Sward characteristics, grass dry matter intake and milk production performance are affected by pre-grazing herbage mass and pasture allowance

Curran, James; Delaby, Luc; Kennedy, E.; Murphy, John; Boland, T. M.; O’Donovan, M.

doi:10.1016/j.livsci.2009.09.004

Cited by 71 publications

(94 citation statements)

References 29 publications

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“…In contrast to the current study, authors have previously reported that as pre-grazing HM increases, pasture digestibility decreases (Curran et al, 2010;1652to 2480kg DM/ha, McEvoy et al, 20091767to 2358kg DM/ha, O'Donovan and Delaby, 2008; 2365 to 3103 kg DM/ha). In these studies, increasing pre-grazing HM was associated with higher postgrazing residual, possibly exacerbating the negative effect of increasing pre-grazing HM on sward nutritive value (Mayne et al, 1987;Stakelum and Dillon, 2007).…”

Section: Herbage Nutritive Valuecontrasting

confidence: 97%

“…Furthermore, it is likely that a wider range in pre-grazing HM is required to create differences in herbage nutritive. Curran et al (2010) showed that the benefits of offering lower pre-grazing HM pastures (2480 to 1652 kg DM/ha) to be cumulative, with improved animal performance observed in the second part of the grazing season. There is little doubt that any cumulative effects would have been captured in the current study as it was executed for the majority of the grazing season.…”

Section: Herbage Nutritive Valuementioning

confidence: 99%

“…Pre-grazing herbage mass (HM) has been described as a major determinant of grass DM intake (GDMI) (Combellas and Hodgson, 1979), pasture quality and milk production (Curran et al, 2010). Hodgson and Wilkinson (1968) reported that lowering pre-grazing HM (7950 to 2180 kg DM/ha 1 ) increased GDMI, because of higher leaf proportions and lower stem and dead proportions in the grazing horizon (O'Donovan and Delaby, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Hodgson and Wilkinson (1968) reported that lowering pre-grazing HM (7950 to 2180 kg DM/ha 1 ) increased GDMI, because of higher leaf proportions and lower stem and dead proportions in the grazing horizon (O'Donovan and Delaby, 2008). Lowering pre-grazing HM has also been shown to increase milk production (Curran et al, 2010;2480 to 1650 kg DM/ha) because of the intake of higher quality herbage ; 5100 to 2900 kg DM/ha, above ground level). However, grazing very low HM pastures may reduce GDMI as intake per bite declines on low HM pastures and cows are unable to fully compensate for the reduction in intake rate by increasing grazing time (Hodgson, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is important to investigate the effects of maintaining varying levels of pre-grazing HM on pasture output at a system level. Although numerous studies (Curran et al, 2010(Curran et al, , 1650 to 2480 kg DM/ha; McEvoy et al, 2009McEvoy et al, , 1780 to 2360 kg DM/ha; Holmes et al, 1992, 5100 to 2900 kg DM/ha above ground level; O'Donovan and Delaby, 2008 2365 to 3100 kg DM/ha above 5 cm; Wales et al, 1999, 3100 to 4900 kg DM/ha above ground level) have investigated the impact of pre-grazing HM on the GDMI and milk production of grazing dairy cows there is little information available in the literature on the effect of maintaining varying levels of pre-grazing HM on pasture growth rates, grazing efficiency and pasture output.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of pre-grazing herbage mass on dairy cow performance, grass dry matter production and output from perennial ryegrass (Lolium perenne L.) pastures

Wims

Delaby

Boland

et al. 2014

Animal

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A grazing study was undertaken to examine the effect of maintaining three levels of pre-grazing herbage mass (HM) on dairy cow performance, grass dry matter (DM) production and output from perennial ryegrass (Lolium perenne L.) pastures. Cows were randomly assigned to one of three pre-grazing HM treatments: 1150 -Low HM (L), 1400 -Medium HM (M) or 2000 kg DM/haHigh HM (H). Herbage accumulation under grazing was lowest (P < 0.01) on the L treatment and cows grazing the L pastures required more grass silage supplementation during the grazing season (+73 kg DM/cow) to overcome pasture deficits due to lower pasture growth rates (P < 0.05). Treatment did not affect daily milk production or pasture intake, although cows grazing the L pastures had to graze a greater daily area (P < 0.01) and increase grazing time (P < 0.05) to compensate for a lower pre-grazing HM (P < 0.01). The results indicate that, while pre-grazing HM did not influence daily milk yield per cow, adapting the practise of grazing low HM (1150 kg DM/ha) pasture reduces pasture DM production and at a system level may increase the requirement for imported feed.

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Section: Herbage Nutritive Valuecontrasting

confidence: 97%

Section: Herbage Nutritive Valuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of pre-grazing herbage mass on dairy cow performance, grass dry matter production and output from perennial ryegrass (Lolium perenne L.) pastures

Wims

Delaby

Boland

et al. 2014

Animal

Self Cite

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The role of an Ascophyllum nodosum extract in lowering the environmental impact and improving nitrogen use efficiency in pasture systems under a reduced nitrogen regime

Quille,

Kacprzyk,

O’Connell

et al. 2024

J Appl Phycol

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Nitrogen is a macronutrient that is applied in substantial amounts as a chemical fertiliser to conventional agricultural systems. However, loss of nitrogen from agricultural systems to the environment, in the form of gases (N2O) and leachate (NO3), is detrimental to the environment. As such, improving the nitrogen use efficiency (NUE) of crops is an essential component of sustainable agriculture. Biostimulants are a category of products that improve NUE when applied to crops and/or soil. Here, we examined the effects of PSI-362, an Ascophyllum nodosum biostimulant mixed with and applied on calcium ammonium nitrate (CAN) granules, on grass yield, quality traits, and environmental impacts in lysimeter trials under natural weather conditions. By using PSI-362, it was possible to reduce nitrogen application by 25% without a significant loss in yield compared to a conventional 100% N system. We also observed an increase in NUE under a 75% N with PSI-362 co-application fertilisation regime, and a significant increase in crude protein content compared to the 100% N fertilisation controls. Furthermore, this reduced nitrogen application also resulted in reduced nitrogen loss through leachate (NO3) and N2O to the atmosphere. The total NUE for PSI-362 + fertiliser granules ranged from 58.7% to 78.6% depending on the biostimulant dose, which was significantly better than the fertiliser alone. Our results showed that this biostimulant, which can easily be incorporated into conventional agronomic practices, allows for a more sustainable approach to pasture-based systems.

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Sorghum silage supplemented with crambe meal improves dry matter intake and milk production in crossbred Holstein cows

Araújo

Bicalho

Rocha

et al. 2017

Trop Anim Health Prod

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Sward characteristics, grass dry matter intake and milk production performance are affected by pre-grazing herbage mass and pasture allowance

Cited by 71 publications

References 29 publications

Effect of pre-grazing herbage mass on dairy cow performance, grass dry matter production and output from perennial ryegrass (Lolium perenne L.) pastures

Effect of pre-grazing herbage mass on dairy cow performance, grass dry matter production and output from perennial ryegrass (Lolium perenne L.) pastures

The role of an Ascophyllum nodosum extract in lowering the environmental impact and improving nitrogen use efficiency in pasture systems under a reduced nitrogen regime

Sorghum silage supplemented with crambe meal improves dry matter intake and milk production in crossbred Holstein cows

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