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Articles 361 - 390 of 3654
Full-Text Articles in Entire DC Network
Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich
Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich
IGC Proceedings (1977-2023)
Zambia is a large country (7S2 972 km"Z) with a low population density (about 1 Olkm2), 3 distinct seasons and 3 a8f(!-ecological regions, Each region has a specific temperature and rainfall regime, The country has 2.6 million head of cattle of various breeds concentrated in regions of low (<700 mm) to moderate (8()()..1000 mm) annual rainfall with high to moderate temperatures, Calving and turn off rates are low in the traditional sector, Pasture research started 10 years ago. Work reported here was concentrated in each of the agro-ecologlcal regions. The results suggested that production from local breeds could be improved by adopting and integrating pasture farming.
Potential Yield And Adaptability Of Tropical Forages In Different Ecological Regions Of Burundi, P Brandelard, O Ncamihgo
Potential Yield And Adaptability Of Tropical Forages In Different Ecological Regions Of Burundi, P Brandelard, O Ncamihgo
IGC Proceedings (1977-2023)
The permanent grasslands based mainly on Eragrostis olivacea are (disappearing in Burundi, because of the increasing density of small . farms. As a result, the integration of forage cultivation in the traditional farming systems becomes of vital importance for the survival of livestock production. A 5-year investigation on yields, nutritive value, persistence and adaptability to soil and altitude of several indigenous and introduced tropical forage grasses and legumes in various ecological regions of Burundi led to proposals that some well-adapted species and cultivars be distributed to farmers. Some species, like Tripsacum andersonii, Pennisetum purpureum and Desmodium intortmn, are quite …
Productivity And Nutritive Value Of The New Perennial Protein Fodder Crop Galega Orientalis Lam. Cv. Gale, B Radenovic
Productivity And Nutritive Value Of The New Perennial Protein Fodder Crop Galega Orientalis Lam. Cv. Gale, B Radenovic
IGC Proceedings (1977-2023)
Galega orienalis Lam. cv. Gale was first sown in Yugoslavia in 1991, in the north Backa region. The yields of green mass and hay, and crude protein, crude fat, ash and dry matter (DM) contents, obtained from 2 swaths in the year of sowing were much higher than those obtained from lucerne as the control crop.
Ponded Pasture Systems For Beef Production In Seasonally Dry Zones Of Northern Australia, J H. Wildin
Ponded Pasture Systems For Beef Production In Seasonally Dry Zones Of Northern Australia, J H. Wildin
IGC Proceedings (1977-2023)
In northern Australia's monsoonal zone the dry season nutritional stress is a major constraint to beef production. Between May and November the quality of dry native pastures is extremely low, particularly in digestibility, nitrogen and mineral content, and cattle lose weight. To overcome this serious constraint many innovative technologies in cattle husbandry, supplementary feeding and improved pastures have been developed, Growing water-loving grasses for green forage in the dry season using wet season water in artificial ponds is a permanent forage system being adopted commercially in central Queensland and other regions of northern Australia. Para grass (Bracltiaria mutica) …
Genetic Improvement And Nutritive Value Of Lucerne: Crude Protein Content, P Rotili, G Gnocchi, C Scotti
Genetic Improvement And Nutritive Value Of Lucerne: Crude Protein Content, P Rotili, G Gnocchi, C Scotti
IGC Proceedings (1977-2023)
Stratigraphical analysis of a lucerne (Medicago saliva L.) stand was made to show the effect of leaf age and health, and of leaf-stem ratio, on crude protein content, These data show that when the analysis was made on stems of the same age and on leaves of the same age, health and physiological state, the variability of this trait is negligible, which makes it very difficult to breed for crude protein content. Nevertheless ii is possible to improve the protein content by selection for physiological trails such as leaf persistence and tolerance of early culling.
