Grazing interval, stocking rate, and pasture production

Campbell, A. G.

doi:10.1080/00288233.1969.10427078

Cited by 10 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Depressions in pasture production under high stocking similar to those measured in Years 1 and 3 of this trial have been reported by Campbell (1969) and Joyce (1970). The significantly higher production from the high-stocked than from the low-stocked pastures in Year 5 is considered to be the result of a change in experimental technique.…”

Section: Pasture Dm Productionsupporting

confidence: 86%

“…Joyce (1970) found that pasture dry matter (DM) from ryegrass-white clover pastures was increased under a combination set-stocking and rotational-grazing management system when the stocking rate was 24 ewes/ha rather than 19 or 29 ewes/ha. Campbell (1969) reported a depression in pasture production under rotational grazing when the stocking rate was increased from t Present address: Ruakura Agricultural Research Centre, P.B., Hamilton, New Zealand. 24 ewes/ha to 36 ewes/ha.…”

Section: At Marton Elliottmentioning

confidence: 99%

See 1 more Smart Citation

I. Pasture production and botanical composition

Bircham

Crouchley²

1976

New Zealand Journal of Experimental Agriculture

View full text Add to dashboard Cite

Effects of superphosphate, lime, and stocking rate on pasture production were studied over a 5-year period on a central yellow-grey earth on the Wairarapa Plains at the Masterton Field Research Area. A high annual rate of superphosphate (500 kg/hal did not increase pasture production above that obtained from a low annual rate (125 kg/ha) , but lime (6300 kg/hal increased pasture production. A high stocking rate (22 ewes/hal decreased pasture production in 2 years. Point analysis of botanical composition showed that browntop (Agrostis tenuis Sibth.) cover increased to a maximum in the third year and then declined. Both the high rate of superphosphate and the lime significantly reduced browntop cover. Ryegrass (Lolium x hybridum Hausskn.) and white clover (Trifolium repens 1.) cover increased linearly with time, the spring recordings being significantly correlated with the previous summer's rainfall.

show abstract

Section: Pasture Dm Productionsupporting

confidence: 86%

Section: At Marton Elliottmentioning

confidence: 99%

I. Pasture production and botanical composition

Bircham

Crouchley²

1976

New Zealand Journal of Experimental Agriculture

View full text Add to dashboard Cite

show abstract

“…The following year, which was the second full grazing year of the sward, the situation was reversed and the high stocking rate grew more grass than the medium, with the difference occurring during the summer months. The absence of a consistent reduction of grass production by a high stocking rate is contrary to the experience of Campbell (1969) with sheep and to the findings for February lambing (Orr and Newton, 1984). Frame (1975).…”

Section: Animal Performancecontrasting

confidence: 78%

The productivity of May‐lambing ewes grazed at three stocking rates on lowland grass

Newton¹,

Betts²,

Wilde³

1983

Grass and Forage Science

View full text Add to dashboard Cite

For the 2 years 1977 and 1978 Masham ewes grazed a perennial ryegrass {Lolium perenne cv. S24) pasture from the beginning of April until the end of September each year. Twelve ewes were allocated to each of the three stocking rate treatments, 12 {L), 16 {M) and 20 {H) ewes per ha. Each treatment was rotationaliy grazed around six paddocks with a forward creep for the lambs. Conservation cuts were taken from each treatment in late May and were generally sufficient to cover a 3-month winter feeding period for treatments L and M but were always insufficient for treatment H. Lambing took place at pasture during the second half of May. No concentrates were fed to the ewes during late pregnancy or lactation but lamb birth weights {4 8 kg) and lamb growth rates over the first 4 weeks (240 g d"') were satisfactory. Organic matter intakes {OMI) of grass by the pregnant ewes {1816,1844 g OMI ewe"') were not affected by the stocking rate. Intake of grass by the lactating ewes was affected by year and by stocking rate. The overall growth rate of lambs was higher on treatment L than either M or H but decreased on all treatments during the latter half of the grazing season, resulting in 43% of L and only 3% of M and H lambs being fit for slaughter by the end of September. The main features of this time of lambing are low costs and the production of predominantly store lambs.

show abstract

“…Boswell (1977) found that cocksfoot needed a longer spell than ryegrass, unless it was grazed laxly. Some work eg Matches (1966) suggested that short spells were acceptable provided defoliation was not cióse, but other authors eg Morris (1969), and Campbell (1969) have demonstrated reduced green herbage production due to the dead material build up associated with lax defoliation. However these results and many like them have been found difficult to apply in practice.…”

Section: The Search For Guidelinesmentioning

confidence: 99%

“…At this stage individual tillers are so small that even the high efficiency of the youngest leaves cannot compénsate for reduced leaf área (Leafe and Parsons, 1983) and tillers die probably because of insufficient substrate to maintain respiraron. At low stocking rates productivity is reduced by the increase of dead material in the canopy, which shades green leaves, and tiller bases (Campbell. 1969), and also by the reduced efficiency of carbón dioxide fixation of leaves initiated and emerging in the sha- de of a tall canopy (Woledge, 1977).…”

Section: Reason For Reduced Production At High or Low Stocking Ratementioning

confidence: 99%