Plant Pathology Commons^™

Activity, Physiology And Milk Production Of Yaks And Two Different Yak Crossbreds Grazing Himalayan Pasture Sites At 4700 M And 3000 M, Shanker R. Barsila, Naba R. Devkota, Michael Kreuzer, Svenja Marquardt

IGC Proceedings (1977-2023)

Yaks (Bos grunniens) and crossbreds of yaks with different local cattle breeds are important for the livelihood of local herders in the Himalayas. They are often kept in a system of transhumance comprising the use of different pasture sites for grazing along an altitudinal gradient throughout the year. The animals are moved upwards to the high altitude pastures in spring/early summer and gradually moved downwards in late summer/autumn. Yaks are suitable for very high altitudes as they are especially adapted to low oxygen partial pressure, forage scarcity and cold and harsh environment (Wiener et al. 2003). However, …

Fatty Acid Metabolism On Pasture- And Feedlot-Finished Cattle, Cuk T. Noviandi, Robert E. Ward, Jong-Su Eun, Dale R. Zobell, Rusty D. Stott, Blair L. Waldron, Mike D. Peel

IGC Proceedings (1977-2023)

Feeding high-grain diets to finishing beef cattle results in high proportions of saturated fatty acids (SFA) in the beef, which is considered to confer negative impacts on human health. In contrast, pasture-finished cattle produce lower proportion of SFA, greater n-3 and less n-6 polyunsaturated fatty acids (PUFA), and higher conjugated linoleic acids (CLA) compared to high grain-finished beef (Noviandi et al. 2012). Increased n-3 PUFA, especially C18:3 n-3, can reduce the risk of heart disease, hypertension, inflammation, and mammary cancer, and lower cholesterol concentration in blood (De Deckere et al. 1998; Tapiero et al. 2002).

Nitrogen fertilisation …

Development Of Feeding System Based On Azolla (Azolla Pinnata) And Sheanut Cake (Vitellaria Paradoxa) For Nellore Sheep Reared In Different Production Systems, K. Sarjan Rao, Y. Ravindra Reddy

IGC Proceedings (1977-2023)

Since protein sources such as ground nut cake and soya bean are too expensive to feed as supplements to livestock in India, steps have been taken to reduce cost by utilizing alternative feedstuffs to replace the traditional sources in ration formulation (Parashuramului et al. 2013). Azolla which is a free-floating nitrogen fixing water fern has a potential to be used as a protein supplement for ruminants (Ahirwar and Leela, 2012). Sheanut cake (Vitellaria paradoxa) which is produced after extraction of fats use in cosmetics and as a cocoa butter substitute in chocolate making, is also a rich …

Lca Study On Sheep Milk Production In Sardinian Farms At Different Input Levels, Enrico Vagnoni, Antonello Franca, Leo Breedveld, Claudio Porqueddu, Pierpaolo Duce

IGC Proceedings (1977-2023)

This paper illustrates a Life Cycle Assessment (LCA) study carried out with the purposes of comparing the environmental impacts of sheep milk production from three different dairy farms in Sardinia, Italy, characterized by different production systems.

Forage Allowance And Cow Genotype, Tools To Increase Animal Production In Native Pastures, Pablo Soca, Mariana Carriquiry, Martín Do Carmo

IGC Proceedings (1977-2023)

In eight plots (four per block) the effects of two FA per two cow genotypes were tested from August 2007 to March 2010, on a Campos grassland (major species were Axonopus affinis, Oxalis sp., Cyperus sp., Cynodon dactylon, Eryngium nudicaule, Gaudinia fragilis, Chevreulia sarmentosa, Stipa setigera, Paspalum notatum and Coelorhachis selloana) in Uruguay (32º 20` S, 54º 26` W). Forage allowance varied seasonally, in HIGH (5, 3, 4 and 4 kg DM/kg LW) and LOW (3, 3, 2 and 2 kg DM/kg LW) during autumn, winter, spring and summer; respectively. Continuous stocking method was …

