The Relationship Between Intensity of Grazing and the Herbage Consumption and Growth of Calves

Hodgson, J.; Tayler, J. C.; Lonsdale, C. R.

doi:10.1111/j.1365-2494.1971.tb00669.x

Cited by 43 publications

(23 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Standardized photographs of 1 m 2 from above were taken and the height of the vegetation was measured at the level below which about 80% of the vegetation was estimated to be growing (following Hodgson et al 1971;Stewart et al 2001) every 2 weeks in the ruderal vegetation strips and the adjacent meadow. The percentage of open ground in both vegetation types was estimated from the photographs using a grid of 2,500 points.…”

Section: Study Design and Vegetationmentioning

confidence: 99%

Habitat structure versus food abundance: the importance of sparse vegetation for the common redstart Phoenicurus phoenicurus

et al. 2009

View full text Add to dashboard Cite

As many other birds breeding in agricultural areas, the common redstart declined strongly in many Central European countries over the last 60 years. The destruction of traditionally managed orchards, an important breeding habitat in Central Europe, is a relevant cause. An additional factor for the decline of this species could be the intensified management of the ground vegetation in orchards through reducing food availability and lowering prey detectability and accessibility. In this study we examined the importance of surfaces with sparse vegetation for the location of redstart territories and for foraging. To validate the results of these field studies we made habitat-choice experiments in aviaries with captive birds. Territories occupied by redstarts in orchards of northwestern Switzerland contained a significantly higher proportion of surfaces with sparse vegetation than unoccupied control sites. Redstarts made almost five times more hunting flights into experimentally established ruderal vegetation strips than into adjacent unmown meadows. No difference was observed when the meadow was freshly mown. Vegetation height and the proportion of open ground surface correctly predicted the vegetation type for hunting in 77% of the cases. Experiments in aviaries offering two types of sparse vegetation and a dense meadow supported the results of the field experiments. Even a four-fold increase of the food abundance in the meadow did not lead to a noticeable change in preference for the sparse vegetation types. For the conservation of the common redstart, not only traditionally managed orchards with tall trees with cavities should be preserved but also areas with sparse vegetation should be favored.

show abstract

Section: Study Design and Vegetationmentioning

confidence: 99%

Habitat structure versus food abundance: the importance of sparse vegetation for the common redstart Phoenicurus phoenicurus

et al. 2009

View full text Add to dashboard Cite

show abstract

“…The quantity of herbage per unit area available for grazing was estimated on Monday and Thursday of each week by cutting one quadrat (20 x 60 cm) per plot at ground level within the grazing block in use. Twenty measurements of sward height were taken from grazed and ungrazed strips within each paddock (Hodgson, Tayler & Lonsdale, 1971) at the midpoint of each herbage-intake period.…”

Section: Measurementsmentioning

confidence: 99%

Milk-fed calves:4. The effect of herbage allowance and milk intake upon herbage intake and performance of grazing calves

Baker

Barker

1978

J. Agric. Sci.

View full text Add to dashboard Cite

The effect of herbage allowance and milk intake upon herbage intake and performance was investigated using 48 Hereford x Friesian calves purchased at 10-12 days of age and reared on reconstituted milk substitute. Groups of 24 calves were fed low (L) or high (H) daily quantities of milk normally associated with 240-day lactation yields of 1000 or 2000 kg. Six calves on each milk treatment were allocated to four daily herbage allowances during the grazing season. These were 20, 40, 60 or 80 g/kg herbage dry matter/kg live weight.There was no effect of herbage allowance before day 95; thereafter both herbage intake and live-weight gain of the L20 and H20 groups were depressed. The effect was greatest for the L calves. Additional milk consumption reduced herbage intake at all herbage allowances. Milk intake influenced the extent to which calves were buffered from the effects of a low herbage allowance.

