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The Effect Of Addition Of Formic Acid, With Or Without Formalin, On The Conservation Quality, Digestibility, Nutritive Value, And Nitrogen Balance Of Direct-Cut Silage, C Demarquilly, Elisabeth Grenet, J P. Dulphy
The Effect Of Addition Of Formic Acid, With Or Without Formalin, On The Conservation Quality, Digestibility, Nutritive Value, And Nitrogen Balance Of Direct-Cut Silage, C Demarquilly, Elisabeth Grenet, J P. Dulphy
IGC Proceedings (1977-2023)
From 34 standing crops of grasses or legumes, 93 direct-cut silages were prepared: 33 without additive, 37 with formic acid (3.5 or 5 1/t), 10 with formic acid and 1.5 1/t formalin, 15 with formic acid and 3.5 to 5 1/t formalin. The conservation quality of the silages was improved by the addition of formic acid and even further by the mixture of formic acid and formalin. Silage digestibility is similar to that of the corresponding green forage, but the addition of formalin considerably reduces protein digestibility (by 2 to 8 points). The voluntary intake of silage is lower than …
The Effects Of Mixtures Of Formalin And Acid On Silage Fermentation, Robert F. Wilson, Roger J. Wilkins
The Effects Of Mixtures Of Formalin And Acid On Silage Fermentation, Robert F. Wilson, Roger J. Wilkins
IGC Proceedings (1977-2023)
Three experiments are described in which herbages were ensiled in test-tube silos without additive or after the addition of mixtures containing formalin with formic, sulphuric or phosphoric acid in order to restrict fermentation in the silo. Silages containing less than 5 % of the dry matter as fermentation acids and with low contents of ammonia were produced with mixtures containing either 0.1 % of the fresh crop weight as formaldehyde with 10 meq of formic or sulphuric acid/ 100 g of crop or with 0.2 % of formaldehyde with 5 meq of either acid. Phosphoric acid was less effective than …
Effect Of Zinc, Copper, Molybdenum And Cobalt On Develop Ment, Yield And Hay Quality Of Lucerne, B Miskovic, P Eric, M Pantovic
Effect Of Zinc, Copper, Molybdenum And Cobalt On Develop Ment, Yield And Hay Quality Of Lucerne, B Miskovic, P Eric, M Pantovic
IGC Proceedings (1977-2023)
The effect of zinc, copper, molybdenum and cobalt exerted on the development, yield and quality of various cultivated plants is favourable in many ways. Our studies of their application in the nutrition of luceme in a pot experiment and field trials on chernozem soil were carried out to determine the effect of the above microelements on the yield, development and quality of lucerne hay, when applied togeµier with NPK fertilizers. The results of our experiments have shown that the application of these microelements, especially of zinc and copper, together with NPK fertilizers resulted in considerable increase of lucerne hay yields …
Influence Of Mineral Fertilization On The Quality Of Meadow Grasses, A Klesnil, F Turek
Influence Of Mineral Fertilization On The Quality Of Meadow Grasses, A Klesnil, F Turek
IGC Proceedings (1977-2023)
The effect of different rates of nitrogen fertilization combined with PK on the quality of 6 important meadow grasses (Dactylis glomerata, Poa pratensis, Holcus lanatus, Trisetum jlavescens, Alopecurus pratensis, and Deschampsia caespitosa) was studied from 1973 to 1975. Complete NPK nutrition at rates of I 00 and 100 + 50 kg N/ha distinctly increased the digestible crude protein content in the tested grasses, especially in the first cut (in Dactylis glomerata by 44-56 %, in Poa pratensis by 54 %, and in Trisetum jlavescens by 35 %). Application of 50 kg N/ha after the first cut produced maximum increase of …
Experiments About The Nutrition Of Grassland Ecosystems With Respect To Different Times Of Npk Application, Eduard Halva, Josef Lesak
Experiments About The Nutrition Of Grassland Ecosystems With Respect To Different Times Of Npk Application, Eduard Halva, Josef Lesak
IGC Proceedings (1977-2023)
