Pasture management trials on unploughable hill country at te Awa

Suckling, F. E. T.

doi:10.1080/00288233.1959.10418033

Cited by 75 publications

(64 citation statements)

References 3 publications

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“…tiller density at 6 and 4 sampling times respectively, with the differences generally being perenne tillers and a small, generally non-significant trend towards larger, faster-growing tillers within species 'on flatter areas could be expected to result in differences in herbage accumulation between slope classes similar to those between'fertility levels discussed previously. Thus higher herbage accumulation rates have been measured in low-sloping areas than on steeper areas in these systems (Lambert et al 1983) and elsewhere (Suckling 1959;Gillingham 1980). The main variables associated with slope are soil fertility through stock transfer of nutrients from steep to flat areas (Gillingham 1980), treading pressure which is heavier on flatter areas as they often serve as stock camps, and soil moisture and organic matter status which are greater on flat areas (Radcliffe 1968).…”

Section: ~ O~------~~--~--~~--~--~----~--~----~--~----~--~--~ Mar Aprmentioning

confidence: 99%

Leaf and tiller growth ofLolium perenneandAgrostisspp. and leaf appearance rates ofTrifolium repensin set-stocked and rotationally grazed hill pastures

Chapman¹,

Clark²,

Land³

et al. 1983

New Zealand Journal of Agricultural Research

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Growth components of Lolium perenne and Agrostis spp. tillers and Trifolium repens stolon apices were compared for one year under set stocking and rotational grazing with sheep on hill pastures which had had low and high levels of fertiliser input. Leaf appearance rates of L. perenne and Agrostis spp. were unaffected by grazing management or fertiliser level. Leaf appearance in T. repens was also largely unaffected by treatments except in summer when rotational grazing allowed some relief from defoliation stresses and leaf appearance rates were greater than under set stocking during 3 grazing rotations. T. repens leaf appearance rates were slower in winter and increased later in spring than the grasses. For most of the year, tiller bud development in L. perenne was well below the maximum possible because of mutual shading in dense swards (mean total tiller density 29700 tillers/m 2 under set stocking and 20 too/m2 under rotational grazing). L. perenne lamina lengths, tiller lengths, and leaf extension rates were approximately twice those of Agrostis spp. Leaf extension rates were faster under rotational grazing for L. perenne and Agrostis spp. but tiller densities of both species were greater under set stocking. Total leaf growth per unit area is, therefore, likely to be similar under both managements. Slightly greater L. perenne growth and less Agrostis spp. growth per unit area under rotational grazing than under set stocking is indicated by a comparison of individual tiller growth and tiller density data. The results are discussed in relation to published findings from the same systems.

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Section: ~ O~------~~--~--~~--~--~----~--~----~--~----~--~--~ Mar Aprmentioning

confidence: 99%

Leaf and tiller growth ofLolium perenneandAgrostisspp. and leaf appearance rates ofTrifolium repensin set-stocked and rotationally grazed hill pastures

Chapman¹,

Clark²,

Land³

et al. 1983

New Zealand Journal of Agricultural Research

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“…Rumball (1966) and Radcliffe (1968) detected differences in the moisture content of sunny-face and shady-face soils. Suckling (1954Suckling ( , 1959Suckling ( , 1975) recorded temperature differences between aspects, Jackson (1967) calculated differences in net radiation and potential evapotranspiration, and Yates (1970) and Jackson & Aldridge (1972) recorded differences in rainfall between aspects.…”

Section: Introductionmentioning

confidence: 99%

“…Variability of slope and aspect is a characteristic of all hill country and results in the existence of diverse habitats differing in their climatic, edaphic, and biotic characteristics (Suckling 1954(Suckling , 1959Rumball 1966;Radcliffe 1968;Gillingham & During 1973).…”

Section: Introductionmentioning

confidence: 99%

Aspect differences in an unimproved hill country pasture

Lambert¹,

Roberts²

1976

New Zealand Journal of Agricultural Research

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A number of climatic variables were monitored on north, south, east, and west aspects of a hill in the foothills of the southern Ruahine Range, New Zealand, over a 12-month period. Wind speed values were consistently higher on the north aspect than on the west, east, and south aspects. Differences in net radiation between the north and south aspects were largest during the winter and smallest during the summer months. All evapotranspiration values calculated were larger for the north than for the south aspect. Soil moisture tension differences were not detected during winter, but during the remainder of the year soil of the north aspect had the highest moisture tension and that of the south aspect the lowest. Rainfall differences among aspects were difficult to detect because of the effects cf wind on rain gauge catch. Differences among aspects in average monthly 40 mm air temperature were not appa-rent. However, large differences in the average monthly 40 mm soil temperature of the various aspects were detected. During the Tanuary to August period the north aspect was warmest and the south aspect coolest, but for the remainder of the year the east aspect was warmest. The interrelationships of some of the above variables are discussed. It is suggested that the significance of wind in the hill pasture environment is underestimated.

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“…The effectof grazing management, fertiliser history, slope, and aspect on pasture production, pasture composition, and the above-ground component of nutrient cycles has been investigated in some detail in hill country pastures in New Zealand (Suckling 1975;Gillingham 1980;Lambert et al 1983). The effect of these factors on root growth and distribution and the below-ground components of the nutrient cycle of hill country pastures, however, has not been quantified.…”

Section: Introductionmentioning

confidence: 99%

Root distribution in a low fertility hill country sward grazed by sheep

Barker¹,

Zhang²,

Mackay³

1988

New Zealand Journal of Experimental Agriculture

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In a preliminary study, root distribution, biomass, length, and surface area were measured to a depth of 800 mm in mid summer on a sunny (north) and shady (south) aspect of a low fertility hill country sward grazed by sheep. The dominant grass species were browntop (Agrostis capillarisL.), crested dogstail (Cynosurus cristatus L.), and yorkshire fog (Holcus lanatus L.). White clover (Trifolium repens L.), suckling clover (T. dubium Sibth. L.), and lotus (Lotus pedunculatus Cav.) were the dominant legume species. Calculated root biomass for the profile down to 800 mm was 14410 kg dry matter (DM)/ha on the shady face and 21 470 kg DM/ha on the sunny face. This was 2.3 -3.5 times more than above-ground biomass produced on an annual basis and 6 -7 times the total above-ground pasture biomass at the times of sampling. The large root biomass, and consequently the large quantities of nutrients involved in the below-ground component of the nutrient cycle, highlight the need for further research to quantify and characterise the root dynamics of grazed swards.

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Pasture management trials on unploughable hill country at te Awa

Cited by 75 publications

References 3 publications

Leaf and tiller growth ofLolium perenneandAgrostisspp. and leaf appearance rates ofTrifolium repensin set-stocked and rotationally grazed hill pastures

Leaf and tiller growth ofLolium perenneandAgrostisspp. and leaf appearance rates ofTrifolium repensin set-stocked and rotationally grazed hill pastures

Aspect differences in an unimproved hill country pasture

Root distribution in a low fertility hill country sward grazed by sheep

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