V. Gisborne Plains

Radcliffe, J. E.; Sinclair, D. P.

doi:10.1080/03015521.1975.10425811

Cited by 10 publications

(5 citation statements)

References 5 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ruanui and Nui plots confirm work of Harris et al (1973) and Radcliffe (1974) which has shown that the percentage legume in Southland pastures in low compared with other regions in New Zealand (Brougham, 1960;Radcliffe, 1975a, b;Radcliffe and Sinclair, 1975;Baars et al, 1975). This low legume content and poor pasture growth in the late summer-autumn period causes problems on many Southland farms, in getting lambs to killing weight before there is competition for feed for flushing ewes prior to tupping.…”

Section: Discussionsupporting

confidence: 82%

Some Aspects of the Performance of 'Grasslands Pawera' Red Clover in Southland

Hay¹,

Kelly²,

Ryan³

1976

ProNZG

View full text Add to dashboard Cite

Grazing experiments investigating some factors determining the dry matter production and oestrogenicity of Pawera red clover are described. The legume content of the summer dry matter yield was double that of Ruanui and Huia pasture following overdrilling of lightly paraquated pasture with 4 or 8 kg/ha of Pawera. Persistence of Pawera was demonstrated by its ability to survive in sufficient density under grazing to contribute 35% of total summer dry matter production in its fourth year after direct drilling into lightly paraquated pasture. A Pawera sward when overdrilled with Tama ryegrass or Rahu ryecorn produced the same annual yield as Ariki/ Huia pasture, but the seasonal distribution was markedly different, with production from the overdrilled Pawera being greater in winter and summer. Pure Pawera swards produced some 70% more dry matter during December-February than Ariki/Huia pasture. The significance of this is related to conservation practices in Southland. Oestrogenicity of pure swards of Pawera was determined by measuring the cervical mucus response in ovariectomized ewes. Responses to grazing were equivalent to a single injection of 9 to 31 ug of oestradiol-17B

show abstract

Section: Discussionsupporting

confidence: 82%

Some Aspects of the Performance of 'Grasslands Pawera' Red Clover in Southland

Hay¹,

Kelly²,

Ryan³

1976

ProNZG

View full text Add to dashboard Cite

show abstract

“…1. The average period of soil moisture deficit, normally during January-March, is 47 days (Radcliffe & Sinclair 1975).…”

Section: Methodsmentioning

confidence: 99%

“…1. The average period of soil moisture deficit, normally during January-March, is 47 days (Radcliffe & Sinclair 1975). The six steps contributing to development of the value proposition in this study are outlined below, with a more detailed description of methods following:…”

Section: Modelling Of Seasonal Pasture Supplymentioning

confidence: 99%

“…However, a number of contextual factors present a challenge to the persistence of such cultivars, namely: a) seasonal soil moisture stress resulting from climate patterns, shallow soils and slope which influence radiation input and soil moisture retention; b) year-round in-situ intensive grazing by livestock; c) low natural soil fertility and pH, with typically inadequate fertiliser and lime inputs to remedy this; and d) a range of pests. Legumes are particularly sensitive to all these factors and are consequently of relatively low abundance in hill-country pastures, particularly in summer-dry regions such as the east coast of the North Island (Radcliffe & Sinclair 1975). This limits the productivity of the grass component, since N-fixation inputs are low.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantifying the value proposition for white clover persistence on a New Zealand summer-dry hill-country farm

Dodd¹,

Tozer²,

Vogeler³

et al. 2020

Journal of NZ Grasslands

View full text Add to dashboard Cite

The improvement in forage quality and quantity of summer-dry hill country pasture resulting from the introduction of clover is well recognised. However, ensuring the persistence of the commonly availablecultivars is challenging, in the face of seasonal moisture stress, intensive grazing, competition from established well-adapted pasture species, low soil fertility and low soil pH – conditions typical of the East Coast of the North Island. Here we quantify the value proposition associated with the introduction of white clover into a case study on a Gisborne sheep and beef farm, using a six-step process. A topographically explicit approach is taken, using an understanding of the underlying spatial variability, based on a combination of soil and pasture measurements, APSIM simulation modelling of pasture growth and farm system modelling of enterprise performance. We show that from a baseline of a typical low-fertility, diverse species hill country pasture, white clover introduction can increase spring and summer forage consumption by 17%, enabling inclusion of an additional 6-month bull finishing enterprise generating a 32% greater carcass weight production and leading to a 49% improvement in farm system EBIT. This represents a positive net present value of over $360,000 for the original investment in white clover establishment into existing pastures.

show abstract

“…The ideal combination of ryegrass and white clover defies definition and is likely to vary from situation to situation. However, the importance of perennial ryegrass in New Zealand pastures can be seen in Table 1, which shows the percentage contribution of the ryegrass to the annual pdsture dry matter (DM) yields reco'rded in rate-of-growth mowing studies (Radcliffe, 1974a(Radcliffe, , 1974b(Radcliffe, , 1975(Radcliffe, , 1976Radcliffe and Sinclair, 1975;Baars et al, 1975;Baars, 1976;Round-Turner et al, 1976). These represent long-term-studies which have been conducted throughout New Zealand on improved pastures.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Perennial Ryegrass Component of Grazed Pastures

Boswell¹,

Crawford²

1978

ProNZG

View full text Add to dashboard Cite

The contribution of perennial ryegrass to pasture production is dependent on the stage of development of the pasture, climate and pasture management. Although variability in the percentage of ryegrass in improved pastures is less than in developing pastures, changes in the ryegrass component in response to different managemcnts can be marked. Tiller counts demonstrated a lower population of ryegrass tillers under rotational grazing by cattle than under sheep. This was increased by changing either from cattle to sheep grazing or by hard set stocking with sheep during spring. Grazing to 3 cm produced more dense ryegrass pasture than grazing to 6 cm. Severity of grazing appeared to be particularly important in dry conditions when grazing below 3 cm is likely to reduce tiller density. A range of management options is therefore available to encourage the perennial ryegrass component, and thus total dry matter production, of improved pasture.

show abstract

V. Gisborne Plains

Cited by 10 publications

References 5 publications

Some Aspects of the Performance of 'Grasslands Pawera' Red Clover in Southland

Some Aspects of the Performance of 'Grasslands Pawera' Red Clover in Southland

Quantifying the value proposition for white clover persistence on a New Zealand summer-dry hill-country farm

Changes in the Perennial Ryegrass Component of Grazed Pastures

Contact Info

Product

Resources

About