Effect of herbage allowance on pasture utilization, regrowth and milk yield of dairy cows in early, mid and late season

Virkajärvi, Perttu; Sairanen, Auvo; Nousiainen, Juha; Khalili, Hannele

doi:10.1016/s0377-8401(02)00014-7

Cited by 28 publications

(23 citation statements)

References 22 publications

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“…There was a HAL × grazing cycle interaction on postgraze HM (Figure 2A The linear effect of HAL on sward height has been reported for temperate grass pastures (Virkajärvi et al, 2002), but for most tropical species intense stem elongation seems to be the central issue if timing of defoliation is to be addressed. In dwarf elephantgrass (Pennisetum purpureum Schum.…”

Section: Resultsmentioning

confidence: 76%

“…Increasing HAL as a management strategy to maximize animal performance, reduces grazing intensity, leading to continued decline in forage nutritive value and grazing efficiency. Reducing HAL, on the other hand, increases grazing intensity and maximizes animal gain per unit area, and can reduce herbage accumulation in extreme situations (Virkajärvi et al, 2002). Adjei et al (1980) reported, however, that in Cynodon spp.…”

Section: Introductionmentioning

confidence: 99%

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Sward structure and herbage yield of rotationally stocked pastures of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] as affected by herbage allowance

Braga¹,

Pedreira²,

Herling³

et al. 2006

Sci. agric. (Piracicaba, Braz.)

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In ruminant-forage systems herbage allowance (HAL) has a major impact on grazing intensity and sward structure, affecting animals, plants, and ultimately, pasture yield. Data on HAL responses of tropical cultivated pastures are scarce and this information may be useful in optimizing pasture utilization. The objective of this study was to describe and contrast sward structure and herbage accumulation responses of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) ESTRUTURA DO DOSSEL E PRODUÇÃO DE FORRAGEM EM PASTAGENS DE CAPIM MARANDU [Brachiaria

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Sward structure and herbage yield of rotationally stocked pastures of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] as affected by herbage allowance

Braga¹,

Pedreira²,

Herling³

et al. 2006

Sci. agric. (Piracicaba, Braz.)

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“…A altura residual de lâminas (altura residual de perfilhos -altura residual da bainha) foi de 5,4 cm na oferta de forragem de 40 kg MS/vaca.dia e de 1,9 cm na de 25 kg MS/vaca.dia Essa diferença pode explicar variações no consumo de forragem, uma vez que a altura residual de lâminas está associada ao consumo de forragem em situações de pastejo rotativo (Wade et al, 1995;Delagarde et al, 2001a Tabela 2 -Altura pós-pastejo em pastos de azevém-anual manejados em duas ofertas de forragem (P<0,001) quando a oferta de matéria seca total aumentou de 23,5 para 37,0 kg/dia (Tabela 3). A digestibilidade da matéria orgânica da forragem ingerida (P<0,05) e o balanço energético (P<0,001) durante os períodos de avaliação de consumo de forragem foram maiores nos animais mantidos nos pastos com maior oferta de forragem.…”

Section: Resultsunclassified

Consumo de forragem e produção de leite de vacas em pastagem de azevém-anual com duas ofertas de forragem