Herbage Accumulation And Animal Performance On Xaraes Palisade Grass Subjected To Intensities Of Continuous Stocking Management, A. Hernández-Garay, Valéria P. B. Euclides, Sila C. Da Silva, Denise B. Montagner, Nayana N. Nantes, Domicio Nascimento Jr., C. O. Soare

IGC Proceedings (1977-2023)

The large majority of species used in Brazil belong to the Brachiaria and Panicum genus, with marandu paladisadegrass (Brachiaria brizantha (Hochst. ex A. Rich) cv. Marandu) being the main cultivated forage grass species (Santos Filho 1996). Brachiaria brizantha cv. xaraés (xaraes palisade grass) was released as an option for diversifying forage species, and it had the advantages of fast regrowth and herbage yield, favouring larger stocking rates and animal productivity (Euclides et al. 2008; 2009).

The objective of this study was to evaluate herbage accumulation and animal performance of beef cattle steers grazing continuously stocked xaraes …

Herb And Clover Mixes Increase Average Daily Gain (Adg) Of Finishing Lambs In Different Seasons, Sharini C. Somasiri, Paul R. Kenyon, Peter D. Kemp, Patrick C. H. Morel, Stephen T. Morris

IGC Proceedings (1977-2023)

Approximately half of the usable land area in New Zealand is under grasslands (Saggar 2001). Production of lamb meat is seasonal in New Zealand (Fisher 2004) with the majority of lambs born in the spring and slaughtered in late summer and autumn depending on the international demand (Clemens and Babcock 2004) and pasture growth pattern. Finishing lambs outside this window using high quality pastures would help to facilitate a continuous supply of meat to the domestic and international markets. Charlton and Belgrave (1992) and Kemp et al. (2010) reported that the use of herb-clover mixes instead of perennial ryegrass/white …

Cultivar Influences Milk Production Of Grazing Dairy Cows, Mary Mcevoy, Michael O’Donovan, Emer Kennedy, John Paul Murphy, Luc Delaby

IGC Proceedings (1977-2023)

Perennial ryegrass is considered one of the most important forage grass species used in temperate ruminant animal production systems. Maximizing milk production from grazed grass is a major objective of pastoral-based dairy systems. While DM yield is an important trait, it fails to define the ultimate value of a grass cultivar, which is its potential to improve animal performance from a pasture sward (Reed 1994). The majority of cultivar evaluation trials are conducted under cutting, so therefore inferior cultivars from an animal production perspective may not be identified until commercialisation when animals graze a pasture sward. Reed (1978) reported that …

Short-Term Milk Yield Response To Changes In Post-Grazing Sward Height, Elodie Ganche, Luc Delaby, Michael O’Donovan, Tommy M. Boland, Emer Kennedy

IGC Proceedings (1977-2023)

In temperate climates, grazed grass is the cheapest source of nutrients for the dairy cow (Finneran et al. 2010), therefore its utilisation should be optimised throughout the grazing season to increase enterprise profitability (Shalloo et al. 2004). Within spring-calving systems, energy requirements increase for the post-parturient dairy cow during the spring period. On the other hand, spring grass supply can be limited given low over-winter grass growth rates. The imposition of a lower post-grazing sward height (PGH) during this critical time may be a viable solution to increase grass availability. As the season progresses, PGH may be increased …

Introducing Perennials Into Grasslands In South West Australia Increases Gross Margins For Dual Purpose Merino Enterprises, Paul Sanford

IGC Proceedings (1977-2023)

Dual purpose Merino enterprises on the south coast of Western Australia (WA) typically utilise agricultural grasslands that comprise entirely of annual plant species. These grasslands face a range of challenges including a variable Mediterranean climate coupled with mostly infertile fragile sandy soils. As a consequence livestock producers have to manage potentially high supple-mentary feeding costs particularly in summer and autumn while running sufficient livestock to remain profitable. Sowing summer-active perennial species into these grasslands has been shown through short-term livestock trials to allow an increase in stocking rates and reduce the amount of supplement fed. The objective of this investigation …