Experiments carried out during the years 1971 to 1973 have shown that a uniform system of the nutrition of grassland associations cannot be introduced into all production areas and all types of forage crops represented in Czechoslovakia. In relation to the complexity of the studied problems and to the diversity of soil and climatic conditions in the production areas, it is necessary to propose the adequate systems of nutrition after several series of experiments or to base them on empirical experience drawn from the studied production area. The testing of different times of application of identical nutrient rates (150 kg …
Problems Of Nitrogen Nutrition Of Medicago Sativa L. With Respect To Rhizobia, Eduard Halva, Josef Lesak
Problems Of Nitrogen Nutrition Of Medicago Sativa L. With Respect To Rhizobia, Eduard Halva, Josef Lesak
IGC Proceedings (1977-2023)
The effect of increasing rates of nitrogen (80, 140, 200, 260, and 320 kg/ha) on the yields of above-ground biomass and nutrients in alfalfa was studied in 1974 and 1975. Application of nitrogen increased dry matter and crude protein production in relation to the unfertilized control, but the yield increase was statistically insignificant. Further it was shown that increasing rates of nitrogen had a negative effect on the number and weight of rhizobia. A close negative correlation of high significance ( estimated by the t-test) was found between the rates of nitrogen and the number of rhizobia. The experiments conducted …
Some Remarks Concerning The Theory Of Nutrition And Biology Of Grass Stands, A Korab
Some Remarks Concerning The Theory Of Nutrition And Biology Of Grass Stands, A Korab
IGC Proceedings (1977-2023)
The growth rate and yielding capacity of grasses, expressed as kg crude protein/ha per unit of time, are dependent upon the plants' capacity to take up and utilize nitrogen. This character is specific in individual grass species and has been found to be more or less hereditarily determined and relatively coincident in different sites. These assumptions and interrelations have been utilized for determining the yield indices to express not only the relative yielding capacity of major cultivated grasses but also their requirements in terms of effective nitrogen nutrition. The principle of determining effective doses of nitrogen using the index method …
The Intensification Of Grass Production Through Nitrogen Fertilization, And The Nitrate Problem, Klau Ebert, Henrich Koriath, Gunter Rinno
The Intensification Of Grass Production Through Nitrogen Fertilization, And The Nitrate Problem, Klau Ebert, Henrich Koriath, Gunter Rinno
IGC Proceedings (1977-2023)
Two-year pot and five-year field tests with increasing nitrogen doses revealed an increase in the nitrate content of forage grasses. In the pot tests the content of 0.25 % N03-N in the dry matter, which is safe in animal nutrition, had by far been exceeded. In the field tests the· nitrate content increased more slowly for the average of the tests and did not reach this limit when giving 140 to 240 kg N/ha. In single cases this value had, however, already been reached when giving 100 kg N/ha. By selecting grass species with a lesser tendency to nitrate accumulation, …
Yield And Nutritive Value Of Forage Plants As Influenced By Stage Of Plant Development At Harvest, Khindrek Older, Ants Linnutaya, Yulo Oll
Yield And Nutritive Value Of Forage Plants As Influenced By Stage Of Plant Development At Harvest, Khindrek Older, Ants Linnutaya, Yulo Oll
IGC Proceedings (1977-2023)
Field experiments were conducted for the purpose of studying yield formation in six singlecrop sown grass species and two clover/grass mixtures, as well as the. chemical composition and in vitro digestibility of the forage as influenced by the stage of plant development at the time of harvest. Highest dry matter yields were obtained from two-cut use with harvesting in flower. Highest digestible dry matter levels were obtained from three-cut use in the stage of shooting. Highest protein levels were recorded in the context of four-cut use in the heading stage. Digestible nutrients were high in the tillering and shooting stages. …
Forage-Animal Systems For Economic Calf Production, R E. Blaser, R C. Hammes Jr, J P. Fontenot, H T. Bryant
Forage-Animal Systems For Economic Calf Production, R E. Blaser, R C. Hammes Jr, J P. Fontenot, H T. Bryant
IGC Proceedings (1977-2023)