Plant Improvement: The Evaluation And Extension Processes, A S. Laidlaw, K.F M. Reed
Plant Improvement: The Evaluation And Extension Processes, A S. Laidlaw, K.F M. Reed
IGC Proceedings (1977-2023)
Registration and evaluation systems throughout the world range from voluntary registration to compulsory schemes involving assessment of taxonomic and agronomic characteristics. Evaluation can be confined to agronomic tests simulated under grazing management or extended to feeding-value trials. Criteria include adaptation to climate and soils, persistence and seasonal growth, annual dry matter production, resistance to pests and diseases, and association with beneficial organisms. The need for stress (e.g. drought, low nutrients, acidity, salinity, heat or cold) to be given more emphasis in programmes in specific localities is suggested. In developing regions the emphasis is screening a wide range of grasses and …
Achievements And Perspectives In The Breeding Of Forage Grasses And Legumes, A.J P. Van Wijk, J G. Boonman, W Rumball
Achievements And Perspectives In The Breeding Of Forage Grasses And Legumes, A.J P. Van Wijk, J G. Boonman, W Rumball
IGC Proceedings (1977-2023)
Successful breeding progrnmmes on forage grasses and legumes have in common that they made seed and plant material of superior genetic and physical quality available to the end-user at competitive prices. This was achieved by government- and privately-funded breeding programmes. A distinction between these two types of breeding organisations is made and discussed. Achievements in various areas are presented and the constraints the breeder is faced with ore given. It is felt that highly advanced genetic designs are not directly applicable, but that progress can continue to be made by applying classical procedures at a greater level of efficiency.
Nutritive Value Of Regrowth Of Pennisetum Parents And Hybrid Progeny, S C. Schank, D A. Diz, R L. Smith
Nutritive Value Of Regrowth Of Pennisetum Parents And Hybrid Progeny, S C. Schank, D A. Diz, R L. Smith
IGC Proceedings (1977-2023)
Low forage nutritive value of the giant forms of elephantgrass (Pen,1isetum purpureum Schum.) has limited its production In tropical areas. A dwarf cultivar, Motl ·(released In 1988), has given convincing evidence of much higher forage quality. A tall elephantgrass (cv. Kinggrass, USDA PI 300086) was hybridised with Moll. Over 400 lntraspecific hybrids were obtained in 1988 and evaluated. Yield and forage 11utrillve value of the two parents and selected progeny were compared. Dry matter production was measured at 6-week regrowth and 12-week regrowth during 1990. Samples collected were analysed for in vitro digestible organic matter (IVDOM) and crude protein (CP), …
Is There Variability For Quality In Red Clover, C Moussett-Declas, F Faurie, J L. Tisserand
Is There Variability For Quality In Red Clover, C Moussett-Declas, F Faurie, J L. Tisserand
IGC Proceedings (1977-2023)
At Dijon (Prance), 36 varieties of red clover (Trifolium pratense L.) (24 diploids and 12 tetraplolds) were analysed for dry matter (DM), crude protein (CP), water-soluble carbohydrates (WSC), dry matter digestibility (DMD) and silage parameters in the primary growth. All the forage compounds analysed were significantly different, WSC mean was 5.6291,, much lower than previously reported. The tetraploid varieties appeared better than diploids for CP, WSC and DMD but poorer for DM, All the silages (except two) had excellent quality with pH under 4,0 and volatile fatty acids (VFA) content under 400 mM/kg DM, Selection for quality of forage …
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 (1977-2023)
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 …
Composition Of The Fractions Of Dry, Mature Subterranean Clover Digested In Vivo And In Vitro, L Klein, S K. Baker
Composition Of The Fractions Of Dry, Mature Subterranean Clover Digested In Vivo And In Vitro, L Klein, S K. Baker
IGC Proceedings (1977-2023)
A modified pepsin-cellulase procedure was used to improve the prediction of in vivo digestibility of dry, mature subterranean clovers (Trifolium subterraneum). Feed, faeces, and the residues from this /11 vitro procedure and the i11 vitro procedure of Tilley & Terry were analysed for protein, ash and fibre fractions lo determine the composition of the cell-wall functions that were digested. The extent of digestion of the cell-wall fractions differed between the two in vitro procedures, but the cell-wall fraction that was digested contained similar proportions of cellulose, hemicellulose, protein and lignin. The cellulose and protein contents of the cell-wall digested …