Efficient Beef Production From Temperate Grasslands In North-Western Europe, Edward G. O’Riordan, Paul Crosson, Mark Mcgee, Padraig O’Kiely

IGC Proceedings (1977-2023)

Ireland’s cool temperate maritime climate is conducive to grass growth and, as a result, ruminant livestock systems have evolved that maximise both grazed pastures and conserved grassland forage as winter feed. Most Irish pastures are permanent, capable of achieving high herbage production (Keating and O’Kiely 2000) and, accordingly, supporting intensive livestock production systems. Most male progeny from the 1.1 million Irish dairy herd are reared as steers, typically slaughtered at 24-26 months of age. Approximately 85% of dairy calves available for beef production are spring-born, usually in February/March (AIMS 2011). The progeny of Holstein-Friesian (Ho/Fr) sires account for 0.5-0.6 of …

Using Grasses Morphogenetic Variables For Natural Grassland Grazing Management, Fernando L. De Quadros, Marta G. Da Rocha, Fábio C. Garagorry, Bruno C. Kuinchtner, Cezar W. Barbieri, Thiago H. N. De Carvalho

IGC Proceedings (1977-2023)

In a perspective of ecologically sustainable agriculture, culturally accepted and economically feasible, natural pastures fits as one of the best options for Southern Brazil region. This study assessed the feasibility of rearing beef heifers from 12 to 18 months of age in natural pasture during its growing season (173 days). We evaluated two rest intervals in a natural pasture managed under rotational grazing. Intervals were defined based on the average thermal sum (degree-days) that fits to leaf expansion duration (average of two leaves) of native species of two grasses functional groups, according to Cruz et al. (2010). Only grasses …

Dietary Effect Of Substituting Panicum Maximum With Tithonia Diversifolia Forage On Performance Of Yankasa Sheep, Adebowale N. Fajemisin, Timayin Salihu, Akinyemi Fadiyimu, Adebayo Alokan, Olusola Agbede

IGC Proceedings (1977-2023)

Ruminant livestock production in Nigeria is based predominantly on native grassland (especially Panicum maximum); the nutritive value of the natural pasture varies drastically according to season (Ademosun.1992). Changes in nutritional status of these native plants result in very irregular growth and marked fluctuations in seasonal weights of farm animals. Consequently, it becomes imperative to source for alternative feed resources which are more efficient, economical and can be incorporated into ruminant’s diet with a view to reducing feed costs and hence, achieving a greater profit margin for the producer. Tithonia diversifolia is an herbaceous weed of field crops and is …

Plantain (Plantago Lanceolata) In Herb And Legume Pastures Increases Lamb Growth Relative To Perennial Ryegrass And White Clover Pasture, Peter D. Kemp, Paul R. Kenyon, Stephen T. Morris, Sharini C. Somasiri

IGC Proceedings (1977-2023)

Increased use of plantain (Plantago lanceolata) by New Zealand farmers has created a demand for a more complete understanding of the performance and manage-ment of plantain by itself and in various combinations with chicory (Cichorium intybus) and legumes such as white clover (Trifolium repens) and red clover (T. pratense). The objective of this study was to evaluate lamb finishing on plantain by itself and combined with chicory, white and red clover as part of a research programme to develop a temperate perennial pasture superior in animal performance to perennial ryegrass and white …

Do Different Breeds Of Dairy Cow Differ In Their Ability To Digest Perennial Ryegrass?, Marion Beecher, Frank Buckley, Tommy M. Boland, Craig Thackaberry, Daniel Enriquez-Hidalgo, Michael O’Donovan, Eva Lewis

IGC Proceedings (1977-2023)

Grazed grass is the cheapest feed source available for ruminant production systems in temperate climates (Finnernan et al. 2010) accounting for 70% and 90% of the diet of dairy cows in Ireland and New Zealand, respectively. Successful operation of grass-based dairy systems is based on achieving large intakes of high quality grass and efficiently converting it into high value milk solids (Prendiville et al. 2010). Prendiville et al. (2009) identified production efficiency differences between Holstein Friesian (HF) and Jersey (J) cows. They found that J had higher milk solids output per 100 kg bodyweight than HF. The …