show abstract

“…A variável CA deve ser relacionada à oferta alimentar disponível aos animais (Fagundes et al, 2003), uma vez que menor número de animais por unidade de área permite maior crescimento da pastagem (Hodgson, 1971).…”

Section: Resultsunclassified

Efeitos de diferentes intensidades de pastejo em pastagem nativa melhorada sobre o desempenho animal

et al. 2006

View full text Add to dashboard Cite

RESUMO -Objetivou-se avaliar o efeito de duas intensidades de pastejo sobre a produção animal em pastagem natural sobressemeada com espécies leguminosas exóticas (trevo branco, Trifolium repens; trevo vermelho, Trifolium pratense; e cornichão, Lotus corniculatus) sob pastejo contínuo com taxa de lotação variável. Os tratamentos consistiram de duas massas de forragem: baixa massa de forragem (MB) (1.021 kg de MS/ha) e alta massa de forragem (MA) (1.751 kg de MS/ha). As avaliações da pastagem e dos animais foram realizadas em intervalos de aproximadamente 30 dias. Houve forte interação tratamento × período experimental para a variável carga animal, que apresentou médias de 690 e 437 kg de MS/ha para MB e MA, respectivamente. O tratamento de MA (480 g/animal/dia) resultou em ganho de peso médio diário superior ao MB (282 g/animal/dia). Não houve diferença significativa entre os tratamentos para produção animal total por área, observando-se valores de 231 e 207 kg/ha para MA e MB, respectivamente. Este resultados indicam que o manejo das pastagens nativas deve ser conduzido com valores de massa de forragem próximos a 1.700 kg MS/ha, pois mantêm satisfatória taxa de ganho dos animais.Palavras-chave: campo nativo, introdução de espécies, massa de forragem, produção animal Effect of grazing intensities on animal performance grazing native pastureABSTRACT -A grazing trial was carried out to evaluate the effect of two forage masses on the animal yield from natural pasture over-sown with exotic legumes species (white clover -Trifolium repens, red clover -Trifolium pratense and birdsfoottrifoil -Lotus corniculatus). The grazing method consisted of a variable continuous stocking rate over the period from July 2003 to April 2004. The experimental treatments were two forage masses: low forage mass (LFM) (1,021 kg of DM/ha) and high forage mass (HFM) (1,751 kg of DM/ha). Pasture and animal evaluations were accomplished nearly at 30 days intervals. Heavy treatment × experimental period interaction was observed for the stocking rate that showed an average of 690 and 437 kg of DM/ha to LFM and HFM respectively. Forage mass affected the animal average daily gain estimates of 480 and 262 g/animal/day for HFM and LFM, respectively, but had no effect on animal body weight yield per unit of land area estimates of 231 and 207 kg/ha for the LFM and HFM, respectively. These results point out that the improved natural pasture management must be accomplished under herbage mass valus near to 1,700 DM/ha, because it maintain good weight gain rate.Key Words: animal production, forage masses, natural pasture, species introduction IntroduçãoA produção bovina em pastagem natural é uma atividade ecologicamente sustentável, mas seus índices produtivos expõem a fragilidade econômica do sistema, que tem perdido espaço para lavouras anuais e permanentes e pastagens cultivadas. Vários fatores contribuem para a diminuição da área de campo natural, destacando-se os baixos índices produtivos dos rebanhos, a baixa rentabilidade do produtor e a boa lucrati...

show abstract

The Relationship Between Intensity of Grazing and the Herbage Consumption and Growth of Calves

Cited by 43 publications

References 17 publications

Habitat structure versus food abundance: the importance of sparse vegetation for the common redstart Phoenicurus phoenicurus

Habitat structure versus food abundance: the importance of sparse vegetation for the common redstart Phoenicurus phoenicurus

Milk-fed calves:4. The effect of herbage allowance and milk intake upon herbage intake and performance of grazing calves

Efeitos de diferentes intensidades de pastejo em pastagem nativa melhorada sobre o desempenho animal

Contact Info

Product

Resources

About