et al. 2009

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RESUMO -Avaliou-se o efeito de duas ofertas de forragem (25 e 40 kg MS/vaca.dia) sobre o consumo de forragem e a produção de leite em vacas pastejando azevém-anual. Utilizou-se o método rotacionado, em delineamento experimental de dupla reversão, com três períodos de 12 dias e dez vacas da raça Holandesa no terço médio de lactação. O consumo de forragem foi estimado pela produção fecal e pela digestibilidade da forragem ingerida e a produção de leite foi medida diariamente. A biomassa e a altura do dossel antes do pastejo não diferiram entre as ofertas de forragem. A altura pós-pastejo foi maior na oferta de forragem de 40 kg MS/vaca.dia, o que determinou desaparecimento de forragem equivalente a 49,0% nessa oferta de forragem e a 69,0% na oferta de 25 kg MS/vaca.dia. O consumo individual de matéria seca (MS) da forragem foi 11,9 e 16,6 kg/dia e a produção de leite, 18,4 e 21,1 kg/dia nas ofertas de 25 e 40 kg MS/vaca.dia, respectivamente. Vacas leiteiras em pastagem de azevém com alta oferta de forragem podem ingerir mais de 16,0 kg de MS e produzir mais de 20 kg de leite/dia. A produção de leite reduz aproximadamente 0,2 kg a cada kg de diminuição na MS de forragem oferecida. Palavras-chave: Lolium multiflorum, óxido de cromo, pastejo rotacionado Herbage intake and milk yield of dairy cows grazing Italian ryegrass at two herbage allowancesABSTRACT -The effect of two herbage allowances (25 and 40 kg dry matter/cow.day) were assessed on the herbage intake and milk yield of dairy cows grazing Italian ryegrass. A rotational grazing system was used, according to a ChangeOver procedure with three 12-day periods and ten Holstein cows in mid-lactation. Individual herbage intake was estimated from fecal output and the digestibility of the selected herbage and the milk yield was measured daily. Pre-grazing sward height and herbage mass at ground level did not differ between treatments. Post-grazing sward height was higher 40 kg dry matter/cow.day and the pasture disappearance rate from the initial sward was 49.0% and 69.0%, respectively. The individual dry matter intake of the herbage was 11.9 and 16.6 kg kg/day and the milk yield was 18.4 and. 21.1 kg/day at the allowances 25 and 40 kg dry matter/cow.day, respectively. Dairy cows grazing Italian ryegrass pasture, with a high forage allowance, can eat more than 16.0 kg DM/day and produce more than 20 kg milk/day. The milk yield decreased around 0.2 kg per kg of reduction in DM offer.

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“…The recommended post-grazing SH for high production dairy cows in Finland is 9-10 cm and the proportion of infrequently grazed area less than 40% (Virkajärvi et al 2002). Suckler cows in extensive production should manage well with a lower post-grazing SH and a smaller proportion of infrequently grazed area than dairy cows.…”

Section: Manninen M Et Al Effects Of Winter Feeding Strategies On mentioning

confidence: 99%

Effects of winter feeding strategies with alternative feeds on the performance of mature suckler cows and their progeny

Manninen¹,

Saarijärvi²,

Huhta³

et al. 2008

AFSci

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The present study evaluated the effects of feeding strategies with alternative feeds on the performance of mature suckler cows and their progeny during indoor feeding and subsequent grazing. In both experiments, a 2 × 2 factorially arranged design consisted of two feeding strategies (Step-up, S; Flat-rate, F) and two diets (Control, C; Alternative, A). The aim of Strategy F was to offer the cows the same amount of energy as offered on Strategy S, but at a constant daily level. In Experiment 1, cows on Diet C were offered grass silage and straw and on Diet A grass silage and a fl our-mill industry by-product. On Strategy S, feeding was stepped with barley (0, 1.5 and 3.5 kg d -1 ). On Strategy F, barley was offered 1.43 kg per head daily. In Experiment 2, cows were offered either grass silage (C) or whole-crop barley silage (A) as a sole feed. Strategy S was carried out by offering 68, 95 and 119 MJ metabolizable energy (ME) per cow daily. On Strategy F, roughage was given daily 97 MJ ME. In both experiments, there were no signifi cant differences between treatments in the cow live weight, body condition score, calf pre-weaning live weight gain and cow reproduction. Strategy F can be practised in the nutrition of mature suckler cows in marginal circumstances. Flour-mill industry by-product can partly replace grass silage and straw in the winter diet. Wholecrop barley silage can be offered as a sole feed to suckler cows with good body condition score in autumn.

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Effect of herbage allowance on pasture utilization, regrowth and milk yield of dairy cows in early, mid and late season

Cited by 28 publications

References 22 publications

Sward structure and herbage yield of rotationally stocked pastures of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] as affected by herbage allowance

Sward structure and herbage yield of rotationally stocked pastures of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] as affected by herbage allowance

Consumo de forragem e produção de leite de vacas em pastagem de azevém-anual com duas ofertas de forragem

Effects of winter feeding strategies with alternative feeds on the performance of mature suckler cows and their progeny

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