy As An Analytical Tool For World Agriculture, J S. Shenk
Near Infrared Reflectance Spectroscopy As An Analytical Tool For World Agriculture, J S. Shenk
IGC Proceedings (1977-2023)
Agriculture produces the food and fiber needed for human existence. In the past 100 years, it becames apparent that nutrient content and quantity measurements of feed were necessary in livestock feeding programs. During this 100 year period, scientists developed and refined laboratory reference methods for the industry. However, nutritional evaluation of these products was and still is expensive and time consuming. Near infrared spectroscopy (NIRS) analysis offered the promise of rapid low cost analysis of nutrient composition. This analytical method has the potential to overcome the analytical problems facing world agriculture. First reports of NIRS in the literature occured as …