The Effects On Milk Yield And Composition, And Animal Nitrogen And Phosphorus Status, Of Offering Early-Lactation Dairy Cows Concentrate Feeds Of Differing Crude Protein And Phosphorus Concentrations, Michael P. Reid, Michael O’Donovan, Christopher Elliott, John S. Bailey, Catherine J. Watson, Stan T. J. Lalor, John Paul Murphy, Fergal Coughlan, Eva Lewis

IGC Proceedings (1977-2023)

Milk composition is affected by the dietary concentration of crude protein (CP) (Kung Jr and Huber 1983) and minerals such as phosphorus (P) (Wu and Satter 2000). Milk composition has consequent effects on the processing properties of milk (Dillon et al. 1997). The objective of this study was to determine the effects of offering supplementary concentrate feeds differing in CP and P concentration to lactating dairy cows in the early lactation period (Feb-May) on milk yield and composition, and on animal nitrogen (N) and P status.

Effect Of Forage Allowance On Native Pasture Traits, Stocking Rate And Beef Cow Body Condition, Martín Do Carmo, Mariana Carriquiry, Pablo Soca

IGC Proceedings (1977-2023)

Stocking rate is a poor indicator of grazing intensity because, in contrast to forage allowance, it gives no information of feed availability. Forage allowance (FA), measured as kg of forage dry matter (DM) per kg of live weight (LW), is the ratio between forage mass and stocking rate (Sollenberger et al. 2005). Crossbred cows demonstrated higher production efficiency than purebreds in poor and rich quality pastures (Barlow et al. 1994) but few experiments have been conducted under different FA in Campos grasslands with growing beef steers (Maraschin et al. 1997, Soares et al. 2005), and no …

Effects Of Diet During The First Winter On Replacement Heifer Weight Gain And Body Condition Score During The Subsequent Grazing Season, Emer Kennedy, Fergal Coughlan, Steven Fitzgerald, John Paul Murphy

IGC Proceedings (1977-2023)

In seasonal calving dairy production systems it is important that heifers attain puberty in an appropriate timeframe especially when they are bred to calve at 2 years of age and in systems that impose restricted breeding periods (Ferrell, 1982). Achieving target weights at key time points is critical because, for example, the onset of puberty usually occurs in dairy heifers at 30-40% of their expected mature BW (Heinrichs 1993) which corresponds to approximately 240-320 kg in Holstein heifers. Furthermore, heifers should be managed to achieve 55% to 60% of mature bodyweight (BW) at mating start date (MSD; Patterson et al …

Developing And Implementing Animal Welfare Assessments On Extensive And Intensive Grassland Systems: An Overview, Nguyen Xuan Trach, Bob Kilgour

IGC Proceedings (1977-2023)

While several definitions of animal welfare exist, in this paper we use the concept of the Five Freedoms. The Five Freedoms are freedom from hunger, thirst and malnutrition; freedom from discomfort; freedom from pain, injury and disease; freedom from fear and distress; freedom to perform normal behavior. While the idea of the Five Freedoms has limitations, it is still a widely-used conceptualization of animal welfare and we use it here to discuss the welfare of cattle in intensive and extensive management systems in Vietnam and Australia. Compared to extensive pasture systems, intensive management systems do result in heightened animal welfare …

The Evolving Beef Industry And Its Sustainability In Western China, J. P. Wu, Z. M. Lei, L. P. Zhang, X. R. Wang, S. G. Zhao, C. Q. Zhang, G. H. Sun, S. G. Li

IGC Proceedings (1977-2023)

The beef industry in China has started to develop since the 1980s. Since then, its production system has been evolving significantly from subsistence production towards business operation in farmer households. As demands continue to grow, China will become the largest beef consumption country in the world by the year of 2025. The beef production in China’s western agriculture regions is gaining significant role in the beef industry of China. Utilization of corn stover and other agriculture aftermath is seen as the competitive advantage of development of the beef industry. Over the last 30 years the beef production efficiency has been …