Assessing, Restoring, And Centering Social–Ecological Relationships For Advancing Social–Ecological Resilience In The Northern Great Plains Grasslands, Katia Pilar Carranza Bernal
Assessing, Restoring, And Centering Social–Ecological Relationships For Advancing Social–Ecological Resilience In The Northern Great Plains Grasslands, Katia Pilar Carranza Bernal
School of Natural Resources: Dissertations, Theses, and Student Research
The Northern Great Plains grasslands are social-ecological systems that were shaped by evolutionary and Indigenous social-ecological relationships. European colonization disrupted many of these interactions, including the coupling of fire and grazing, and degraded social-ecological resilience, shifting these grasslands to a new state. For those reasons, my research focused on assessing, restoring, and centering evolutionary and Indigenous social-ecological relationships for advancing social-ecological resilience in the Northern Great Plains grasslands. I first performed a study in the Nebraska Sandhillls assessing the potential of patch-burn grazing to support grassland resilience by comparing its effects to those of rotational grazing. Through vegetation and bird …
The 'Pendulum Paradigm' - Trends In Nitrogen Fertilizer Use On Temperate Grass/ Clover Pastures, R J. Eckard, F R. Mckenzie, P A. Lane
The 'Pendulum Paradigm' - Trends In Nitrogen Fertilizer Use On Temperate Grass/ Clover Pastures, R J. Eckard, F R. Mckenzie, P A. Lane
IGC Proceedings (1977-2023)
Nitrogen fertiliser responses, on perennial ryegrass (Lolium perenne) / white clover (Trifolium repens) dominant pastures, are compared between sub-tropical South Africa and temperate Australia. The data highlight the similarity in inflection point of the response curve, while emphasising the influence of high residual soil N at lower N application rates. The propensity of communities to oscillate between extremes in terms of N fertiliser use on intensive pasture, or the ‘Pendulum Paradigm’ is discussed. Particular reference is made to the dramatic increase in N fertiliser use in dairy pasture of temperate Australia and New Zealand. Emphasis is …
Estimation Of Herbage Intake Of High Producing Milking Cows Under Intensive Grazing With A Supplementary Feeding Method In Northern Japan, K Ohiai, K Sudo, T Ikeda, T Honma
Estimation Of Herbage Intake Of High Producing Milking Cows Under Intensive Grazing With A Supplementary Feeding Method In Northern Japan, K Ohiai, K Sudo, T Ikeda, T Honma
IGC Proceedings (1977-2023)
The objective of this study was to estimate the herbage intake and to assess a supplementary feeding method for high producing milk cows under intensive grazing. Eight high producing milking cows were grazed rotationally on perennial ryegrass (Lolium perenne L) dominant mixed pasture and on meadow fescue (Festuca elatior L) dominant mixed pasture, changing rotation period and grazing area ccording to seasonal pasture growth rate. Pasture intakes were estimated to be about 2% of body weight by TDN requirements estimation of animals. A supplementary feeding method is examined to be proper for high producing milking cows under …
Selective Sheep Grazing In An Heterogeneous Wheatgrass Dominated Pasture Related To Stocking Rate, G L. Siffredi, M A. Brizuela, M S. Cid, C Cangiano
Selective Sheep Grazing In An Heterogeneous Wheatgrass Dominated Pasture Related To Stocking Rate, G L. Siffredi, M A. Brizuela, M S. Cid, C Cangiano
IGC Proceedings (1977-2023)
It has been hypothesized that patch and community selection are driven by forage quality and/or quantity. We assess the relationship between vegetation characteristics and community and patch selection by sheep under continuous grazing at different stocking rates in an heterogeneous pasture. Our results suggest that when communities strongly differed in nutritive value sheep recurrently select the higher quality community in spite of its low biomass. However, sheep do not completely exclude the poorer quality community, generating a patchy vegetation pattern.