Nine forage-cow-calf systems with constant ,stocking but variable grazing pressures to provide for changing nutritional needs of beef cows, and continuous high calf nutrition with creep grazing gave similar high weaning weights of autumn and winter calves for all-year grazing vs. hay feeding and for 2 stocking rates. The all-fescue systems lowered calf weights. Nine forage-cow-calf systems with constant ,stocking but variable grazing pressures to provide for changing nutritional needs of beef cows, and continuous high calf nutrition with creep grazing gave similar high weaning weights of autumn and winter calves for all-year grazing vs. hay feeding and for 2 …
Forage And Feedstuff Analysis With Infrared Reflectance Spectro/Computer System1, J S. Shenk, K H. Norris, R F. Barnes, G W. Fissel
Forage And Feedstuff Analysis With Infrared Reflectance Spectro/Computer System1, J S. Shenk, K H. Norris, R F. Barnes, G W. Fissel
IGC Proceedings (1977-2023)
An infrared reflectance spectro/computer system (IRSCS) has been established at The Pennsylvania State University to evaluate the nutritional quality of forage and feedstuffs. Studies with alfalfa forage clearly show that the reflectance spectral curve of the forage is a composite curve consisting of various chemical constituents in the forage such as water, protein and cellulose. Chemical constituents are not measured directly by IRSCS but calibration prediction equations are developed from samples with known chemical constituents and animal response data. After this is completed, forage samples can be analyzed for multiple chemical constituents and animal responses in less than 2 minutes. …
The Evaluation Of Relationships Between Ecological Factors And Production On Permanent Grassland, Vladimir Krajovic
The Evaluation Of Relationships Between Ecological Factors And Production On Permanent Grassland, Vladimir Krajovic
IGC Proceedings (1977-2023)
On 42 sites in 10 districts of the Carpathian region of the CSSR, relationships were examined between grassland production and regional, climatic (precipitation, temperature, solar radiation), and soil conditions (soil type, pH, S, 'r, V, C0., nutrients, and clay fraction). To this, five variants of fertilization were used (0; PK; 120 kg N/ha + PK, 240 kg N/ha + PK; 480 kg N/ha + PK). None of the natural ecofactors is generally characteristic enough for determining an optimal production. But the nutrition and the utilization of grass stands are important under each condition. Therefore, a system of differentiated grassland management …
Flood Adaptation And Productivity Of Savanna Grasses, E Gonzalez Jimenez, A Escobar
Flood Adaptation And Productivity Of Savanna Grasses, E Gonzalez Jimenez, A Escobar
IGC Proceedings (1977-2023)
Savannas subjected to seasonal flooding occupy· vast areas of the Tropics. Above-ground biomass values for Venezuelan flooded savannas are high and related to the longer availability of water. C3 plants colonized the waterlogged unit and showed the highest productivity and nutritive value. This natural system permits a prolonged grazing season. These first results show the great potential for animal production of this ecosystem, stressing the need for coordinated research efforts in order to gain a better understanding of it.
Influence Of Plant Nutrition And Method Of Utilization On The Accumulation And Decomposition Of Root Matter In Meadow Soils, Yan Liyv, Rikhard Toomre
Influence Of Plant Nutrition And Method Of Utilization On The Accumulation And Decomposition Of Root Matter In Meadow Soils, Yan Liyv, Rikhard Toomre
IGC Proceedings (1977-2023)
Root matter formation of forage plants depends primarily on soil fertility. In fertile soils and under intensive fertilization less root matter is formed than in soils of low fertility. The decomposition of root matter as influenced by microbiological processes was found to be more intensive under grazing than under mowing. The application of high rates of nitrogen fertilizer (more than 200 kg N/ha) over longer periods is likely to cause undesirable changes in the relationship between forage plants and soil microorganisms, this resulting in yield decline and in lower efficiency of the fertilizers applied.
