Pasture species and drought impact on milk yield 1. Milk yield responses in the Waikato

Thom, E. R.; Clark, D. A.; Vught, V. T. Van; Waugh, C. D.

doi:10.33584/jnzg.1998.60.2313

Cited by 11 publications

(13 citation statements)

References 7 publications

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“…There are surprisingly few published comparisons between perennial ryegrass and tall fescue for milk yield in a grazing environment. In New Zealand (Thom, Clark, van Vught, & Waugh, ) and Australia (Chapman, Tharmaraj, & Nie, ), comparisons of perennial ryegrass or tall fescue in a mixture with other legumes and forbs showed there were benefits from tall fescue mixtures in warmer environments. As far as we are aware, this is the first study to compare milk yield of dairy cows grazing ryegrass or tall fescue in binary and multispecies pastures.…”

Section: Discussionmentioning

confidence: 99%

Milk yield and nitrogen excretion of dairy cows grazing binary and multispecies pastures

Bryant

Miller

Greenwood

et al. 2017

Grass and Forage Science

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Three grazing experiments were carried out in late spring (early lactation), summer (mid‐lactation) and autumn (late lactation) to compare the effects of perennial ryegrass cultivar or grass species, sown in binary or multispecies mixtures, on milk yield and nitrogen excretion of dairy cows. Replicated groups of multiparous Holstein Friesian × Jersey cows were offered either a control or high‐sugar perennial ryegrass (Lolium perenne) or tall fescue (Festuca arundinacea) base grass in a binary mixture with white clover (Trifolium repens) or in a multispecies mixture with additional legumes, bromegrass (Bromus willdenowii) and forbs. During each 9‐day experiment, botanical composition, milk production and faecal and urine composition were measured. Milk solid (MS) yield for the control ryegrass, high‐sugar ryegrass and tall fescue grass types averaged, respectively, 1.53, 1.64 and 1.70 kg MS cow−1 day−1 for a binary mixture sward, compared with 1.65, 1.54 and 1.53 kg MS cow−1 day−1 for a multispecies sward. Legume content influenced milk production more than the number of species present in a mixture. There was lower urine N concentration from a multispecies sward compared with a binary mixture. Urine N concentration of cows grazing the control ryegrass, high‐sugar ryegrass and tall fescue grass types averaged, respectively, 4.6, 5.3 and 6.8 g N L−1 for a binary mixture, compared with 4.1, 3.9 and 3.9 g N L−1 for a multispecies mixture. Feeding dairy cows on multispecies swards containing forbs presents an opportunity to reduce N losses without compromising milk yield.

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Section: Discussionmentioning

confidence: 99%

Milk yield and nitrogen excretion of dairy cows grazing binary and multispecies pastures

Bryant

Miller

Greenwood

et al. 2017

Grass and Forage Science

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show abstract

“…Such trials are complex and open to a range of interactions and confounding factors, but they are particularly important when a new concept is involved. Livestock performance trials have compared pasture species over a season in sheep (Fraser et al 1999) and dairy (Thom et al 1998) systems. Differences between cultivars in livestock performance have been shown using similar methodology (Chapman et al 1987;Dodd et al 2001;Ryan & Widdup 1997;Westwood & Norriss 2000;Westwood & Norriss 2001).…”

Section: Assessing Impact and Capturing Gainmentioning

confidence: 99%

Pasture plant breeding in New Zealand: where to from here?

Easton¹,

Amyes²,

Cameron³

et al. 2002

ProNZG

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Ecologically sustainable pastures remain the base of New Zealand's competitive advantage in livestock production, but while modest but steady productivity gains from pasture plant breeding have been documented, these appear to be difficult to convert to livestock production, and pasture production is perceived as up against a ceiling. This paper discusses the contribution of pasture plant breeding, focusing on the ryegrasses, and to a lesser extent on white clover. Heritable variation is evident in the basic components of herbage growth and herbage quality. However, changes to individual traits are not reflected in improved integrated field performance. More precise information is required on how factors interact. New breeding technologies will allow integrated improvement of interacting factors. Evaluation trials and modelling should be managed to provide feed-back identifying the specific requirements of future high-performing systems. Keywords: New Zealand, plant breeding, ryegrass, white clover

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“…Suboptimal protein intake for lactation is rare under well-managed pasture although benefits may accrue from elevated herbage protein during winter grazing. Energy limitations for lactation can occur when pasture quality is low (Kolver 2000) during summer dry periods (Barker et al 1998; Thom et al 1998). Cereals Whole-crop cereals for grazing and silage: balancing quality and quantity J. M. DE RUITER, R. HANSON, A.S. HAY, K.W.…”

Section: Introductionmentioning

confidence: 99%

Whole-crop cereals for grazing and silage: balancing quality and quantity

Ruiter¹,

Hanson²,

Hay³

et al. 2002

ProNZG

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There has been a marked increase in the use of cereals for supplementary grazing and silage for the developing dairy industry in the South Island. Cereals provide high energy supplement in autumn/winter or can be used as a high fibre source in spring. Variation in yield potential in cultivar trials in Canterbury was assessed for autumn and spring-sown crops. The aim was to produce high quality cereal feeds with good yield potential by examining the variation among species and cultivar selections in well managed trials. Single-bite crops sown in early autumn in Canterbury provide up to 5.5 t/ha herbage DM yield with at least 17.5 % protein, 12% total soluble carbohydrate including starch (TSC) and metabolisable energy (ME) of 11.3 MJ/kg in mid-June. Multiple graze types (eg. Doubletake triticale) with similar winter productivity and quality to single-bite crops produced an additional 13.5 t/ha biomass for a silage crop. At ensiling, this cultivar had 9.3 MJ/kg ME with mean 19.5% total soluble carbohydrates. Spring-sown cereals for silage produced up to 20 t/ha. Harvest timing was a significant factor in the wide range in quality of herbage for ensiling. Cultivar means ranged from 7.0 - 12.8% DM for protein, 8.7- 31.6% DM for TSC and 8.3-10.5 MJ/kg DM for ME. More mature herbage had reduced organic matter digestibility and higher TSC but reduced ensilability at DM content in excess of 40%. Keywords: dairying, fibre, forage, herbage quality, metabolisable energy, near infrared reflectance spectroscopy, supplements

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Pasture species and drought impact on milk yield 1. Milk yield responses in the Waikato

Cited by 11 publications

References 7 publications

Milk yield and nitrogen excretion of dairy cows grazing binary and multispecies pastures

Milk yield and nitrogen excretion of dairy cows grazing binary and multispecies pastures

Pasture plant breeding in New Zealand: where to from here?

Whole-crop cereals for grazing and silage: balancing quality and quantity

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