Competitive effects between ten cultivars of perennial ryegrass and three cultivars of white clover grown in association

Camlin, M. S.

doi:10.1111/j.1365-2494.1981.tb01553.x

Cited by 29 publications

(23 citation statements)

References 7 publications

(9 reference statements)

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“…A similar effect was measured in a mowing experiment in the United Kingdom (Camlin 1981) and in a grazing experiment in Southland (Widdup & Turner 1983). This effect reflects differences in competitiveness between white clover and the associated ryegrass, and is probably due mainly to the greater light interception ability of the erect-growing largeleaved cultivars (Aran and Kopu) in competition with ryegrass (Harris 1987).…”

supporting

confidence: 65%

Productivity of white clover cultivars under intensive grazing, as affected by high nitrogen fertiliser application

Ledgard

Sprosen

Steele³

et al. 1995

New Zealand Journal of Agricultural Research

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Nine cultivars of white clover (Trifolium repens L.) were grown with perennial ryegrass (Lolium perenne L.) and their productivity was determined over 3 years under nitrogen (N) fertiliser regimes of 0 or 390 kg N/ha per year. The site was grazed by sheep at 3-or 6-week intervals and after each grazing N fertiliser was applied at 0 or 30 kg N/ha. Fertiliser N application increased total annual pasture production by 25-31%, with the largest proportional responses occurring in autumn and winter. White clover production decreased as a result of N application by 8, 17, and 30% in Years 1, 2, and 3 respectively. During the first 2 years this reduction in clover growth occurred only in spring, and in Year 3 it was also most marked in spring. There was no significant cultivar × N interaction for clover or total pasture production on an annual or seasonal basis. Thus, differences A95023 Received 7 April 1995; accepted 25 October 1995between cultivars in relative clover production were similar in the absence or presence of N fertiliser application. Clover cultivars varied greatly in productivity, and in the nil N treatment there was a positive correlation between clover production and total pasture production in Years 1 and 2, when clover content of pastures averaged 45 and 28% respectively. In all years, Aran and Kopu were higher yielding than all other cultivars. During winter, Kopu was 2-5 fold more productive than other cultivars. In all other seasons, Aran and Kopu were the most productive. There was a highly significant negative correlation between clover production and grass production in both N treatments and in all years. Thus, the more competitive erect-growing, large-leaved cultivars of Aran and Kopu maintained a lower associated grass component in their swards.

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supporting

confidence: 65%

Productivity of white clover cultivars under intensive grazing, as affected by high nitrogen fertiliser application

Ledgard

Sprosen

Steele³

et al. 1995

New Zealand Journal of Agricultural Research

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“…This aspect will be expanded upon in a later paper. No account is taken of this factor in current assessment procedures despite recognition of varietal differences by Aldrich (1987) after the earlier evidence of differences between perennial ryegrass in their aggressiveness towards white clover (Camlin, 1981). If greater reliance is to be made by the industry on clover-based systems of production, it is imperative that some attempt be made at evaluating perennial ryegrass varieties for their compatibility with clover.…”

Section: Discussionmentioning

confidence: 99%

Animal production evaluation of herbage varieties. 1. Comparison of Aurora with Frances, Talbot and Melle perennial ryegrasses when grown alone and with clover

Munro

Davies

Evans

et al. 1992

Grass and Forage Science

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Comparative herbage characteristics and sheep production (ewes and lambs until weaning and lambs thereafter) from swards of Aurora (very early flowering), Frances (early flowering), Talbot (intermediate flowering) and Melle (late flowering) varieties of perennial ryegrass {LoUum perenne) were studied under a continuous variable stocking management based on sward surface height guidelines. The varieties were assessed as grass-only (215 kg N ha""' fertilizer) and grass/clover (83 kg N ha"' fertilizer) pastures.Over 2 years (1985-86) total annual lamb production per hectare from grass-only swards of Aurora was 19% more than that from Frances despite similar herbage productivity. Differences between the varieties in lamb output were more pronounced as grass/clover swards, with Aurora producing 29 and X^'^n more Iamb than Melle and Talbot respectively and with Frances also giving 16% more than Melle. Overall lamb production from grass/clover swards was 10% more than that from the grassonly pastures, mainly due to 69% advantage in individual Iamb growth rates after weaning. Herbage organic matter digestibility, during the post-weaning period, was higher on grass/clover than on grass-only swards, and similarly with Aurora versus the other varieties. Under a frequent cut simulated grazing regime the relative herbage productivity of the four Correspondence: Mr J. M. M. Munro, IGER, Bronydd Mawr Research Centre, Trecastlc, Brecon, Powys, LD3 8RD, UK.varieties differed, with Aurora 13% less productive than Frances.The results are discussed in relation to the limitations of assessing performance under cutting, and the significance of the interaction in animal productivity between the two sward types.

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“…There is evidence that large leaved cultivars can be highly competitive towards perennial ryegrass (Camlin, 1981). Under grazing large leaved types are less persistent than small leaved types (Swift et al 1992).…”

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confidence: 99%

Effect of white clover cultivar on apparent transfer of nitrogen from clover to grass and estimation of relative turnover rates of nitrogen in roots

1996

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The alSparent transfer of N from clover to associated grass was evaluated over a four year period both on the basis of harvested herbage and by taking account of changes in N in stubble and root (to 10 cm depth) in swards with perennial ryegrass and three different white clover cultivars differing in leaf size. The large leaved Aran transferred 15% of its nitrogen while Huia transferred 24% and the small leaved Kent Wild White transferred 34%. When changes in stubble and root N were taken into account the percentage of N transferred was calculated to be 5% less than in harvested herbage only, as the small leaved types had proportionately more N in the roots and stolons, but the large leaved type was probably more competitive towards the grass.Loss of N from clover roots from July to October was compared to that from grass roots in a grass/white clover sward continuously stocked with steers using a method which incorporated tissue turnover and 15N dilution techniques. Less than 1 mg N m -2 d -i was lost from the grass roots. In contrast 8 mg m -2 d -l were estimated to be lost from clover roots while 12 mg N m -2 d -l were assimilated.It is concluded that clover cultivar and competitive ability on grass have to be taken into account together with the relationship between N turnover in roots and N available for grass growth when modelling N transfer in grass/clover associations.

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Competitive effects between ten cultivars of perennial ryegrass and three cultivars of white clover grown in association

Cited by 29 publications

References 7 publications

Productivity of white clover cultivars under intensive grazing, as affected by high nitrogen fertiliser application

Productivity of white clover cultivars under intensive grazing, as affected by high nitrogen fertiliser application

Animal production evaluation of herbage varieties. 1. Comparison of Aurora with Frances, Talbot and Melle perennial ryegrasses when grown alone and with clover

Effect of white clover cultivar on apparent transfer of nitrogen from clover to grass and estimation of relative turnover rates of nitrogen in roots

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