A comparison of “Grasslands Ariki” and “Grasslands Ruanui” ryegrasses for lamb fattening in Southland

Harris, Andrea; Johnston, J.

doi:10.1080/00288233.1967.10426364

Cited by 4 publications

(7 citation statements)

References 2 publications

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“…Ariki is a persistent hybrid ryegrass with a wide seasonal spread of production (Barclay 1963;Lancashire et al 1979). Harris & Johnston (1967, during a series of animalfattening experiments in Southland, likewise confirmed Ariki's superior performance resulting in improved liveweight gains in lambs compared with 'Grasslands Nui' perennial ryegrass (L. perenne L.). This result has lately been confirmed by Fletcher (1986) in a comparative ryegrass endophyte (Acremonium) experiment conducted in Canterbury.…”

Section: Introductionmentioning

confidence: 51%

“…In terms of lamb production at Gore, Hickey & Baxter (1989) have demonstrated the advantage of winter feeding of Moata compared with Nui, whereas 'Grasslands Ariki' hybrid ryegrass is advantageous in autumn compared with 'Grasslands Ruanui' perennial ryegrass (Harris & Johnston 1967. However, cultivar variation in terms of measurable animal performance (e.g., Wilson 1968;Ulyatt 1971) between closely related species of ryegrass may be difficult to demonstrate particularly for dairy production (e.g., Wilson & Dolby 1967;McCallum & Thomson 1994).…”

Section: Total Herbage Productionmentioning

confidence: 99%

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Evaluation of seven Italian and hybrid ryegrasses under sheep grazing in Southland, New Zealand

Hickey

Hume

1994

New Zealand Journal of Agricultural Research

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Three Italian and four hybrid ryegrass cultivars (Lolium multiflorum and L. boucheanum Syn. L. hybridum) sown with the white clover cultivar Grasslands Huia (Trifolium repens), were evaluated under frequent/hard grazing or infrequent/ lax grazing. Dry matter (DM) yields and species composition were assessed for 5½ years. Ryegrass tiller and white clover growing point population densities were determined annually, and leafrstem ratios every spring and autumn. Ryegrass tillers were assessed for infection with an Acremoniumlike endophytic fungus and bacterial wilt disease (Xanthomonas campestris pv. graminis). The Italian ryegrass cultivars Moata and Concord had total yields 33% greater than the mean of the other cultivars (1800 kg DM/ha) over the first autumn and winter. The Italian cultivars persisted well for 3 years, except Concord which had a high incidence (34%) of bacterial wilt. Of the hybrid ryegrasses, cultivar Corvette had high ryegrass yields in the first year (9800 kg DM/ha), similar to those of the Italian cultivars, and continued to be high-yielding and persistent throughout the experiment. However, its degree of aftermath heading was high and probably reduced ryegrass herbage quality in summer and autumn. An inverse relationship between ryegrass yield and white clover yield resulted in few significant differences in total yields between cultivars. Infrequent/lax grazing maximised total annual yields (+5%) but decreased white A94044 Received 21 April 1994; accepted 4 August 1994clover yields (-13%). With the importance placed on achieving high white clover growth in the cool temperate environment of Southland, choice of ryegrass cultivar should consider factors such as pasture quality (primarily percentage composition of white clover), tolerance of the cultivar to a range of grazing managements, and seasonal herbage production. The presence or absence of endophyte was not considered a major factor influencing the long-term persistence or productivity of the cultivars evaluated at this site.

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Section: Introductionmentioning

confidence: 51%

Section: Total Herbage Productionmentioning

confidence: 99%

Evaluation of seven Italian and hybrid ryegrasses under sheep grazing in Southland, New Zealand

Hickey

Hume

1994

New Zealand Journal of Agricultural Research

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“…There were two stocking rates in spring and three in autumn. These rates and the duration of the trial, were as follows: Huia' white clover) and grazed as reported pre-Sub-plot size was 0.27 ha for the low rate and viously (Harris & Johnston 1967). 0.13 ha for the high rate in spring, and in autumn The experiment was in two parts in each of 2 each sub-plot was 0.13 ha.…”

Section: Methodsmentioning

confidence: 99%

“…Previous work on evaluation of ryegrass varieties using sheep (Harris & Johnston 1967) pointed to the difficulties inherent in a technique where only one stocking rate was used, and suggested that the most acceptable method appeared to be assessment of animal weight changes at various stocking rates.…”

Section: Introductionmentioning

confidence: 99%

Comparison of ‘Grasslands Ariki’ and ‘Grasslands Ruanui’ ryegrasses for lamb fattening at different stocking rates in Southland

Harris¹,

Johnston²

1973

New Zealand Journal of Experimental Agriculture

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Experiments in spring and autumn of 2 years are reported in which the growth of lambs was compared at various stocking rates on either 'Grasslands Ariki' or 'Grasslands Ruanui' ryegrass growing in association with 'Grasslands Huia' white clover.In spring no differences in lamb meat yield or ewe body weight were associated with ryegrass variety, but in autumn heaviest carcass weights were produced from lambs on Ariki pastures.Stocking rate was more important in determining animal productivity than was grass variety. Highest carcass weight/ha and live-weight change was achieved at the highest rates of stocking, except in autumn of the first year.In autumn of the second year, lambs at the highest rate on Ariki pastures made greater total live-weight gain than those at the same rate on Ruanui. The significance of this to the agriculture of the region is mentioned.

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“…During autumn, New Zealand workers have reported increases of the order of 18% more meat/ ha from cv. Grasslands Ariki ryegrass (an Italian ryegrass-perennial ryegrass hybrid) compared to perennial ryegrass (Harris & Johnston 1967). Italian ryegrass has increased milk production in winter by 17% when compared to perennial ryegrass (Wilson & Dolby 1967).…”

Section: Cultivars With Contrasting Soluble:structural Carbohydrate Rmentioning

confidence: 99%

Improved grass cultivars increase milk and meat production—A review

Reed

1994

New Zealand Journal of Agricultural Research

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Plant breeding and the merit-testing of grass cultivars in multi-site small-plot studies should be supported with some animal production trials if plant improvement is to maintain credibility and remain focussed on feasible, commercially relevant goals. Lactating animals are the most sensitive test animals. Animal production results from cultivar comparisons are considerably influenced by the system(s) of management used. Between-cultivar differences are rarely detected unless pasture is utilised to a high degree. The economic benefits flow mainly from a reduced need for supplementary feed, or in increased carrying capacity. A range of rates of stocking, or a variable stocking policy dependent on minimal sward height or some other objective basis needs to be employed. Where animal production trials have been conducted, they have mainly focussed on cultivars emanating from those plant improvement programmes aimed at improving nutritive value. Given this limitation the reports reviewed provide evidence that grass improvement programmes have raised the feeding value of pasture considerably.

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A comparison of “Grasslands Ariki” and “Grasslands Ruanui” ryegrasses for lamb fattening in Southland

Cited by 4 publications

References 2 publications

Evaluation of seven Italian and hybrid ryegrasses under sheep grazing in Southland, New Zealand

Evaluation of seven Italian and hybrid ryegrasses under sheep grazing in Southland, New Zealand

Comparison of ‘Grasslands Ariki’ and ‘Grasslands Ruanui’ ryegrasses for lamb fattening at different stocking rates in Southland

Improved grass cultivars increase milk and meat production—A review

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