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 (1977-2023)
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 …
Trace Mineral Status Of Beef Cattle Grazing Semiarid Rangelands Of North Mexico, J R. Kawas, G T. Armienta, E Olivares, O Torress, J J. Kawas, F Garza
Trace Mineral Status Of Beef Cattle Grazing Semiarid Rangelands Of North Mexico, J R. Kawas, G T. Armienta, E Olivares, O Torress, J J. Kawas, F Garza
IGC Proceedings (1977-2023)
Trace mineral concentrations of soil, forage and serum of range cattle of the northeast Mexico state of Nuevo Leon were determined in both wet and dry seasons of 1992. For each season, collections were made at twenty-four ranches within eleven counties of three regions. A total of 220 soil, 680 forage and 220 blood samples were collected and analyzed. No differences (P<0.05) between regions were obtained for Zinc (28.0 to 34.9 ppm) or Copper (4.4 to 5.4 ppm). Molybdenum concentrations were greater in the northern (2.1 ppm) than in the central (1.6 ppm) or southern (1.5 ppm) regions. Considering the critical levels in forages for Zinc (30 ppm) and Copper (10 ppm) reported by the National Research Council (1984), Zinc concentrations may be marginally deficient, whereas Copper concentrations were deficient in all three regions, in both seasons, and in grasses and woody species.
Forage-Based Seasonal Dairying In South Louisiana, H A. Deramus, L Labbe, K Ingawa, W A. Atkinson, M J. Simon, J D. Roussel
Forage-Based Seasonal Dairying In South Louisiana, H A. Deramus, L Labbe, K Ingawa, W A. Atkinson, M J. Simon, J D. Roussel
IGC Proceedings (1977-2023)
The effects on the net profit and total milk production were compared using two levels of grain supplementation and forage-only feeding in a program of seasonal dairying in South Louisiana using management intensive grazing. Treatments were 8 kg grain, 4 kg grain, and 0 grain supplementation. Annual ryegrass (Lolium multiflorium) and clovers (Trifolium incarnatum, and T. Alexandrinum) were grazed intensively with 51 multiparous Jersey and Holstein cows in mid-lactation in 1993-1995. Milk production, milk fat, milk protein, and blood urea nitrogen were measured. Milk and protein models were all highly significant for all classes. Daily milk …
Influence Of Sheep And Goats On The Natural Succession, H D. Matthes, S Demise, M Schubert, H Mohring
Influence Of Sheep And Goats On The Natural Succession, H D. Matthes, S Demise, M Schubert, H Mohring
IGC Proceedings (1977-2023)
A study was conducted to examine the effect of extensively-grazed pasture on the botanical composition. The trails were carried out in the year 1992 to 1995. For the study different breeds of sheep with the stocking rate of 30 sheep with their lambs / 2.6 ha were used. For the mixed-grazing a ratio of 20 sheep and 10 goats with their lambs / 2.6 ha were used. It is not possible to control all problem species with the help of sheepgrazing only. In contrast to that, it was concluded that goats grazed off all problem species quite effectively. Botanical composition …
Effects Of Two Grazing Conditions On The Reproductive Achievement Of Male Alpaca In The Northern Peru Grasslands, C Pinares, E Malpartida, S Cortez
Effects Of Two Grazing Conditions On The Reproductive Achievement Of Male Alpaca In The Northern Peru Grasslands, C Pinares, E Malpartida, S Cortez
IGC Proceedings (1977-2023)
Alpaca have recently been introduced to the northern Peru grasslands (Jalca). Effects of two systems of grazing management, co-grazing (with sheep) under fair grassland condition (CGFC) versus exclusive grazing under good grassland condition (EGGC), upon the reproductive achievement was examined from the 6th to the 16th month of age. Each system involved 20 Huacaya animals, managed by individual herders. Availability of herbage preferred by alpaca (HMA) and animal measurements (herbage intake, liveweight, testicle size, penis release from preputial attachments, plasma testosterone) were monitored monthly. Puberty, judged by the penis release from the preputial attachments, was achieved by 7 …
Oat Grazing: Forage Composition And Supplementation Response, A J. Freddi, M J. Arzadun, A A. Pissani, P Sastre
Oat Grazing: Forage Composition And Supplementation Response, A J. Freddi, M J. Arzadun, A A. Pissani, P Sastre
IGC Proceedings (1977-2023)
Oat forage (Avena sativa), which has low soluble carbohydrates (SC) and high soluble protein (SP) content, can reduce liveweight gain of grazing animals; supplementation with grain and low degradability protein may serve to counteract the effect. A grazing trial was carried out on two soils with different nitrogen (NO3 -) availability, from 16 April 1994 to 6 September 1994. Steers were randomly allocated to 3 treatments: low nitrogen (LN), high nitrogen (HN) and high nitrogen with supplementation (HNS). Forage of LN showed lower SP (p<0.05) during the first month of grazing, and higher SC (p<0.05), than HN during the first two months of the trial. Animal liveweight gain was: 892, 909 and 775 g/an/day for LN, HNS and HN, respectively, with animals in HN of significantly lower liveweight gain (p<0.05). Under the conditions of this trial, animals grazing on oat forage with lower SC and higher SP had lower liveweight gain and responded to supplementation.