New Problems And Results Of Grass Breeding In The Czechoslovak Socialist Republic, Frantisek Bures
New Problems And Results Of Grass Breeding In The Czechoslovak Socialist Republic, Frantisek Bures
IGC Proceedings (1977-2023)
Turf grass species are among the topics of forage grass breeding in Czechoslovakia at present. Breeding goals, however, are highly differentiated, and testing methods have to be adjusted to that diversity of purposes. Agrostis tenuis Sibth., 'Golf variety, is a perennial turf grass which forms short stolons. Tiller formation has been 263/dm2 on average over several years. Its colour is deep green, and the grass is unpretentious in terms of nutrition and soil. Mean root expansibility is 6.9 per cent, mean tensile strength 3,249 kg/cm2, and average compressive strength 112,768 gcm/cm3. Frequent deep mowing is well tolerated. Variety 'K 7' …
The Environment And Population Differences In Anjan Grass (Cenchrus Ciliaris) In Western India, S C. Pandeya
The Environment And Population Differences In Anjan Grass (Cenchrus Ciliaris) In Western India, S C. Pandeya
IGC Proceedings (1977-2023)
Cenchrus ciliaris (anjan or buffel grass) is a gregarious fodder species with high nutritive value. The species is an inhabitant of drier sandy areas throughout Africa, Canary Island, Madagascar and eastwards to India, where it mostly occurs in western parts of the country, constituting the States of Gujarat, Rajasthan, Hayana and the adjoining portions of Punjab, U ttar Pradesh and Madhya Pradesh ( called here in as Western India). In Western India, Cenchrus ciliaris (Cc) variously dominates the naturally occurring grazing lands exhibiting great morphological variations with respect to habit. and spike characters. The ecoclimate of Western India is arid …
Optimizing The Use Of Grazed Dryland Pasture In Western Oregon, T E. Bedell
Optimizing The Use Of Grazed Dryland Pasture In Western Oregon, T E. Bedell
IGC Proceedings (1977-2023)
When they are properly fertilized, western Oregon dryland pastures of subterranean dover with grasses such as perennial rp:g:rass, tall fescue, and resident annuals produce total annual dry-matter yields averaging 6,500 kg/ha. Some sites are capable of over 9,000 kg/ha. Optimum use of this forage is complicated by its highly seasonal availability. Over 50 % of the total growth occurs from late April to mid-June. Only about 10% takes place during autumn-early winter, and virtually none occurs during summer. Research shows livestock weight gains from 300 to over 700 kg/ha can be expected depending upon pasture mixture and kind of grazing …
Diet Quality Considerations In The Design And Management Of Pastures In Seasonally Dry Tropics Of Australia, R L. Mccown, C J. Gardener
Diet Quality Considerations In The Design And Management Of Pastures In Seasonally Dry Tropics Of Australia, R L. Mccown, C J. Gardener
IGC Proceedings (1977-2023)
Much of Australian tropical-pasture research in the last 20 years has been aimed at filling the "protein gap" of the dry season with a well-adapted legume. Several such legumes are now available, but their contribution to an improved nutritional regimen has been variable. This paper puts forward generalizations as to the contribution of pasture components to cattle nutrition and attempts to apply this information in devising regional strategies for pasture design and management. The contribution of a forage component is a function of (1) its nutritive value and (2) its relative acceptability. Three components emerge as both highly nutritious and …
Development Of A Pasture Research Program For The Tropical Savanna Region Of Brazil, D Thomas, C P. Moore, W Couto, R P. De Andrade, C.M C. Da Rocha, D T. Gomes
Development Of A Pasture Research Program For The Tropical Savanna Region Of Brazil, D Thomas, C P. Moore, W Couto, R P. De Andrade, C.M C. Da Rocha, D T. Gomes
IGC Proceedings (1977-2023)
The tropical savannas (cerrados) of west central Brazil contain almost 40% of the nation's cattle population. However, the low productivity and nutritive value of the native pastures is a serious limitation to cattle production. To improve the nutrition of the grazing animal, a research program has been developed with emphasis on the integrated use of cultivated pastures. The program aims (1) to select species adapted to the cerrados, (2) to determine their nutrient requirements, and (3) to develop methods of establishment and utilization. The program is being conducted at the Cerrados Agricultural Research Center (CP AC) at lat 15°S. Rainfall …
Yield And Quality Of Tropical Legumes During The Dry Season: Galactia Striata (Jacq.) Urb., R R. Vera, E A. Pizarro, M Martins, J.A. C. Viana
Yield And Quality Of Tropical Legumes During The Dry Season: Galactia Striata (Jacq.) Urb., R R. Vera, E A. Pizarro, M Martins, J.A. C. Viana
IGC Proceedings (1977-2023)
A small-plot experiment was conducted during 2 consecutive years in the cerrados of Brazil to evaluate the effect of four dates of deferment (21 February, 7 and 21 March, and 4 April, respectively) on rate of growth, chemical composition, and in-vitro dry-matter digestibility (IVDMD) of a pure stand of Galactia striata, a naturalized legume. The chosen dates of deferment embraced the last 2 months of the rainy season. Yields were estimated at intervals of 28 days, over an experimental period of 237 days, ending with the beginning of the following rainy season. Asymptotic growth was observed throughout the experimental period. …
Changes In Quality And Composition Of Alfalfa During Autumn, S C. Fleming, M Collins, N A. Jorgensen
Changes In Quality And Composition Of Alfalfa During Autumn, S C. Fleming, M Collins, N A. Jorgensen
IGC Proceedings (1977-2023)
Autumn harvest of alfalfa (Medicago sativa L.) offers a potential for obtaining additional forage production during a particular season. Little is known about the quality or changes in the chemical composition of this forage. The objective of this research was to examine changes in chemical composition, dry-matter intake (DMI), and apparent digestibility of alfalfa during autumn in Wisconsin. An established stand of Vernal alfalfa, early bud to midbud, was harvested using a flail harvester on 5 and 20 October and 5 and 18 November 1979. The forage was dried at 55°C for 72 to 96 hours in burlap bags. A …
Animal Production With Controlled And Fixed Stocking And Managed Stocking Rates, R E. Blaser, J T. Johnson, F Mcclaughterty, J P. Fontenot, R C. Hammes Jr, H T. Bryant, D D. Wolf, D A. Mays
Animal Production With Controlled And Fixed Stocking And Managed Stocking Rates, R E. Blaser, J T. Johnson, F Mcclaughterty, J P. Fontenot, R C. Hammes Jr, H T. Bryant, D D. Wolf, D A. Mays
IGC Proceedings (1977-2023)
Grazing experiments were conducted to implement and improve animal-grazing-management systems. The primary objectives were (experiment 1) to investigate animal production with fixed and controlled stocking and (experiment 2) to study animal production and canopy characteristics with three managed stocking rates. Live-weight gains/head for the grazing season were similar for fixed and controlled stocking; during a summer period, gains/head were higher for controlled stocking. Gains/head were not associated with available herbage. The canopies with fixed stocking had 28% to 82% more forage than those with controlled stocking, the former being high in dead tissues and stems. Controlled stocking gave 61 % …
Use Of Principal-Component Analysis In Summarizing Nutritive And Analytical Characteristics Of Forages, O T. Stallcup, C J. Brown, Z B. Johnson, D L. Kreider, J O. York
Use Of Principal-Component Analysis In Summarizing Nutritive And Analytical Characteristics Of Forages, O T. Stallcup, C J. Brown, Z B. Johnson, D L. Kreider, J O. York
IGC Proceedings (1977-2023)
Principal component analysis and other multivariate analyses have not been used extensively to analyze forage data. Our objective was the synthesis and summary of 98 digestion trials on forages using a principal-component analysis. The ten variables studied in all trials were dry matter (DM), crude protein (CP), digestible protein (DP), crude fiber (CF), ether extract (EE), nitrogen-free extract (NFE), ash (A), gross energy (GE), total digestible nutrients (TDN), and digestible energy (DE). Acid detergent fiber (ADF), acid detergent lignin (ADL), and cellulose (C) were summarized, in addition, for some forages. When data on thirteen variables in 24 hays were summarized, …
Yield And Forage Quality Of Panicum Virgatum, J L. Griffin, G A. Jung
Yield And Forage Quality Of Panicum Virgatum, J L. Griffin, G A. Jung
IGC Proceedings (1977-2023)
In the temperate areas of the U.S.A., high temperatures and low soil moisture in summer limit the production of cool-season grasses and, consequently, the size of most beef cow-calf herds. Warm-season grasses, most productive in midsummer, may serve as a supplement to cool-season grasses for grazing and hay. Switchgrass (Panicum virgatum L. ), a warm-season species native to the Great Plains of the U.S.A., was grown on soils low in available phosphorus at two locations in Pennsylvania to determine changes in forage dry-matter yields, leaf (leaf blade): stem (sheath+ stem) ratios, and quality of leaf and stem fractions associated …
Effect Of Experimental Methods On Results Of Voluntary Intake Experiments With Grass Cultivars, U Simon, P Daniel
Effect Of Experimental Methods On Results Of Voluntary Intake Experiments With Grass Cultivars, U Simon, P Daniel
IGC Proceedings (1977-2023)
The amount of forage eaten by farm animals when forage is offered ad libitum is a major factor in the nutritive value of forage grasses. It is influenced by a number of internal and external factors. Experimental results of studies on the subject :reported in the literature are often contradictory, partially because, perhaps, of the methods of evaluation employed. We studied whether and to what extent different experimental procedures influenced the results of intake experiments in grass cultivars. Four cultivars of Lolium perenne differing in ploidy level and precocity were fed to sheep ad libitum, and voluntary intake was assessed …