Native And Introduced Forage Systems For Cow-Calf Production, S W. Coleman, W A. Phillips, J D. Volesky
Native And Introduced Forage Systems For Cow-Calf Production, S W. Coleman, W A. Phillips, J D. Volesky
IGC Proceedings (1977-2023)
The objectives of this study was to compare a highly productive introduced warm-season perennial grass to native range for cowcalf production over two years. Three systems, 1) native range with pelleted soybean or cottonseed meal as winter protein supplement (NC); 2) native range with wheat pasture (NW); and 3) Plains Bluestem with wheat pasture (PB) were compared. Protein supplements were given twice weekly and cows grazing wheat pasture were allowed 6 hrs to graze. Cows on NW were heavier with higher condition at breeding in the spring of 1994 than those on NC and cows on PB were heavier and …
Relationship Between Height And Sward Quality In Rotational Dairy Systems, M R. Mosquera-Losada, A Gonzalez-Rodriguez
Relationship Between Height And Sward Quality In Rotational Dairy Systems, M R. Mosquera-Losada, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
Height is a good guide for management in dairy systems.Intake by dairy cows depends on amount offered and quality of pasture and for this reason a relationship between that offered and pasture quality with height should be studied. The experiment was conducted in NW of Spain with three different stocking rates in dairy systems. A lower quality sward was found in the taller offered pasture as indicated by its higher ADF and lower CP percentages. Total sward ADF (kg x ha-a) was higher in taller offered pasture, which indicated a lower pasture quality, however the total CP was positively related …
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All, Djordjevic-Milosevic Suzana, Negovanovic Dragan, Zakonovic Miodrag
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All, Djordjevic-Milosevic Suzana, Negovanovic Dragan, Zakonovic Miodrag
IGC Proceedings (1977-2023)
Natural grasslands are the base of the livestock production in the hilly-mountainous regions of Yugoslavia. Poor economic power of the owners of these areas brought about a complete dying out of agricultural production in these regions in the last few years. In the same time, the lack of financial resources made it impossible for the farmers to use the fertilisers, protective and other chemical agents which result in a high degree of environmental preservation. Due to current economic policy at this time the population has moved out and there is no industrialisation. The revival of agriculture on the hilly-mountainous regions …
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil, V.P B. Euclides, M.C M. Macedo, M P. Oliveira
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil, V.P B. Euclides, M.C M. Macedo, M P. Oliveira
IGC Proceedings (1977-2023)
A 3-year grazing trial was conducted, to study animal production on degraded grass pastures, renovated by two levels of fertilization. All paddocks were divided into halves: one received 1.5 t/ha of dolomitic limestone, 400 kg/ha of a fertilizer formula 0-16-18 and 50 kg/ha of microelements (FL1); and the other 3.0 t/ha , 800 kg/ha and 50 kg/ ha of the same fertilizers (FL2). Productivity on FL2 pastures was greater than that on FL1 pastures, averaging 565 and 395 kg of liveweight gain (LWG)/ha/year, respectively. For all grasses the productivity in both fertilizer treatments decreased linearly from the first to the …
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan, K Sudo, K Ochiai, T Ikeda
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan, K Sudo, K Ochiai, T Ikeda
IGC Proceedings (1977-2023)
The prupose of this research was to investigate characteristics of grass species under different conditions appropriate to the intensive grazing system for high producing cows (8000 kg for a 305-day lactation) in northern Japan. Meadow fescue (Festuca elatior L.), timothy (Phleum pratense L.) and perennial ryegrass (Lolium perene L.) white clover (Trifolium repens L.) pastures were established and divided into two plots by difference of regulated plant height (meadow fescue and timothy) or of stocking intensity (perennial ryegrass). Each plot was 60m2 and was grazed when plant height reached 20cm or 30cm. Meadow fescue and perennial …
Strategic Use Of Brachiaria Decumbens Pasture To Beef Heifers During Dry Season, E G. Cardoso, N F. Seiffert, J Marques Da Silva, V.P. B. Euclides, J M. Vieira
Strategic Use Of Brachiaria Decumbens Pasture To Beef Heifers During Dry Season, E G. Cardoso, N F. Seiffert, J Marques Da Silva, V.P. B. Euclides, J M. Vieira
IGC Proceedings (1977-2023)
The main objective of this study was to evaluate a Brachiaria decumbens pasture, instead of a common rangeland, for zebu beef heifers during the dry season of the year as a means of anticipating the first calving age from four to three years of age, and so improve the production rate of the herd. Daily liveweight gains (DLWG) were analyzed for the effects of year and three stocking rates during the dry season (SR1=1.5; SR2=2.0 and SR3=2.5 head/ha). The main effect on heifers DLWG was the year (P<0.01), but SR was also important (P<0.05), mainly during the last half of the dry season when pastures are under severe constraints such as soil moisture deficit and low temperatures. The lowest SR presented the highest DLWG (0.204a, 0.174ab and 0.145b kg/head, respectively for SR1, SR2 and SR3), during the dry season. If climatic conditions are not exceptionally bad, heifer first calving occurs at 37 months of age when reared on B. decumbens.
Intensive Rotational Grazing Systems For Dairying In A Subtropical Environment: Animal, Plant, And Soil Responses, J H. Fike, C R. Staples, L E. Sollenberger, D A. Graetz
Intensive Rotational Grazing Systems For Dairying In A Subtropical Environment: Animal, Plant, And Soil Responses, J H. Fike, C R. Staples, L E. Sollenberger, D A. Graetz
IGC Proceedings (1977-2023)
Forage species, stocking rate, and supplementation rate effects upon performance of lactating dairy cows were studied. Forage mass and nutritive value and nutrient concentration in shallow groundwater also were measured. Cows (n = 44) grazed bermudagrass (Cynodon dactylon) or rhizoma peanut (Arachis glabrata), stocked at 4.9 or 7.4 cows ha-1, and 2.5 or 4.9 cows ha-1, respectively. Pelleted concentrate:whole cottonseed (80:20) was offered twice daily post milking at 1 kg per 2 or 3 kg of daily milk production. Cows grazing rhizoma peanut produced more (P = .076) milk per day but had greater (P = …
Intake Of High Producing Holstein Cows Grazing Pasture Or Fed A Total Mixed Ration, E S. Kolver, L D. Muller
Intake Of High Producing Holstein Cows Grazing Pasture Or Fed A Total Mixed Ration, E S. Kolver, L D. Muller
IGC Proceedings (1977-2023)
The ability of a pasture diet to support a high dry matter intake without supplementary feed was determined using 16 high producing Holstein cows. Cows (n=8) were adapted to an all-pasture diet by incrementally reducing the amount of total mixed ration (TMR) fed over four weeks. A control group of cows (n=8) remained in confinement and were fed a TMR. Performance of grazing cows differed significantly (P < 0.001) from TMR fed cows by intake (19.0 vs. 23.4 kg DM/d), milk production (29.6 vs. 44.1 kg/d), milk protein content (2.61 vs. 2.80%), liveweight (562.1 vs. 597.3 kg), and condition score (2.02 vs. 2.50). Results indicate that intake of good quality pasture is higher than previously estimated for high producing Holstein cows in the USA, but that milk production is 15 kg/d less than when cows are fed a TMR.
Cattle Production And Botanical Composition In Continuously Stocked Grass-Clover Swards, A Elgersma, H Schlepers
Cattle Production And Botanical Composition In Continuously Stocked Grass-Clover Swards, A Elgersma, H Schlepers
IGC Proceedings (1977-2023)
The performance of grass-clover mixtures was evaluated under cattle grazing, and the relations between grass variety, clover content and animal production were studied during four years at three locations. The prostrate diploid perennial ryegrass variety formed a dense sward with less clover and less weeds than the tetraploid or the erect diploid ryegrass varieties, which contained about the same amount of clover in the mixture. The ryegrass tiller density was lowest in the tetraploid. These differences between mixtures were not reflected in differences in animal performance or net energy production.