Effect Of Feeding Level And Forage: Concentrate Ratio On The Digestibility Of Pelleted Diets By Sheep And Cattle, G.M J. Horton, M J. Farmer, B E. Melton, S Sklane
Effect Of Feeding Level And Forage: Concentrate Ratio On The Digestibility Of Pelleted Diets By Sheep And Cattle, G.M J. Horton, M J. Farmer, B E. Melton, S Sklane
IGC Proceedings (1977-2023)
Sheep are frequently used to determine the nutritive value of cattle feeds. However, there is some evidence that digestion coefficients for cattle and sheep may differ and that digestibility may be influenced by feeding level. The purpose of this study was to investigate the effects of feeding level and animal species on the digestibility of pelleted diets containing different ratios of alfalfa hay to barley grain. Five 4O-kg yearling crossbred lambs and four 35O-kg yearling steers were used to evaluate each diet. The six diets were isonitrogenous, containing the following proportions of barley grain and alfalfa hay (percentage as fed …
Nutritive Value Of Cattle Diets On Fertilized And Unfertilized Blue Grama Rangeland, J D. Wallace, F J. Cordova, G B. Donart, R D. Pieper
Nutritive Value Of Cattle Diets On Fertilized And Unfertilized Blue Grama Rangeland, J D. Wallace, F J. Cordova, G B. Donart, R D. Pieper
IGC Proceedings (1977-2023)
Low levels of nitrogen (N) fertilization can substantia1ly increase forage production on native rangeland if adequate precipitation is available. The objective of this study was to_ compare nutritive value of diets selected by Hereford steers grazing unfertilized and N-fertilized (45 kg N/ha) rangeland in south central New Mexico. The study area consisted of two adjacent pastures of approximately 60 ha each, containing comparable areas ofbottomland, upland, and hillside sites. Stocking rates were 4.8 and 2.4 ha/yearling steer for control and N-fertilized pastures, respectively. Dietary samples were collected from esophageally fistulated steers (average weight 308 kg) during early, middle, and late …
Diet Selection By Cattle On Tropical Pastures In Northern Australia, B Walker, M T. Rutherford, P C. Whiteman
Diet Selection By Cattle On Tropical Pastures In Northern Australia, B Walker, M T. Rutherford, P C. Whiteman
IGC Proceedings (1977-2023)
Diet selection by steers in northern Australia on a continuously grazed pasture of Setaria sphacelata var. sericea (Kazungula), Macroptilium atropurpureum (siratro), and Stylosanthes guianensis var. guianensis (Schofield) was studied. The pasture treatment that supported the highest annual weight gains (254 kg/steer) in a stocking-rate experiment had 1.7 steers/ha. Mean annual rain-fall was 1,490 mm, with 70 % falling from December to March. Monthly average temperatures are highest in December (30 .1 °C) and lowest in July (11. 9°C). Pastures were sampled in 1973 (seven 3-day periods) and 1975-1976 (six 3-day periods) with three esophageal fistulated steers. Extrusa samples were analyzed …
Combination Range-Pasture Management In South Florida For A Low-Energy Grassland Program, L L. Yarlett
Combination Range-Pasture Management In South Florida For A Low-Energy Grassland Program, L L. Yarlett
IGC Proceedings (1977-2023)
The semitropical environment of south Florida is favorable for coordinated management of a wide variety of native grass species and improved pasture forages. The decade of the 1980s will emphasize change from forage programs of high energy utilization to those with a low requirement of fossil fuels. For 4 decades, grassland management in south Florida has been primarily pasture establishment created from the rangeland resource. The establishment and management required substantial inputs of fossil fuel. Use and management of rangeland was largely neglected. Ecological concepts as a basis for managing semitropical ranges were not accepted. In recent years practical programs …
Effect Of Herbage Mass And Allowance Upon Herbage Intake By Grazing Dairy Cows, J.A C. Meijs
Effect Of Herbage Mass And Allowance Upon Herbage Intake By Grazing Dairy Cows, J.A C. Meijs
IGC Proceedings (1977-2023)
An adequate supply of nutrients for grazing animals depends on the intake and nutritive value of herbage. Little information is available on factors affecting herbage intake of grazing cows, particularly for grazing systems that do not involve daily change of animals to a new pasture. Our objectives were to determine the effects of variation in herbage mass ( due to variation in stage of maturity) and of herbage allowance on herbage intake by grazing dairy cows and on efficiency of consumption (herbage consumed as a proportion of herbage accumulated). From 1976 to 1979 the herbage intake oflactating cows was determined …